100% Free · Private · No sign-up

Scientific Calculator

A full online scientific calculator with sin, cos, tan, log & ln, powers, square roots, factorial and π — switch between degrees and radians instantly.

Uzetool SC‑100 · Scientific
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Three simple steps

How to use this scientific calculator online

Evaluate trig, logs, powers and more — right in your browser.

  1. 1

    Set DEG or RAD

    Choose degrees for geometry and schoolwork, or radians for calculus and physics.

  2. 2

    Build your expression

    Tap buttons or use your keyboard. Nest functions like sin(30)+log(100) or 2^10.

  3. 3

    Press =

    Get an instant result, copy it with one click, or reopen past calculations from history.

Everything you need

A scientific calculator that works anywhere

Full math functions, keyboard support, and zero installs.

Trigonometry

sin, cos, tan plus inverse functions — with a clear DEG/RAD toggle.

Logarithms

Common log (base 10) and natural ln for science, finance and engineering.

Powers & roots

Squares, arbitrary powers with x^y, square roots and absolute value.

Factorial & constants

Compute n! for integers and insert π or e with one tap.

Keyboard friendly

Type expressions naturally — Enter to solve, Backspace to edit.

100% private

Every calculation runs locally. Nothing is uploaded or stored on a server.

Free online scientific calculator for students, engineers and everyday math

Need a scientific calculator online without installing an app? This free tool gives you the functions you expect from a handheld calculator — trigonometry, logarithms, exponents, square roots, factorials and the constants π (pi) and e — in a clean, fast interface that works on desktop, tablet and phone.

Trigonometry in degrees or radians

Toggle DEG when you want sin(30) to mean 30 degrees (result 0.5), or switch to RAD for radian-based math. Inverse functions (asin, acos, atan) return results in the same unit mode. This matches how most school and university courses expect a trig calculator to behave.

Log, ln, powers and factorial

Use log for base-10 logarithms — handy for decibels, pH and orders of magnitude. Use ln for natural logs in growth models and calculus. The x^y button handles exponents (e.g. 2^16 = 65536), while n! computes factorials for combinatorics (5! = 120).

Who is this calculator for?

Whether you are studying algebra, physics, engineering, finance or just need a capable math calculator for work, this page loads instantly with no account required. It is ideal when your phone battery is low, your OS calculator lacks scientific mode, or you want a large-screen keypad with readable results.

Because everything runs in your browser, your expressions stay on your device. There is nothing to download, and the tool keeps working offline once the page has loaded. Explore more free utilities on Uzetool, including our percentage calculator, loan calculator and unit converter.

Questions

Frequently asked questions

What functions does this scientific calculator support?

Trigonometry (sin, cos, tan, asin, acos, atan), log (base 10), ln (natural log), square root, powers, factorial, π, e, absolute value, parentheses and standard arithmetic.

Can I use degrees instead of radians?

Yes. Tap DEG/RAD at the top of the keypad. In DEG mode, sin(30) returns 0.5. In RAD mode, angles are interpreted in radians.

Does it work with a keyboard?

Yes. Type numbers and operators, press Enter or = to calculate, Backspace to delete and Escape to clear. ^ and ! work for powers and factorial.

What is the difference between log and ln?

log is base-10 (common logarithm). ln is the natural logarithm (base e). Use log for pH and decibels; use ln for exponential growth and calculus.

Is this scientific calculator free and private?

Yes — 100% free with no sign-up, and every calculation runs locally in your browser. Your expressions are never uploaded to a server.