Choose a math calculator for arithmetic, percentages, shapes or statistics. Follow the worked examples to check the method and units.
Free calculators for percentages, loans, dates, areas and unit conversions.
Calculate arithmetic expressions with parentheses, decimal numbers and percentages.
Find a percentage of a number, calculate percentage change, recover an original total, or increase and decrease a value.
Calculate the area of a rectangle, square, triangle, circle, ellipse or trapezoid, and the surface area of a sphere or closed cylinder.
Calculate geometric volume and equivalent capacity for a box, cube, cylinder, sphere or cone.
Calculate an arithmetic or weighted mean, alongside the unweighted median, minimum and maximum.
Add, subtract, multiply or divide two fractions and receive a simplified exact fraction plus an approximate decimal.
Find the principal, non-negative square root of a positive number or zero.
Calculate sine, cosine, tangent, logarithms, powers and square roots.
Learn practical mental arithmetic with decomposition, percentage shortcuts and rounding checks you can verify..
Turn a word problem into an equation by identifying the requested quantity, reference value and measurement units..
Understand pi, its approximate value and its use in circumference, area and volume calculations..
Read scientific notation and distinguish millions, billions and trillions without confusing magnitude with precision..
Read averages, risk changes, samples and charts critically before accepting a numerical claim..
Choose calculator capabilities for your task and check the exact device requirements before an exam..
Organize a multi-step calculation and check the result using units, inverse operations and sensible rounding..
English edition: 16 September 2026.