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Scientific Calculator

A free online scientific calculator with sin, cos, tan, inverse trig, logarithms, powers, roots, factorials and π, in degrees or radians.

Type with your keyboard too: sin(30), 2^10, 5!, sqrt(2), log(100), ln(e), π. Brackets left open close automatically; Ans is the last result.

Everything a school calculator does

The scientific calculator handles trigonometry (sin, cos, tan and their inverses) in degrees or radians, natural and base-10 logarithms, powers with ^, square roots, factorials with !, and the constants π and e. Type expressions naturally: 2π, 3(4 + 5) and sin 30 all work, and brackets left open close automatically. Like a Casio or TI calculator, −2^2 is −4, because the power is applied before the minus sign. Ans recalls your last result.

How to use it

  1. 1

    Choose DEG or RAD

    Degrees for most school geometry; radians for calculus.

  2. 2

    Enter the expression

    Use the keys or type, such as sin(45)^2 + cos(45)^2.

  3. 3

    Read the result

    It shows as you type. Press = to keep it and use Ans in the next sum.

Frequently asked questions

Why is sin(30) giving a strange answer?

Check the angle mode. sin(30) is 0.5 in degrees but −0.988 in radians.

What's the difference between log and ln?

log is base 10 (log 100 = 2); ln is the natural logarithm, base e (ln e = 1).

How do I calculate a cube root?

Use cbrt(27) or a fractional power: 27^(1/3) = 3.

Is anything sent to a server?

No. Everything is calculated in your browser, and nothing you type is stored or sent anywhere.

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