Math & Tools

Everyday math utilities and converters — percentages, areas, unit conversions, and more.

Basic Calculator

A simple everyday calculator — add, subtract, multiply, divide, and use parentheses with full keyboard support.

Calculate percentages, percentage change, and "what percent of" problems in one tool.

Calculate area and volume for common shapes — rectangles, circles, triangles, cylinders, spheres, and cones.

Convert between common units of length, weight, temperature, volume, and speed.

Convert times between major world time zones and find the best meeting time across locations.

Generate random numbers, pick from a range, roll dice, or flip coins with true randomness.