Scientific Calculator
An online scientific calculator with trigonometry in degrees or radians, powers, roots, logarithms and factorials.
Scientific calculator
Filled in with example values. Replace them with your own.
Results update as you type.
Result
2 sin(30) + √(16) = 5
Result
5
Press = or Enter to keep a result; it becomes Ans for the next calculation. Results show up to 12 significant digits. Powers bind tighter than a minus sign: −2^2 = −4.
How the scientific calculator works
Type an expression or build it with the keypad; the result updates as you type. Press = or Enter to keep it: it goes into the recent list and becomes Ans for your next calculation.
The calculator follows the standard order of operations: brackets, then factorials and powers, then multiplication and division, then addition and subtraction. Powers group from the right, so 2^3^2 = 2^9 = 512.
Functions
sin, cos, tan, asin, acos, atan
√ (sqrt), ∛ (cbrt), x^y, x!
ln (base e), log (base 10), log2, exp
|x| (abs), π, e, Ans
Worked examples
- 2 sin(30) + √(16) in degrees: 2 × 0.5 + 4 = 5.
- log(1000) = 3, because 10³ = 1000.
- 5! = 5 × 4 × 3 × 2 × 1 = 120.
- sin(π/6) in radians = 0.5.
Notes
- Results are real numbers; square roots of negative numbers and logarithms of 0 or less give an error.
- Factorials work for whole numbers up to 170!.
- Results show up to 12 significant digits; very large or small numbers are written with powers of ten.
Frequently asked questions
Degrees or radians?
Choose degrees for everyday angles (a right angle is 90°) and radians for most maths and physics formulas (a right angle is π/2). The setting changes sin, cos and tan and their inverses.
Why is −2^2 equal to −4?
In standard notation the power is worked out before the minus sign, so −2^2 means −(2^2). Write (−2)^2 to get 4.
Can I type instead of using the keypad?
Yes. Type * or × for multiply, / or ÷ for divide, ^ for powers, ! for factorials, and names such as sin, sqrt, ln, log, pi and e. 2π and 3(4 + 1) multiply without a sign.
Why does 0.1 + 0.2 show 0.3?
Computers store most decimals in binary, so the raw result is 0.30000000000000004. The calculator shows up to 12 significant digits, which hides that tiny error without affecting real answers.