GPA Calculator USA 2026 — Compute Weighted & Unweighted GPA, Cumulative & Semester GPA Online (4.0 Scale)

GPA Calculator USA 2026 — Compute Weighted & Unweighted GPA, Cumulative & Semester GPA Online (4.0 Scale)

Free online GPA Calculator USA — compute your American GPA on the standard 4.0 scale (A=4.0, A−=3.7, B+=3.3, B=3.0, B−=2.7, C+=2.3, C=2.0, C−=1.7, D+=1.3, D=1.0, F=0.0) with 3 powerful modes: Standard Unweighted GPA, Weighted GPA with AP/IB/Honors boost (+0.5 Honors, +1.0 AP/IB), and Cumulative GPA from semester GPAs. Supports both US high school GPA (for Ivy League and college admissions) and US college GPA (for graduate school, jobs, Latin Honors). Includes Ivy League / T-20 / T-50 university tier cutoffs, Latin Honors thresholds (Cum Laude / Magna Cum Laude / Summa Cum Laude), Quality Points methodology, and percentage-to-letter grade conversion.

📊 4.0 Scale Standard 🏆 Weighted GPA (AP/IB) 🎓 Latin Honors 🏛️ Ivy League Targets
3 Calculator Modes 2026 Updated Unweighted + Weighted High School & College 100% Free

US GPA Calculator — 3 Modes for Every Use Case

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Mode 1: Standard Unweighted GPA
Enter courses with letter grades (A through F). Calculator computes standard unweighted 4.0 GPA — used by most US college admissions for fair cross-school comparison.
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Mode 2: Weighted GPA NEW
Mark each course as Regular, Honors, or AP/IB. Calculator shows both unweighted AND weighted GPA side-by-side with the boost effect. Essential for US high school class rank.
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Mode 3: Cumulative GPA
Combine multiple semester GPAs with credit weights into cumulative GPA. Useful for college students tracking GPA across all completed terms toward graduation.

GPA Calculator USA 2026 — Unweighted, Weighted & Cumulative

Enter each course's name, credit hours (typically 3–4 for college, or 1.0 unit per high school class), and letter grade. Calculator computes standard unweighted GPA on the 4.0 scale.

Course
Credits
Grade
US-specific tip: American universities and high schools have varying GPA reporting conventions. Most use the standard 4.0 unweighted scale plus weighted GPA for AP/Honors. Some use 4.3 or 4.5 scales where A+ = 4.3 or 4.5. Always check your specific institution's grading policy in the student handbook. For college admissions, most universities recompute your GPA using their own internal formula — the GPA on your transcript is what you report; their recomputation is what they actually use for ranking.

🇺🇸 US 4.0 GPA Scale — Complete Letter Grade Reference

The standard US 4.0 grading scale with all letter grades, grade points, and approximate percentage equivalents:

A
4.0 GP
93–100%
A−
3.7 GP
90–92%
B+
3.3 GP
87–89%
B
3.0 GP
83–86%
B−
2.7 GP
80–82%
C+
2.3 GP
77–79%
C
2.0 GP
73–76%
C−
1.7 GP
70–72%
D+
1.3 GP
67–69%
D
1.0 GP
60–66%
F
0.0 GP
Below 60%
US Standard GPA Formula: GPA = Σ(Grade Points × Credit Hours) ÷ Σ(Credit Hours) Quality Points (alternative naming): Quality Points = Grade Points × Credit Hours per course Worked example: 3 courses — English (3 credits, A=4.0), Math (4 credits, B+=3.3), Chem (4 credits, A−=3.7): GPA = (3×4.0 + 4×3.3 + 4×3.7) ÷ (3+4+4) = (12+13.2+14.8) ÷ 11 = 40.0 ÷ 11 = 3.64
Scale variants you might encounter: Standard 4.0 scale caps at A=4.0 (no A+ boost). 4.3 scale includes A+=4.3 (Princeton, McGill, some private US schools). 4.5 scale is rare in college but common in weighted high school GPA. 5.0 scale is weighted high school GPA (AP=5.0). When applying to colleges, your GPA may be on a different scale than the application form expects — admissions officers usually normalize internally.

