Calculators that show their work
Instant, accurate answers for exam scores, statistics and money, with the conversion tables, formulas and sources visible, so you can trust the number you get.
Exam score calculators
- SAT Score Calculator Turn your digital SAT raw scores into a 400–1600 estimate based on official practice tests.
- AP Calculus Score Calculator Estimate your AP Calc AB or BC score (1–5) from multiple choice and FRQ points.
- TMUA Score Calculator Convert TMUA raw marks to the 1.0–9.0 scale using published conversion tables.
- PSAT Score & National Merit Calculator Selection Index from your PSAT scores, with state Semifinalist cutoffs.
- SAT Superscore Calculator Combine your best section scores across test dates into one superscore.
- ACT Score Calculator Enhanced ACT raw scores to the 1–36 scale and your composite.
- IB Grade Calculator Total your IB Diploma points out of 45, with the official TOK/EE matrix.
- AMC 10/12 Score Calculator AMC score from correct, blank and wrong answers, with AIME cutoffs.
Grades
Math & statistics
- Scientific Calculator (CAS) Derivatives, integrals, factoring and equation solving with textbook input.
- Normal Distribution Calculator Probabilities, z-scores and percentiles with an interactive bell curve.
- Five Number Summary Calculator Min, Q1, median, Q3, max and IQR from your data, TI-84 method.
- Outlier Calculator Find outliers with the 1.5×IQR rule, fences included.
- Residual & Regression Calculator Least-squares line, correlation r, and every residual from your data.
- Binomial Distribution Calculator binompdf and binomcdf, exactly, at least, at most probabilities.
- Geometric Distribution Calculator geometpdf and geometcdf, probability the first success comes on trial k.
- Expected Value Calculator Mean and standard deviation of any discrete probability distribution.
Writing tools
- Words to Pages Converter How many pages your word count fills, by spacing, font and size.
- Reading Time Calculator How long a text takes to read at slow, average and fast speeds.
- Character & Word Counter Live character, word and sentence counts, with limits for essays and social posts.
- Words to Minutes (Speech Time) How long your speech or presentation runs at a real speaking pace.