Calculator
A fast keyboard-friendly calculator with a running history tape you can reuse.
How to use
Type a calculation using your keyboard or the on-screen keypad, then press Enter (or the Equals button) to evaluate it. The calculator follows standard order of operations — multiplication and division before addition and subtraction — and you can use parentheses to group terms exactly the way you mean them.
Every result is added to the history tape on the right. Click any entry to drop its result back into the input and keep working from it — handy for multi-step calculations where each answer feeds the next. Press Escape to clear the current entry, or Backspace to delete the last character.
Nothing you type is sent anywhere: the calculator runs entirely in your browser, so it works offline and keeps your numbers private. Use the Share button to copy a link that pre-fills the current expression, or Copy to grab the result.
Examples
Enter 2 + 3 * 4 and the calculator returns 14, not 20 — multiplication is applied before addition.
Enter (2 + 3) * 4 to force the addition first and get 20.
Calculate 19.99 * 3, then click the tape entry to reuse 59.97 in your next calculation — e.g. add tax.
Frequently asked questions
Is the calculator free and private?
Yes. It runs 100% in your browser, with no sign-up and no data leaving your device. It even works offline once the page has loaded.
Does it follow order of operations (PEMDAS/BODMAS)?
Yes. It evaluates parentheses, then exponents, then multiplication and division, then addition and subtraction, just like standard math.
Can I use my keyboard?
Absolutely. Type digits and operators directly, press Enter to evaluate, Backspace to delete, and Escape to clear.
What is the history tape for?
It records each calculation and its result. Click any entry to reuse that result in a new calculation — useful for running totals.
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