Scientific Calculator

A full scientific calculator in your browser: trigonometry in degrees or radians, logarithms, exponents, roots and factorials. Type with your keyboard or tap the keys.

 
History

    What the keys do

    KeyMeaningExample
    sin, cos, tanTrig functions of an anglesin(30) = 0.5 (DEG)
    sin⁻¹, cos⁻¹, tan⁻¹Inverse trig: the angle for a ratiotan⁻¹(1) = 45
    logBase-10 logarithmlog(100) = 2
    lnNatural logarithm (base e)ln(e²) = 2
    xʸ, x²Powers2^10 = 1024
    √, ∛Square and cube roots√(144) = 12
    x!Factorial6! = 720
    eˣ, 10ˣExponentials10^3 = 1000
    AnsThe previous answerAns × 2

    Order of operations

    The calculator reads the whole expression and applies the standard order: brackets, then powers (right to left, so 2^3^2 = 2^9 = 512), then multiplication and division, then addition and subtraction. A minus sign in front binds more loosely than a power, so −2² = −4. Write (−2)² if you mean 4.

    Degrees or radians?

    Geometry, navigation and most high school problems use degrees, where a full turn is 360°. Calculus, physics and programming usually use radians, where a full turn is 2π. If a trig answer looks wrong, the angle mode is the first thing to check. To convert, multiply degrees by π/180.

    Tips for accurate answers

    • Use brackets generously: sin(30)^2 squares the sine, while sin(30^2) takes the sine of 900°.
    • Keep full precision until the end. Use Ans instead of retyping a rounded answer.
    • Watch the domain: square roots and logs of negative numbers have no real answer.

    Solving triangles? Try the triangle calculator or trigonometry calculator. For everyday sums, the basic calculator is quicker.

    Last reviewed October 2026.

    Frequently asked questions

    How do I switch between degrees and radians?

    Use the DEG / RAD switch at the top of the display. In DEG mode sin(30) = 0.5. In RAD mode the same angle is written as sin(π/6). Inverse functions like sin⁻¹ return answers in the unit you have selected.

    What is the difference between log and ln?

    log is the common logarithm, base 10, so log(1000) = 3. ln is the natural logarithm, base e (about 2.71828), so ln(e) = 1. For any other base, divide: log base 2 of 8 = ln(8) ÷ ln(2) = 3, or use the log calculator.

    Why does tan(90) show an error?

    The tangent of 90° (or π/2 radians) is undefined because it would mean dividing by cos(90°) = 0. Many calculators show a huge number caused by rounding; this one tells you the value is undefined instead.

    Can I type functions instead of pressing buttons?

    Yes. Type sin(, cos(, tan(, asin(, ln(, log(, sqrt( and so on, or use ^ for powers and ! for factorials. You can also write pi and e. Implicit multiplication works too, so 2pi and 3(4+1) are understood.

    How large a factorial can it handle?

    Factorials work for whole numbers up to 170!, which is about 7.26 × 10³⁰⁶. Anything larger is beyond the range of standard double-precision numbers and shows as infinity.