Scientific Calculator
A full scientific calculator with trig, logs, powers, roots and constants — free and online.
About this calculator
A scientific calculator handles everything a basic calculator does plus trigonometry (sin, cos, tan and their inverses), logarithms, exponents, roots, factorials and the constants π and e. Type a full expression like sin(45)^2 + log(1000) and it respects the correct order of operations. Switch between degrees and radians for trig.
Frequently asked questions
How do I use degrees instead of radians?
Use the DEG/RAD toggle. In DEG mode, sin(90) gives 1; in RAD mode, sin(π/2) gives 1. The mode applies to all trigonometric functions.
Does it follow order of operations?
Yes. It parses the whole expression and applies standard precedence — parentheses, then exponents, then multiplication and division, then addition and subtraction.
What functions are supported?
sin, cos, tan and inverses, sinh/cosh/tanh, log (base 10), ln, log2, sqrt, cbrt, exp, abs, factorial, and constants π, e and τ.
Results are estimates for general guidance only, not financial, medical or tax advice.