Online scientific calculator

Trigonometry in degrees or radians, logarithms, powers, roots and factorials. With history and keyboard support.

How it works

Type the whole expression and the calculator follows the order of operations: brackets first, then powers, then multiplication and division, and finally addition and subtraction.

Trig functions use degrees or radians depending on the Deg/Rad switch. 2nd gives the inverses (arcsine, arccosine and arctangent). Ans brings back the last result.

Frequently asked questions

How do I enter a power?

With the xʸ key or the ^ sign on your keyboard: 2^10 gives 1,024. There’s also an x² key.

What’s the difference between log and ln?

log is the base-10 logarithm (log 1000 = 3) and ln is the natural logarithm, base e (ln e = 1).

Why isn’t sin(180) zero in radians?

Because in radians 180 means 180 radians, not 180 degrees. Switch to Deg, or type sin(π) in radians.

More maths calculators

Percentages — X% of an amount, what percentage, increases, decreases and change.
Rule of three — Direct and inverse proportion, with the working.
Fractions — Add, subtract, multiply, divide and simplify fractions.
Powers, roots and logarithms — Any exponent, nth root and logarithm in any base.
Equations — Linear, quadratic and systems of two equations.
Mean, median and mode — Mean, median, mode, range, variance and standard deviation of a list.
GCD and LCM — Greatest common divisor, least common multiple and prime factors.
Area and perimeter — Square, rectangle, triangle, circle, trapezoid, rhombus and polygons.
Roman numerals — Convert numbers to Roman numerals and back.
Random numbers — Random numbers between two values, with or without repeats.