Scientific Calculator

About the Scientific Calculator

A free online scientific calculator that runs entirely in your browser. It supports trigonometry (sin, cos, tan and their inverses), logarithms (ln, log), powers and roots, factorials, percentages, the constants π and e, and a full memory (MC/MR/M+/M−). Switch between degrees and radians with the DEG/RAD toggle.

Tips

Use inv to reach inverse functions (sin⁻¹, eˣ, 10ˣ).

Ans inserts your previous result so you can chain calculations.

You can also type directly with your keyboard; press Enter to evaluate.

Percentages are postfix — 200×5% gives 10.

About Scientific Calculator

A full scientific calculator for trigonometry, logarithms, powers, roots, and factorials, with degree/radian modes and memory. It safely evaluates whole expressions with correct operator precedence.

How to Use

Type or click an expression using the keypad.
Toggle DEG/RAD for trigonometric functions.
Use inv for inverse functions (sin⁻¹, eˣ, 10ˣ) and the memory keys as needed.
Press = to evaluate; use Ans to reuse the previous result.

Why Use This Tool?

Accurate — built on precise, well-tested mathematical formulas.
Instant — all calculations happen client-side for zero latency.
Private — no data is sent to any server; your information stays on your device.
Free — no sign-up, no limits, no hidden costs.

Frequently Asked Questions

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

Yes. Expressions are parsed with correct precedence — exponents before multiplication/division before addition/subtraction — and parentheses override the order, so 2 + 3 × 4 correctly gives 14.

What is the difference between degrees and radians mode?

It changes how trigonometric functions interpret angles. In DEG, sin(30) = 0.5; in RAD, sin(π/2) = 1. Use the DEG/RAD toggle to switch.

How do I calculate a factorial or power?

Use the x! key for factorials (5! = 120) and the xʸ (or ^) key for powers (2^10 = 1024). The √ key and x² are also available.