Online Calculator
A simple, fast calculator for everyday sums with keyboard support. Free, fast and easy to use.
How it works
A clean online calculator for addition, subtraction, multiplication, division and percentages. It respects the order of operations, supports brackets and works with your keyboard: type digits and operators, press Enter for the result, Backspace to delete and Esc to clear. Recent calculations are kept in the history below the display.
Calculations run locally in your browser. Results are for information only — for engineering, electrical or financial decisions, verify the assumptions and applicable standards.
Frequently asked questions
Does the calculator follow the order of operations?
Yes. Brackets come first, then multiplication and division, then addition and subtraction: 2 + 3 × 4 = 14.
How does the % key work?
On its own it divides by 100 (50 % = 0.5). After plus or minus it adds or subtracts a percentage: 200 + 10 % = 220.