Scientific Calculator

A free calculator you can tap or type on, with a basic mode and a scientific mode. Use brackets, powers, roots, trigonometry in degrees or radians, logarithms, factorials and percent, with a history of your last calculations.

You can also type: use + − * / ^ ( ) and names like sin, cos, sqrt, pi. Press Enter for the answer. 50% means 0.5, and 2(3+4) means 2 × (3+4).

Calculated instantly in your browser with standard formulas. Double-check anything important. Full disclaimer and terms of use.

What this calculator can do

Basic maths: add, subtract, multiply, divide, brackets and percent.
Powers and roots: x², x^y, square root, reciprocal (1/x) and absolute value.
Trigonometry: sin, cos, tan and their inverses, in degrees or radians.
Logarithms and constants: ln, log (base 10), π and e.
Factorials (n!, up to 170) and the previous answer (Ans).

Order of operations

The calculator follows the usual order, sometimes remembered as BEDMAS or PEMDAS: brackets first, then exponents, then multiplication and division from left to right, then addition and subtraction from left to right. Powers are worked out from right to left, so 2^3^2 means 2^(3^2) = 512, and −2^2 is −4.

Examples to try

Type	Result
2+3*4	14
(2+3)*4	20
2(3+4)	14
sin(30) in Deg	0.5
cos(pi) in Rad	-1
ln(e)	1
log(1000)	3
5!	120
sqrt(144)	12
200*15%	30

Degrees and radians

Angles can be measured in degrees (a full turn is 360) or radians (a full turn is 2π). Use Deg for everyday geometry, where sin(30) is 0.5, and Rad for most calculus, physics and programming, where sin(π/2) is 1. The switch changes sin, cos, tan and the inverse functions.

Tips and limits

You can type with your keyboard: use + − * / ^ ( ) and names such as sin, cos, sqrt and pi, then press Enter.
A number followed by a bracket or function is multiplied, so 2(3+4) is 14 and 3sin(30) is 1.5.
Results show up to 12 significant digits, so 0.1 + 0.2 shows as 0.3.
The calculator tells you about errors, such as dividing by zero, a missing bracket or the log of a number that is not above 0.

How to use the Scientific Calculator tool

Choose Basic or Scientific, and Deg or Rad for angles.
Tap the keys or type the calculation with your keyboard. The answer appears as you type.
Press = or Enter to keep the result, and use Ans to use it in the next calculation.
Tap an item in the history to bring a past calculation back.

Frequently asked questions

How do I use the scientific calculator?

Type or tap the calculation, for example 2(3+4)^2 or sin(30), and the answer shows under the display. Press = or Enter to keep it. Brackets, powers, roots, logs and trig functions are in Scientific mode.

What order does it calculate in?

It follows the usual order of operations: brackets first, then powers, then multiplication and division, then addition and subtraction. So 2+3×4 is 14, and 2^3^2 is 2^(3^2) = 512.

Should I use degrees or radians?

Use degrees for everyday angles such as sin(30) = 0.5, and radians for most calculus and physics, where sin(π/2) = 1. The Deg and Rad switch changes sin, cos, tan and their inverses.

How does the percent key work?

A number followed by % is divided by 100, so 50% is 0.5 and 200×15% is 30.

Why does it show an error?

The calculator tells you what went wrong, such as dividing by zero, a missing bracket, taking the log of a number that is not above 0, or an inverse sine of a value outside −1 to 1.