About CalcHub
CalcHub builds free, accurate calculators for students and teachers. You open a page, get your answer, and learn the math behind it — no account, no paywall, no waiting.
What we stand for
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Fast answers
Every calculator runs in your browser. Results appear as you type — no server, no wait.
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Works everywhere
Built mobile-first. The calculator works on your phone, tablet, or laptop without zooming or scrolling.
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Teaches the math
Each page includes the formula, a worked example, and a plain-English guide so you understand what you calculated.
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No data collected
Your inputs never leave your device. We store nothing server-side.
Our calculators
Mean Median Mode Calculator
Mean, median, mode, quartiles, IQR, outliers — all at once
GPA Calculator
Unweighted, weighted, and cumulative GPA for high school and college
AP Score Calculator
Raw score → 1–5 for AP Lang, Chem, Bio, Gov, Lit, Spanish
TI-84 Calculator Online
Full TI-84 Plus CE — trig, logs, nCr, factorial, no download
Grade Calculator
Final exam grade needed, what-if grade, weighted average
Math Calculator
Law of sines, law of cosines, interval of convergence
How we handle accuracy
Every calculator uses published formulas from academic, government, or College Board sources. For statistical functions, we follow the standard population formula and Tukey's fence for outlier detection. For AP score conversion, we use publicly documented scoring thresholds — which the College Board adjusts slightly each year. Treat all results as educational estimates, not official calculations.
Get in touch
Found a calculation error? Have a calculator idea? Send us a note.
hello@calc-hub.info →