What functions does this scientific calculator support?

This calculator supports: basic arithmetic (+, -, ×, ÷, %), trigonometric functions (sin, cos, tan, asin, acos, atan), logarithms (log base 10, natural log ln), powers (x², xʸ, 10ˣ), roots (√), factorial (x!), absolute value (|x|), reciprocal (1/x), and constants (π, e). It also supports nested parentheses and proper operator precedence.

How do I switch between degrees and radians?

Click the DEG/RAD button in the top-left of the calculator to toggle between degree mode and radian mode. In DEG mode, sin(90) = 1. In RAD mode, sin(π/2) = 1. The current mode is shown in the display area.

Can I use my keyboard to type calculations?

Yes! You can type numbers (0-9), operators (+, -, *, /), parentheses, decimal point, and press Enter to calculate or Escape to clear. The calculator captures keyboard input automatically when focused on the page.

Does the calculator save my calculation history?

Yes, the calculator keeps your last 20 calculations in a scrollable history. Click "History" in the display area to view past calculations. Click any previous result to load it back into the calculator. History is kept for the current session.

Is this calculator accurate for exams and homework?

Yes, this calculator uses JavaScript's built-in Math library which provides IEEE 754 double-precision floating-point accuracy — the same precision used by most desktop scientific calculators. Results are displayed with up to 12 significant digits.

Does it support order of operations (BODMAS/PEMDAS)?

Yes, the calculator follows standard mathematical order of operations: Parentheses first, then Exponents/Powers, then Multiplication/Division (left to right), then Addition/Subtraction (left to right). This ensures correct results for complex expressions.

Can I calculate factorials?

Yes, press the x! button to enter the factorial function. For example, fact(5) = 120, fact(10) = 3628800. The calculator supports factorials up to 170! (beyond that, the result is Infinity due to floating-point limits).

Does it work on mobile phones?

Yes, the calculator is fully responsive. On mobile devices, the buttons are sized for easy touch input, and the display adapts to smaller screens. It works on all modern browsers including Chrome, Safari, Firefox, and Edge.

Scientific Calculator

Free online scientific calculator with trigonometry, logarithms, powers, factorial, and more.

Updated Mar 2026100% Private — runs in browser

DEG

Type with keyboard — numbers, operators, Enter to calculate, Esc to clear

Quick Reference

sin, cos, tanTrigonometry

sin⁻¹, cos⁻¹, tan⁻¹Inverse trig

logLog base 10

lnNatural log

x², xʸPowers

√Square root

x!Factorial

π, eConstants

1/xReciprocal

|x|Absolute value

10ˣPower of 10

DEG / RADAngle toggle

Common Formulas

Area of circleπ × r²π×5^2 = 78.54

Pythagorean theorem√(a² + b²)sqrt(3^2+4^2) = 5

Compound interestP(1 + r)ⁿ1000×(1+0.05)^10

Sine rulesin(θ)sin(30) = 0.5 (DEG mode)