Productivity & Lifestyle / Math, made easy.
Math & Statistics
Mean / median / mode / SD, percentage change, Pythagorean triangle, 3D volume, GPA, APR↔APY — answers the r/statistics, r/learnmath, r/datascience, and r/finance 'how do I calculate this' threads.
6 tools available
Statistics Calculator
Compute mean, median, mode, range, variance, and standard deviation for any dataset.
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Percentage Change Calculator
See the percent change between any two numbers (with direction).
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Triangle Calculator (Sides / Area / Angles)
Solve any triangle given 3 known sides or 2 sides + 1 angle (Law of Cosines / Sines).
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3D Volume & Surface Area Calculator
Compute volume and surface area for spheres, cubes, cylinders, cones, and pyramids.
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GPA Calculator (Weighted & Unweighted)
Compute weighted and unweighted GPA on a 4.0 / 4.5 / 5.0 scale.
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APR ↔ APY Converter
Convert between APR and APY for any compounding frequency.
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