Scientific Calculator Online

A free, full-function scientific calculator with trigonometry, logarithms, powers, roots, factorial, memory, and full keyboard support. No app, no sign-up.

DEG
 
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Quick Reference

Trigonometry

sin, cos, tan — press the function after entering the angle. Use DEG/RAD mode to switch units.

Inverse Trig

sin⁻¹, cos⁻¹, tan⁻¹ — enter a ratio (between −1 and 1 for sin/cos) to get the angle.

Powers

x² squares the number. xʸ lets you enter any power: type base, press xʸ, type exponent, press =.

Roots

√x for square root, ∛x for cube root.

Logarithms

log = base-10, ln = natural log (base e), log₂ = base-2 logarithm.

Factorial

n! — enter a positive integer and press n! (max 170).

Memory

M+ adds to memory, M− subtracts, MR recalls, MC clears.

Keyboard

0–9 digits, + − * / operators, Enter = equals, Backspace = delete, Esc = clear.

About This Scientific Calculator

Our free online scientific calculator is designed for students, engineers, teachers, and professionals who need more than basic arithmetic. It provides a full suite of mathematical functions — from trigonometry and logarithms to factorials and nth roots — all in a clean, easy-to-use interface that works on any device.

Unlike physical scientific calculators, our online version requires no batteries, no purchase, and no download. It works instantly in your browser, supports full keyboard input for fast data entry, and maintains a calculation history so you can review your recent computations.

The calculator supports both DEG (degrees) and RAD (radians) modes, making it suitable for both everyday trigonometry problems and advanced engineering calculations. Memory functions (M+, M−, MR, MC) allow you to store intermediate results and use them across multiple calculations.

For students appearing in Class 10, 11, 12, JEE, NEET, GATE, or any competitive examination in India, this scientific calculator covers all the functions available on an approved physical calculator — making it ideal for practice and quick verification of manual calculations.

Frequently Asked Questions

Does this scientific calculator work on mobile?+

Yes. The layout is fully responsive and touch-friendly. All buttons work on smartphones and tablets without any app download.

Does it support keyboard input?+

Yes. You can type digits (0–9), operators (+, −, ×, ÷), Enter for equals, Backspace to delete, and Escape to clear — just like a physical calculator.

What is the difference between DEG and RAD mode?+

DEG (degrees) and RAD (radians) are units for measuring angles. sin(90°) = 1 in DEG mode. In RAD mode, sin(π/2) = 1. Most everyday calculations use DEG mode.

How do I calculate sin, cos, tan?+

Enter the angle, then press sin, cos, or tan. Example: type 45 then press sin to get sin(45°) = 0.7071. Switch to RAD mode for radian-based calculations.

How do memory functions (M+, M−, MR, MC) work?+

M+ adds the displayed number to memory. M− subtracts it. MR recalls the stored memory value. MC clears memory to zero. Memory persists across calculations in the same session.