Type or tap
Press the keys or type on your keyboard: digits, + − * /, Enter for =, Backspace to delete a digit and Esc to clear.
Free Online Calculator
Add, subtract, multiply and divide with large keys or your keyboard, and keep every calculation on a tape you can copy. Percent works like a desk calculator, memory keys keep a running total, and full-screen mode turns your phone into a calculator.
Open Online Calculator →How to use the online calculator
Read the answer
The answer shows in large digits, and the line above it shows what you entered. Press = again to repeat the last step.
Keep your results
Every answer goes on the tape. Tap one to use it again, add it to memory with M+, or copy the whole tape.
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Online Calculator FAQ
Can I use my keyboard?
Yes. Type digits and + − * /, press Enter or = for the answer, Backspace to delete the last digit, Delete to clear the entry and Esc to clear everything. % is percent, N changes the sign, S is square root, Q squares and R takes the reciprocal. Ctrl+C copies the answer and Ctrl+V pastes a number.
How does the percent key work?
Like a desk calculator. 200 + 10% gives 220 and 80 − 25% gives 60, because the percent is a share of the number before it. 50 × 10% gives 5, and 50% on its own gives 0.5.
What is the tape?
A paper-style list of every calculation you finish with =. Tap a result to bring it back, copy the whole tape as text for a note or an email, or clear it. It stays in your browser for next time.
How do the memory keys work?
M+ adds the number on screen to memory and M− subtracts it. MR brings the memory back and MC clears it. The memory is kept in your browser, so a running total survives a page reload.
Does it follow the order of operations?
Yes. 2 + 3 × 4 gives 14, not 20, like phone calculators. For brackets, powers, trigonometry and logarithms, use the scientific calculator.
Can I use it full screen on my phone?
Yes. Tap the full-screen button above the display: the keypad fills the screen with large keys, like a calculator app. Tap it again or press Esc to go back.
Is it free?
Yes. Free, no sign-up, no limits, and it works offline once the page has loaded.
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