Online Scientific Calculator
Free scientific calculator with trigonometric functions, logarithms and powers.
Tip: Switch between DEG (degrees) and RAD (radians) as needed — trigonometry uses both.
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About this digital tool
This online scientific calculator lets you type a full expression with brackets and calculate it with one press. Besides the four operations, it supports powers (^), square roots (√), logarithms (log and ln), the trigonometric functions sin, cos, tan and the constants π and e. No installation is needed: it works directly in the browser, on phone and computer.
The calculator respects the order of operations: brackets, then powers, then multiplication and division, finally addition and subtraction. For example, 2 + 3 × 4 gives 14, while sqrt(144) + 2^3 gives 12 + 8 = 20. Trigonometric functions calculate in radians, so sin(pi/2) = 1. It suits school homework, students and quick calculations at work.
How to use
- Enter the mathematical expression using the buttons or keyboard.
- Switch between DEG/RAD for trigonometric functions.
- Press = or Enter to see the result.
Frequently asked questions
Does it support trigonometric functions?
Yes — sin, cos, tan, plus the inverses (arcsin, arccos, arctan). Switch between degrees and radians as needed.
How do I write a power?
Use the xⁿ button or type ^ (e.g. 2^10 = 1024). For a square: x². For a square root: √.
Do sin, cos and tan work in degrees or radians?
In radians. To calculate in degrees, multiply the angle by π and divide by 180. E.g. sin(30°) is written as sin(30 × pi / 180) and gives 0.5.
Does the calculator respect the order of operations?
Yes. Multiplication and division are done before addition and subtraction, while brackets take full priority. So 2 + 3 × 4 = 14, while (2 + 3) × 4 = 20.