Scientific Calculator
A free online scientific calculator with trigonometry, logarithms, powers, roots, factorials, and constants. Works on any device.
Tip: trig functions use the selected Degrees/Radians mode. Use xʸ for powers, n! for factorial, and % to divide by 100.
How to use this calculator
Build an expression with the buttons and press = to evaluate it. Use sin, cos, tan (and their inverses), ln and log, √ and xʸ for roots and powers, plus π and e. Switch between Degrees and Radians for trigonometry, ⌫ to delete, and C to clear.
What a scientific calculator does
Beyond basic arithmetic, a scientific calculator handles exponents, roots, logarithms, trigonometric functions, and constants — the tools you need for algebra, geometry, physics, chemistry, and engineering. This one parses your whole expression and applies the correct order of operations.
Examples
sin(30) = 0.5 (in degrees) · 2 xʸ 10 = 1024 · √(144) = 12 · log(1000) = 3 · 5! = 120 · (3 + 4) × 2 = 14
Order of operations
Calculations follow PEMDAS: parentheses first, then exponents, then multiplication and division, and finally addition and subtraction. Use parentheses whenever you want to control the order explicitly.
Frequently asked questions
Is this scientific calculator free?
Yes. It's completely free, works in your browser, and requires no download or sign‑up. Everything is calculated on your device.
How do I calculate sine, cosine, and tangent?
Tap the function (sin, cos, or tan), enter the angle, and close the parenthesis. Use the Degrees/Radians toggle to match your angle units — most everyday problems use degrees.
How do I raise a number to a power?
Use the xʸ button for any exponent (e.g. 2 xʸ 10 = 1024) or x² for squaring. The calculator follows standard order of operations.
What does the % button do?
It divides the preceding value by 100. So 50 % becomes 0.5, which is handy inside larger expressions.
Does it follow order of operations?
Yes. It respects PEMDAS/BODMAS — parentheses, exponents, multiplication and division, then addition and subtraction — so expressions evaluate the way they should.