🏆 Weighted vs Unweighted GPA — Detailed Comparison

US high schools (and some colleges) report two GPA values to reward students for taking more rigorous coursework. Understanding the difference is critical for college applications:

AspectUnweighted GPAWeighted GPA
Maximum value4.05.0 (sometimes 4.5)
Regular classA = 4.0A = 4.0 (no boost)
Honors classA = 4.0 (same)A = 4.5 (+0.5 boost)
AP / IB classA = 4.0 (same)A = 5.0 (+1.0 boost)
F (Fail)0.00.0 (no boost)
Used byCollege admissions for fair comparisonHigh school class rank, GPA tracking
Best for showcasingPure academic performanceCourse rigor + performance combined
What admissions seesBoth, with course list/transcriptBoth, plus actual difficulty assessment
Weighted GPA Boost System: Regular Class: Grade Points = Standard 4.0 scale Honors Class: Grade Points = Standard + 0.5 (e.g. A=4.5) AP / IB / Dual Enrollment: Grade Points = Standard + 1.0 (e.g. A=5.0) Worked example: 4 regular A's and 4 AP A's: Unweighted = (4×4.0 + 4×4.0) ÷ 8 = 4.00 Weighted = (4×4.0 + 4×5.0) ÷ 8 = 4.50

When each GPA matters most:

  • Unweighted GPA — what most colleges recalculate internally to compare students from different schools fairly. Common Application explicitly asks for unweighted.
  • Weighted GPA — what your high school uses for class rank and what appears on most transcripts as the headline number. Class valedictorian determined by weighted GPA.
  • Both matter for Ivy League — Harvard, Stanford, MIT, Princeton look at unweighted GPA AND course rigor AND number of AP/Honors. A 4.0 unweighted with 0 AP is weaker than a 3.8 unweighted with 10 APs.
  • Latin Honors (college) — universally based on unweighted college GPA. Cum Laude 3.5, Magna 3.7, Summa 3.9 at most US universities.
Common pitfall: Don't assume "higher GPA is always better." A student with 5.0 weighted GPA from a school that gives generous AP boosts may actually have weaker unweighted performance than a 3.9 unweighted student. Admissions officers see through inflation. Focus on maintaining strong unweighted GPA while taking the most challenging courses available — this dual signal is what Ivy League admissions actually rewards.

🎓 Latin Honors at Graduation — Cum Laude, Magna, Summa

American universities award Latin Honors at graduation based on cumulative GPA. These distinctions appear on diplomas, transcripts, and resumes throughout your career:

Cum Laude 🥉
GPA 3.5+
"With Honor" — Top 25-30% of graduating class. Cum Laude is the entry-level Latin Honor. Achievable with consistent A−/B+ performance across all 4 years. Common at most US universities.
Magna Cum Laude 🥈
GPA 3.7+
"With Great Honor" — Top 10-15% of graduating class. Magna Cum Laude requires mostly A's with occasional A−. Strongly competitive for grad school admission. Award appears prominently on transcript.
Summa Cum Laude 🥇
GPA 3.9+
"With Highest Honor" — Top 1-5% of graduating class. Summa Cum Laude is the highest Latin Honor in the US system. Essentially requires straight A's with maybe 1-2 A−'s across the entire degree.
Latin Honors thresholds vary by institution: Some universities use class rank instead of fixed GPA cutoffs (e.g., Harvard sets Magna Cum Laude at top 20% of class, regardless of absolute GPA). Some Ivy League schools have higher thresholds (Princeton Summa requires 3.95+). State universities often use lower thresholds (Cum Laude 3.3+). Check your university's specific Honors policy in the academic catalog. The GPAs shown above are the most-common standard thresholds.
Beyond Latin Honors — other US academic distinctions: Dean's List (typically GPA 3.5+ for one semester, recognized each term); President's List (typically GPA 3.85+ or 4.0); Phi Beta Kappa (invitation-only liberal arts honor society, ~10% of graduates at chapter institutions); Tau Beta Pi (engineering honor society, top 12.5% of class); Departmental Honors / Honors Thesis (research-based, separate from GPA Latin Honors).

