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GPA

Methodology & GPA formula basis

Educational orientation only — not an official transcript GPA. Schools and colleges set policy and may recalculate. Not affiliated with College Board, Common App, or any school district.

Policy: research formulas before volume

Calculators ship when their method maps to (1) a published 4.0 orientation table, (2) common U.S. high-school weighted practices, (3) standard credit-weighted arithmetic, or (4) a clearly labeled educational conversion (Tier D) that does not claim credential-evaluation authority.

We do not invent scoring systems solely for SEO volume. Flagship tools: High School GPA Calculator (4.0), Weighted GPA, Cumulative GPA, Target GPA Planner.

Engine registry coverage: 10/10 compute engines have literature rows.

Evidence tiers

  • A — Published orientation scales and standard letter/percent → 4.0 mappings (e.g. College Board BigFuture style tables)
  • B — Common admissions / district practice (Honors/AP/IB weight patterns, core-course emphasis, NACAC-style academic context)
  • C — Standard arithmetic (credit-weighted means, cumulative roll-forward, target/projected GPA algebra)
  • D — Educational heuristics (linear scale conversion) — explicitly not WES/NACES or official evaluation

Core engines at a glance

  • unweightedGpa / letterToGpa — Σ(grade points × credits) ÷ Σ(credits) on a 4.0 letter table
  • weightedGpa — same mean after common boosts (+0.5 Honors, +1.0 AP/IB/dual; optional 5.0 cap)
  • percentToGpa — percent bands → points (orientation table), then credit-weighted average
  • cumulativeGpa / semesterGpa — term window vs running (priorGPA × priorCredits + new QP) ÷ total credits
  • targetGpaPlanner / projectedGpa — required future average and multi-term what-if projections
  • coreGpa — unweighted average limited to core academic subjects
  • scaleConvert — linear educational map between numeric scales (rough estimate only)

Tier A — widely published scale / table

Tier B — common district or admission practice

Tier C — standard arithmetic identity

  • Running cumulative GPA from prior GPA + new quality points

    Engine id: cumulativeGpa

    cumulativeGPA = (priorGPA × priorCredits + newTermQualityPoints) ÷ (priorCredits + newTermCredits).

    Scope: Multi-term cumulative average when you know prior GPA/credits and new term totals.

    Limits: District plus/minus cutoffs and credit definitions differ. Not an official transcript GPA. Colleges may recalculate using their own rules.

  • Single-term credit-weighted GPA

    Engine id: semesterGpa

    Same unweighted credit-weighted mean restricted to one semester’s courses.

    Scope: Semester or marking-period GPA windows.

    Limits: District plus/minus cutoffs and credit definitions differ. Not an official transcript GPA. Colleges may recalculate using their own rules.

  • Required future average to hit a target cumulative GPA

    Engine id: targetGpaPlanner

    requiredFutureGPA = (targetGPA × (currentCredits + futureCredits) − currentGPA × currentCredits) ÷ futureCredits. Compare to scale maximum.

    Scope: Planning tool for remaining high-school credits.

    Limits: District plus/minus cutoffs and credit definitions differ. Not an official transcript GPA. Colleges may recalculate using their own rules. Ignores pass/fail, repeated-course policies, and mid-term withdrawals.

  • Forward projection from expected term averages

    Engine id: projectedGpa

    projectedGPA = (currentGPA × currentCredits + expectedAvg × expectedCredits × terms) ÷ (currentCredits + expectedCredits × terms).

    Scope: What-if planning if expected grades hold for remaining terms.

    Limits: District plus/minus cutoffs and credit definitions differ. Not an official transcript GPA. Colleges may recalculate using their own rules. Not a prediction market — outcomes depend on actual grades earned.

Tier D — educational heuristic

Citation library (unique URLs)

Quality controls

  • Unit tests for core engines (unweighted, weighted, cumulative, target planner, percent/letter maps)
  • Quality gate requires literature mapping for every engine id used in the catalog
  • Tier D tools must not be described as official credential evaluations
  • Every tool page includes a Literature & evidence basis box + sources list

Related: Academic review · Editorial policy · Guides