Scientific calculator
Free online scientific calculator: sin, cos, tan, logarithms, roots, powers and factorials in degrees or radians, with exact results and a history of your sums.
How to use the scientific calculator
- Type a calculation or tap the keys below, for example 2 × sin(30) + √16.
- The result appears as you type; press Enter or = to keep it.
- Tap a line in the history to bring that calculation back and edit it.
Frequently asked questions
Degrees (DEG) by default, like a school pocket calculator. Switch to radians (RAD) with the "Angle unit" buttons above the keys.
By the usual rules of maths the power comes before the minus sign: -2^2 = -(2^2) = -4. To square a negative number, write (-2)^2 = 4.
Yes. Adding, subtracting, multiplying and dividing decimals gives exact answers (0.1 + 0.2 = 0.3), and big whole numbers such as 20! show every digit. Functions like sin and log are rounded to 15 significant digits.
Yes. Type the calculation, press Enter to work it out and Esc to clear. Shortcuts such as sin30, 2π or 3(4+1) work too.
It is completely free and needs no sign-up.
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