🏛️ US University GPA Cutoffs — Ivy League to State Flagship (2026)

Different tiers of US universities have very different GPA expectations. Here are typical admissions thresholds for 2026 (undergraduate and Master's, unweighted GPA):

Ivy League + MIT, Stanford, Caltech
Tier 1 — Most Competitive
Undergrad: 3.9+ unweighted with 8-12 AP courses and strong test scores. MS/PhD: 3.7+ undergrad GPA + research + 320+ GRE. Examples: Harvard, Yale, Princeton, MIT, Stanford, Caltech, Columbia, UPenn, Dartmouth, Brown, Cornell.
T-20 Universities
Tier 1 — Highly Competitive
Undergrad: 3.85+ unweighted with rigorous coursework. MS: 3.5+ undergrad GPA. Examples: Duke, Northwestern, Johns Hopkins, UChicago, UCLA, UC Berkeley, Carnegie Mellon, Georgetown, Vanderbilt, Notre Dame.
T-50 Universities
Tier 2 — Competitive
Undergrad: 3.7+ unweighted. MS: 3.3+ undergrad GPA. Examples: NYU, Boston University, USC, Tufts, Wake Forest, UNC Chapel Hill, U Michigan Ann Arbor, U Virginia, William & Mary, U Florida.
T-100 Universities
Tier 2 — Solid
Undergrad: 3.5+ unweighted. MS: 3.0+ undergrad GPA. Examples: Pepperdine, U Pittsburgh, Texas A&M, Penn State, Purdue, U Washington, Ohio State, Georgia Tech (engineering competitive).
State Flagship Universities
Tier 3 — Accessible Quality
Undergrad: 3.3+ unweighted (in-state, possibly lower with auto-admit policies). MS: 3.0+ undergrad GPA. Most US state flagship universities — provides excellent value plus regional reputation.
State / Regional Public Universities
Tier 3 — Accessible
Undergrad: 2.5–3.0+ unweighted. MS: 2.75+ undergrad GPA. Most regional state universities, branch campuses, and dedicated teaching-focused colleges. Some auto-admit on grades alone.
Community Colleges
Open Admission
Open enrollment — typically no GPA minimum for admission. For transfer to 4-year university: 2.5+ (most) to 3.0+ (UC system, top state schools). Community college is the most accessible path back to higher GPAs.
Medical & Law Schools
Professional
Med School: Science GPA 3.7+ + Cumulative 3.6+ + strong MCAT. Law School: 3.5+ cumulative + LSAT 165+. Top med/law (Harvard, Stanford, Yale Law) want 3.9+ GPA + top-percentile test scores.

📐 Quality Points Methodology — How US GPA Is Officially Computed

US universities use a Quality Points system to compute GPA officially. Understanding this helps you interpret your transcript and verify GPA calculations:

Step-by-Step Quality Points Calculation: Step 1: Quality Points per Course = Grade Points × Credit Hours Step 2: Total Quality Points = Sum across all courses Step 3: Total Credit Hours Attempted = Sum of all course credits Step 4: GPA = Total Quality Points ÷ Total Credit Hours Attempted Worked example for a Fall semester: ENGL 101 (3 credits, A=4.0): Quality Points = 3 × 4.0 = 12.0 MATH 151 (4 credits, B+=3.3): Quality Points = 4 × 3.3 = 13.2 CHEM 101 (4 credits, A−=3.7): Quality Points = 4 × 3.7 = 14.8 HIST 102 (3 credits, A=4.0): Quality Points = 3 × 4.0 = 12.0 PSYC 100 (3 credits, B+=3.3): Quality Points = 3 × 3.3 = 9.9 Total Quality Points = 61.9 | Total Credit Hours = 17 | GPA = 61.9 ÷ 17 = 3.64
Things that affect Quality Points: Withdrawn courses (W) earn 0 quality points and 0 credit hours — they don't affect GPA. Pass/Fail courses (P) earn quality points without affecting GPA on most US transcripts. Incomplete (I) grades may eventually convert to F (which adds 0 quality points + credit hours = drags down GPA). Audit (AU) grades earn no credit and don't count. Repeated courses usually replace the original grade (varies by institution policy).

Worked Example — High School Senior with AP Courses

Let's trace a US high school senior's GPA showing unweighted AND weighted calculation. Each course = 1.0 unit (standard US HS practice):

