Is it safe? It does not use eval.

Correct. Expressions are parsed by a dedicated tokenizer, never executed as code.

Does it work on mobile?

Yes. Big touch-friendly buttons and a responsive layout work on any phone.

Scientific Calculator

Full scientific calculator with trig and logs

DegreesTip: you can type with your keyboard

Scientific functions use degrees; toggle with the DEG key. Factorial works for whole numbers from 0 to 170. Everything runs in your browser; nothing is sent or stored.

About this tool

Homework, engineering estimates and quick science math all need more than basic arithmetic. This scientific calculator covers trigonometry, logarithms, exponents and more.

Expressions are evaluated by a real math parser, never eval, so it is both accurate and safe. Free, instant, and private.