Scientific Calculator

Advanced scientific calculator with trigonometry, logarithms, powers, roots, and constants.

How to use the Scientific Calculator

Tap numbers and operators as you would on a handheld calculator.
Use brackets to control the order of operations.
Switch between DEG and RAD before using sin, cos or tan.
Press = to evaluate; use C or AC to clear.

How expressions are evaluated

Order of operations: Brackets → Powers/Roots → × and ÷ → + and −

Worked example

Examples

2 + 3 × 4 = 14 (not 20, because multiplication comes first)

sin(30) in DEG mode = 0.5

log(1000) = 3 ln(e) = 1

5! = 120 √144 = 12 2¹⁰ = 1024

Degrees vs radians

Trigonometric functions depend on the angle unit. 180° equals π radians, so sin(90) is 1 in degree mode but about 0.894 in radian mode. School geometry problems usually use degrees; calculus and physics formulas usually use radians. Most wrong trig answers come from being in the wrong mode.

Common functions

log — base-10 logarithm; ln — natural logarithm (base e ≈ 2.718)
x^y — powers; √ — square root
n! — factorial, the product of all positive integers up to n
π ≈ 3.14159 and e ≈ 2.71828 as constants

Tips for accurate results

Use brackets generously when typing long expressions.
For percentages of a number, the percentage calculator is quicker.
Very large factorials (above 170!) exceed what a browser can display.

Frequently Asked Questions

Yes, it covers the functions found on standard school and college scientific calculators.

Check whether you are in DEG or RAD mode.

Once the page has loaded, calculations run in your browser without sending data anywhere.

Content reviewed by Vinod, Easy Smart Calculator · Last updated October 2026