Scientific calculator

The scratchpad between solvers, and now a place to build a formula: name a line (m = 70), use the name in the next (U = m g h), and change it to watch everything below follow. Degrees or radians, comma decimals welcome, and the site’s 342 sourced constants one tap away.

Need a formula, not just arithmetic?

This page is a calculator. For an actual equation (physics, chemistry, trades, engineering) use the 1,930 formula solvers. Pick a formula, enter the values you know, and f^e solves for the missing one, converts the units, and shows every step. The calculator and the solvers share one history, so answers from either can be used in the other.