All-in-one calculators and converters with flexible units and interactive features
Basic arithmetic: +, -, *, /, parentheses.
Trig, log, powers, roots, constants π and e.
Height in cm or ft/in, Weight in kg or lb. Shows BMI and category.
Convert mm, cm, m, km, in, ft, mi.
Convert g, kg, lb, oz.
Convert ml, l, cup, gallon.
Convert Celsius, Fahrenheit, Kelvin.
Convert seconds, minutes, hours, days.
Calculate (part ÷ total) × 100%
Approximate conversions between US, EU, and UK sizes.
Click beads to count numbers.
Click numbers to score points. Reset to start new game.
Enter patio dimensions and tile size to calculate number of tiles. Preview grid.
Enter a number to see its binary, hexadecimal, and octal equivalents.