CourseTypeGradeUnweighted GPWeighted GP
English 11RegularA4.04.0
Algebra II HonorsHonorsA4.04.5 (+0.5)
AP US HistoryAPA−3.74.7 (+1.0)
AP BiologyAPB+3.34.3 (+1.0)
Spanish IIIRegularA4.04.0
AP Computer Science AAPA4.05.0 (+1.0)
PE / HealthRegularA4.04.0
Totals (÷ 7 units):3.8574.357
Calculation: Unweighted GPA = (4.0+4.0+3.7+3.3+4.0+4.0+4.0) ÷ 7 = 27.0 ÷ 7 = 3.857 Weighted GPA = (4.0+4.5+4.7+4.3+4.0+5.0+4.0) ÷ 7 = 30.5 ÷ 7 = 4.357 Boost from AP/Honors: 4.357 − 3.857 = +0.500 GPA boost
What this profile means for college admissions: Unweighted GPA 3.857 with 4 AP courses signals strong academic rigor + high performance. This puts the student in competitive range for T-20 universities (3.85+ unweighted typical). With high SAT/ACT scores, leadership, and quality essays, this profile could compete for Ivy League. The weighted 4.357 will appear on the transcript for class rank purposes — likely top 10-15% at most US high schools. Admissions officers see both AND assess the actual rigor of AP courses taken vs available.

US GPA Quick Lookup — Letter, %, GPA Cross-Reference

Comprehensive reference table linking percentage, US letter grade, GPA, weighted equivalents, and US tier interpretations:

PercentageLetterGPA (4.0)Honors GPA (4.5)AP/IB GPA (5.0)Interpretation
93–100%A4.04.55.0Excellent — Ivy League target
90–92%A−3.74.24.7Very strong — T-20
87–89%B+3.33.84.3Strong — T-50
83–86%B3.03.54.0Good — Grad school min
80–82%B−2.73.23.7Above average — state univ
77–79%C+2.32.83.3Acceptable — community colleges
73–76%C2.02.53.0Average — basic pass
70–72%C−1.72.22.7Below average
67–69%D+1.31.82.3Marginal pass
60–66%D1.01.52.0Lowest pass — probation risk
<60%F0.00.00.0Fail — no boost applied
How to read this table: Find your percentage in the leftmost column. Move right to see equivalent letter grade, then standard 4.0 GPA, then weighted Honors GPA (4.5 scale with +0.5 boost), then AP/IB GPA (5.0 scale with +1.0 boost), and the typical US university tier interpretation. Note: percentage ranges vary by school — some use 90-100% for A, others 93-100% for A. Check your specific institution's grading policy.

When US GPA Matters Most

  1. College / undergraduate admission applications. Every US college application asks for high school GPA (both weighted and unweighted). Common Application explicitly requests unweighted. Ivy League/MIT/Stanford want 3.9+ unweighted.
  2. Graduate school applications (MS, MBA, MD, JD, PhD). US grad schools require undergraduate cumulative GPA on application. Most have 3.0 minimum, competitive programs want 3.5+, top programs (Harvard MBA, Stanford MS) expect 3.7+.
  3. Latin Honors at graduation. Cum Laude (3.5+), Magna Cum Laude (3.7+), Summa Cum Laude (3.9+) — official designations on diplomas, transcripts, resumes throughout career.
  4. Dean's List recognition. Each semester, students with GPA 3.5+ are typically named to Dean's List. Recognition appears on transcripts and can be highlighted on resumes for early career.
  5. Internship and entry-level job applications. Top US employers (Goldman Sachs, McKinsey, Google, Microsoft, Apple, FAANG) typically filter at 3.5+ GPA for technical/business roles. Some require 3.7+ for management programs.
  6. Scholarship retention. Most US merit scholarships require maintaining minimum cumulative GPA (often 3.0–3.5) to keep funding. Falling below typically forfeits the scholarship.
  7. NCAA athletic eligibility. Student-athletes at NCAA Division I/II schools must maintain minimum GPA (typically 2.0–2.5 for Division I) plus core course requirements to compete.
  8. Visa applications for international students. US F-1 visa renewal and graduate school visa applications consider academic performance, including GPA. Significant GPA drops can affect visa status.
  9. Honor society invitations. Phi Beta Kappa (top 10% of liberal arts graduates), Tau Beta Pi (top 12.5% of engineering), Mortar Board, Beta Gamma Sigma (business) — all GPA-based invitations.
  10. Major declaration requirements. Some impacted majors at major universities (CS at UCB/UCLA, business at Michigan Ross, nursing at Penn) require minimum GPA to declare (typically 3.0–3.5).

