Omnibus

Scientific Calculator

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  • 100% Free
  • No Sign-Up
  • No Credit Card
  • No Free Trial
  • No Pro Tier
  • No Watermarks

Nothing is uploaded. Just open it and start.

A scientific calculator that runs entirely in your browser

Evaluate expressions with trigonometry, logarithms, powers, roots, and factorials — switch between degrees and radians, keep a running memory, and reuse your last answer. No sign-up, no download, and nothing uploaded to a server.

Full function set

Trig, inverse trig, logs, exp, roots, powers, factorials, modulo, π and e — the whole scientific bench.

Degrees or radians

Switch angle mode with one tap; trig and inverse-trig functions follow it consistently.

Keyboard friendly

Type expressions and operators, press Enter to evaluate, Escape to clear — no reaching for the mouse.

100% private

A safe parser runs everything in your browser. No eval, no uploads, nothing tracked.

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Frequently asked questions

Which functions does the scientific calculator support?
Trigonometry (sin, cos, tan and their inverses asin, acos, atan), natural and base-10 logarithms (ln, log), the exponential exp, square root (sqrt), absolute value (abs), powers with ^, factorials with !, modulo with %, and the constants π and e.
What is the difference between degree and radian mode?
Trigonometric functions interpret their input as either degrees or radians. In degree mode sin(90) is 1; in radian mode you would write sin(π/2) to get 1. Use the Deg/Rad switch at the top to pick the mode — inverse functions like asin return their answer in the same unit.
What order of operations does it follow?
Standard mathematical precedence: factorials and powers first (^ is right-associative, so 2^3^2 is 2^9), then multiplication, division and modulo, then addition and subtraction. Use parentheses to group anything you want evaluated first — for example (2+3)*4 is 20, while 2+3*4 is 14.
Can I use my keyboard?
Yes. Type digits and the operators + − * / ^ % ! and parentheses directly, press Enter or = to evaluate, Backspace to delete the last character, and Escape to clear. The on-screen keypad and your physical keyboard stay in sync.
Is there memory and a last-answer button?
Yes. M+ and M− add or subtract the current value to a memory register, MR recalls it, and MC clears it (an M badge appears while memory holds a value). Ans inserts your last result, and after pressing = an operator continues the calculation from that result.
Is my data stored or uploaded anywhere?
No. Every calculation runs locally in your browser using a safe expression evaluator — there is no eval, no server round-trip, and nothing is uploaded. Your last expression is saved only to this browser's local storage for convenience.
Is the scientific calculator really free?
Yes — nothing to pay, nothing to register for, no watermark. The only revenue here is one modest ad slot on the page.
Do I need to create an account?
No. There's no account system at all. Open the page and start calculating.