Scientific Calculator

Free online scientific calculator with sin, cos, tan, logarithms, powers, roots, factorials, π and e. Degrees or radians, keyboard input and history.

How to use the scientific calculator

  1. Type a calculation or build it with the keys, for example sin(30) + 2^3 or √(2) × π. The result appears as you type.
  2. Choose Deg or Rad to set whether angles are in degrees or radians.
  3. Press = or Enter to keep the result. Ans puts the last result into your next calculation.
  4. Press Inv to switch keys to their inverse functions: sin⁻¹, cos⁻¹, tan⁻¹, eˣ, 10ˣ, ∛, x³ and the y-th root.

Supported functions

  • Trigonometry: sin, cos, tan, their inverses asin, acos, atan, and the hyperbolic sinh, cosh, tanh.
  • Logarithms: ln (natural, base e), log (base 10) and log2 (base 2).
  • Powers and roots: x^y, x², √, cbrt (cube root) and exp.
  • Other: factorial n!, absolute value abs, percent %, the constants π and e, and scientific notation with EXP, as in 6.02E23.

You can leave out multiplication signs: 2π, 3(4 + 1) and 2sin(30) all work. Powers are worked out from right to left, so 2^3^2 = 2⁹ = 512, and a minus sign in front applies after the power, so -3^2 = −9.

FAQ

Why is sin(30) not 0.5?

The calculator is in radians mode, where 30 means 30 radians. Switch to Deg to work in degrees.

Why do I get an error?

The calculation may have a missing number or an extra parenthesis, or the answer is undefined, such as dividing by zero, tan(90°) or the logarithm of a negative number. A missing closing parenthesis at the end is added for you.

How accurate are the results?

Calculations use double-precision numbers (about 15–17 significant digits), and results are shown rounded to 12 significant digits. Factorials work up to 170!.