7 Strategic Tips for Maximizing US GPA

  1. Take rigorous courses + maintain high grades. Don't sacrifice GPA for "easy A's" in regular courses. Top US colleges value 3.85 unweighted with 8 AP courses MORE than 4.0 unweighted with 0 AP. Balance challenge with achievement.
  2. Use the calculator's Mode 2 (Weighted GPA) every semester. Track both metrics to see how each new course affects your standings. Especially valuable for high school students balancing AP load with maintaining GPA.
  3. Drop courses before deadline if you're below B+. A "W" (Withdraw) on transcript doesn't affect GPA, while finishing with C or below drags it down. Most schools have W-deadline around mid-semester.
  4. Retake courses where allowed (D or F grades). Many US universities have grade replacement policies where retake grade replaces the original in GPA calculation. Check your institution's specific policy.
  5. Take advantage of P/F (Pass/Fail) option for non-essential courses. P doesn't affect GPA (most schools), so taking a difficult elective P/F protects your GPA. Use sparingly — typically 1-2 P/F courses allowed per semester.
  6. Leverage office hours and tutoring for grade improvement. Most US universities provide free tutoring through writing centers, math/science labs, and supplemental instruction. Using these resources typically raises grades by half a letter or more.
  7. Report GPA correctly on applications. Use the exact GPA from your transcript with the scale specified: "3.85 / 4.0 unweighted (4.42 / 5.0 weighted)". Don't round up. Background verification will catch discrepancies.

