Free tools

Free GPA calculator

No signup. No ads. No data leaves your browser. Built by ExamExplained for AP, NY-REGENTS and TX-STAAR students.

Enter your course grades and levels (Regular, Honors, AP/IB) to get your weighted and unweighted GPA on the 4.0 scale.

Subject calculators

Projectile motion, circular motion, gravitation, waves, electromagnetism, and quantum/atomic — every key formula as a quick calculator.

pH and pOH, weak-acid and buffer pH, equilibrium constant, Ksp, dilution, titration, mole conversion, Beer-Lambert and calorimetry.

Punnett squares, sex-linked inheritance, Hardy-Weinberg equilibrium, and population-growth calculators.

Work out the exact mark you need on your final exam to hit your target overall grade.

These are free study estimators, not official tools. For official admissions information and entry requirements, see College Board.