Math Calculators
Percentages, fractions, geometry, algebra, and statistics — step-by-step math calculators for school and work.
About our math calculators
These math calculators are built for the moments when you need more than an answer — you need to see how the answer was reached. Each tool states its formula up front, works a real example in the content below it, and returns intermediate values (simplified fractions, y-intercepts, variance before standard deviation) rather than a bare result, which makes them genuinely useful for checking homework and learning the method.
The collection covers arithmetic through statistics: percentages in all three phrasings (“what is X% of Y”, “X is what percent of Y”, percent change), fraction operations with automatic simplification, ratios and proportions solved by cross-multiplication, slope and line equations from two points, the Pythagorean theorem, circle, area, and volume for every common shape, LCM and GCF via prime factorization and the Euclidean algorithm, and mean, median, mode, and standard deviation for data sets you paste straight in.
Students use these to verify work before submitting; professionals use them for the geometry and statistics that show up in real projects — square footage, material volumes, margins of error. Either way, the method is always visible.