US GPA Calculator FAQ — 2026 Edition

American GPA is calculated on the 4.0 scale where A=4.0, A-=3.7, B+=3.3, B=3.0, B-=2.7, C+=2.3, C=2.0, C-=1.7, D+=1.3, D=1.0, F=0.0. The formula is: GPA = Σ(Grade Points × Credit Hours) ÷ Σ(Credit Hours). Quality Points = Credit Hours × Grade Points. For weighted GPA (high school), Honors classes add +0.5 boost (max 4.5) and AP/IB classes add +1.0 boost (max 5.0). Most US universities use the standard 4.0 scale; a few private schools use 4.3 or 4.5.
On the US 4.0 scale: 3.9+ is exceptional (top Ivy League undergraduate, Summa Cum Laude), 3.7-3.89 is excellent (Magna Cum Laude, T-20 universities competitive), 3.5-3.69 is good (Cum Laude, Dean's List, T-50 universities competitive), 3.0-3.49 is solid (meets most grad school minimums), 2.5-2.99 is average (acceptable for graduation), below 2.0 is academic probation territory. For Ivy League undergraduate admission: 3.9+ unweighted plus strong test scores and extracurriculars typical. For US MS admission at top-50 universities: 3.5+.
Unweighted GPA uses the standard 0.0-4.0 scale where all courses count equally regardless of difficulty. Weighted GPA gives extra grade points for advanced courses: Honors classes get +0.5 boost (max 4.5), AP/IB classes get +1.0 boost (max 5.0). For example, an A in a regular class = 4.0 unweighted = 4.0 weighted; an A in AP class = 4.0 unweighted = 5.0 weighted. Most US high schools report both. Top US universities consider both along with course rigor in admissions decisions. Common Application explicitly asks for unweighted GPA.
In weighted GPA calculations: AP (Advanced Placement) and IB (International Baccalaureate) classes add +1.0 to grade points (e.g., A in AP class = 5.0 instead of 4.0). Honors classes add +0.5 (e.g., A in Honors class = 4.5). This rewards students for taking more rigorous coursework. Important: only weighted GPA reflects this boost — unweighted GPA stays on the 4.0 scale. College admissions officers consider both, plus the actual difficulty level shown on your transcript and the school's AP availability. For Ivy League admissions, 8-12 AP classes with high grades is typical.
Ivy League universities (Harvard, Yale, Princeton, Columbia, UPenn, Dartmouth, Brown, Cornell) typically expect 3.9+ unweighted GPA alongside 8-12 AP courses, top-percentile SAT (1550+) or ACT (35+), strong essays, meaningful extracurriculars, and excellent recommendation letters. Additionally MIT, Stanford, Caltech (often grouped with Ivy League) have similar expectations. Note: there's no fixed GPA cutoff — Ivy League is holistic admissions. A 3.85 GPA with exceptional achievements (research, USA Olympiad, national leadership) can outcompete a 4.0 GPA with weaker activities. Aim for highest possible GPA + rigorous coursework + meaningful achievements.
It depends on the scale. On the standard unweighted 4.0 scale, the maximum is 4.0 — no, you can't exceed it. On the weighted GPA scale used in US high schools, the maximum is typically 5.0 (for straight A's in all AP/IB classes) or 4.5 (Honors-only boost). Some private universities use 4.3 scale where A+ = 4.3 (Princeton, McGill). So GPAs above 4.0 are common in weighted high school contexts and at institutions using 4.3+ scales. When applying to colleges, be explicit about which scale your GPA is on: "4.42 / 5.0 weighted" or "3.85 / 4.0 unweighted".
These are Latin Honors awarded at graduation by US universities based on cumulative GPA: Cum Laude ("With Honor") = GPA 3.5+, top ~25% of class; Magna Cum Laude ("With Great Honor") = GPA 3.7+, top ~10-15%; Summa Cum Laude ("With Highest Honor") = GPA 3.9+, top ~1-5%. These distinctions appear on diplomas, transcripts, and can be cited on resumes throughout career. Thresholds vary by university — some use class rank instead of fixed GPA. Top universities (Harvard, Princeton) have higher cutoffs (e.g., Princeton Summa 3.95+).
A single F can significantly drag your GPA down because it contributes 0 quality points but the credit hours still count in the denominator. For example, before F: 30 credit hours with 3.8 GPA = 114 quality points. Add 1 F (3 credits): new total = 33 credits, 114 quality points, new GPA = 3.45 — a drop of 0.35 from one F. The impact diminishes as you accumulate more credits. Many US universities allow grade replacement when you retake the F course — the new grade replaces it in GPA calculation. Check your institution's grade replacement policy (usually limited to 1-3 courses).
It depends on your institution's policy. Grade Replacement universities (many state schools and private universities) let you retake D or F courses, with the new grade replacing the original in GPA calculation. Grade Forgiveness policies average original + retake. Both-On-Transcript policies show both grades but count both in GPA. Retaking is most beneficial for F and D grades under grade replacement policies. For C grades, the GPA improvement may not justify the time investment — focus on new courses instead. Check your institution's specific policy in the academic catalog before deciding.
Generally, P (Pass) grades do NOT affect your GPA — they don't earn quality points but also don't contribute credit hours to the GPA denominator. F (Fail) in a P/F course DOES typically count as F in GPA (drags it down). Most universities limit P/F to electives outside your major, capped at 1-2 per semester. P/F is excellent for protecting GPA on challenging electives outside your strengths. Note: medical school admissions, law school admissions, and some grad programs treat P/F courses differently — they may look for letter grades in pre-requisite courses. Check professional school requirements before electing P/F.
Yes, there's variation in US grading: Standard 4.0 scale (most schools) — A=4.0 max. 4.3 scale — A+=4.3 (Princeton, McGill, some private schools). 4.5 weighted — high school weighted with Honors. 5.0 weighted — high school weighted with AP/IB. Percentage scales — some schools use percentage instead of GPA. Cum GPA vs Major GPA — many schools track both separately. Trimester vs Semester — some schools use trimester credit hours. When applying to multiple schools, be precise: include scale and exact value: "3.85 / 4.0 unweighted (4.42 / 5.0 weighted)" prevents confusion.
US colleges look at both, plus your overall course rigor. The Common Application (used by 1000+ US colleges) explicitly asks for unweighted GPA — colleges use this for fair cross-school comparison. Your weighted GPA appears on your transcript and shows class rank. Top US universities (Ivy League, MIT, Stanford) re-calculate your unweighted GPA using their own internal formula to compare you against other applicants from different schools. State universities and less-selective colleges often weight more heavily, accepting weighted GPA from your transcript directly. Best practice: aim for high unweighted GPA WITH rigorous AP/Honors coursework — that's the strongest signal.
Disclaimer: This GPA Calculator USA uses the standard 4.0 grading scale (A=4.0, A-=3.7, B+=3.3, B=3.0, B-=2.7, C+=2.3, C=2.0, C-=1.7, D+=1.3, D=1.0, F=0.0) with weighted GPA boosts of +0.5 for Honors and +1.0 for AP/IB courses. Individual US high schools and universities have their own specific calculation rules — some use 4.3 scales (with A+=4.3), some apply different boost values, some include audit or P/F courses differently, some weight only by core academic courses. The GPA shown on your official transcript is the legally authoritative value — calculator output is reference only. For official applications (college admissions, graduate school, jobs, scholarships, professional schools), always use the GPA value from your official transcript. Universities applying for international student admissions may require formal credential evaluation by services like WES (World Education Services), ECE, or AACRAO.