How to use the Scientific Calculator
- Click the buttons or type an expression, like
2^10 + sqrt(16). - Press = or Enter to calculate.
- Switch between degrees and radians for trigonometry.
- Click any line in the history to reuse it; Ans inserts the last result.
What it can calculate
- Arithmetic with the usual order of operations:
2 + 3 × 4 = 14. - Powers and roots:
2^10,x²,sqrt(2). - Trigonometry in degrees or radians:
sin(30) = 0.5in degrees, and the inverse functions. - Logarithms:
ln(base e) andlog(base 10). - Factorials (
5! = 120), percentages (50%= 0.5), π and e.
Implicit multiplication works too — 2π or 3(4+1). Results are rounded to 12 significant digits to hide floating-point noise like 0.1 + 0.2.
Working with fractions? Use the Fraction Calculator. For statistics on a list of numbers, the Standard Deviation Calculator. Converting between binary and hex? See the Number Base Converter.
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Tools that pair well with the Scientific Calculator
- Unit Converter — Convert between metric, imperial and technical units in ten categories — with a two-way converter and a table of every unit at once.
- Roman Numeral Converter — Convert any number from 1 to 3,999,999 into Roman numerals — or read Roman numerals back as numbers — with a breakdown of every symbol.
- Number to Words Converter — Spell out any number in words — “one thousand two hundred thirty-four” — as a cardinal, an ordinal (“twenty-first”) or a check amount (“One thousand two hundred and 50/100 dollars”).
- Possibility & Combination Calculator — How many possibilities are there?
Frequently asked questions
How do I switch between degrees and radians?
Use the Deg / Rad switch above the keypad. It applies to sin, cos, tan and their inverses.
Can I type instead of clicking?
Yes. Type into the display — numbers, + − * / ^ ( ), function names like sin or sqrt — and press Enter.
Is the calculation done on a server?
No. Everything is calculated in your browser, and the history is saved on this device only.
Can I install Scientific Calculator as a web app and use it offline?
Yes. Scientific Calculator is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.