Basic Online Calculator
A simple calculator for the basic operations: addition, subtraction, multiplication, division.
Tip: Use your computer keyboard for faster input — numbers, +, -, *, /, Enter for the result, Esc to clear.
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About this digital tool
The basic online calculator performs the four fundamental operations: addition, subtraction, multiplication and division, as well as percentage, sign change (±) and deleting the last digit. Press the buttons on screen or use the keyboard; the result appears instantly and recent calculations are saved in a history.
The calculator respects the order of operations: multiplication and division are done before addition and subtraction, so 2 + 3 × 4 gives 14. The result is rounded to 10 decimal places, so calculations such as 0.1 + 0.2 show as 0.3. It works on phone and computer, with no installation. It suits everyday calculations, shopping, the household budget and simple homework.
How to use
- Enter the first number
- Choose the operation (+, -, ×, ÷)
- Enter the second number
- Press = or Enter
- See the result
Frequently asked questions
Does it have scientific functions?
The basic version has: +, -, ×, ÷, %, √, ±, and memory (M+, M-, MR, MC). For scientific functions (sin, cos, log, etc.) see the scientific calculator.
Does it keep a history of calculations?
Yes, it shows the list of recent calculations during the session. You can reuse previous results by clicking them.
Does it work with the keyboard?
Yes, fully. Numbers 0–9, operators (+, -, *, /), decimal point (.), Enter = result, Backspace = delete, Escape = clear.
Does the calculator respect the order of operations?
Yes. Multiplication and division take priority over addition and subtraction. So 2 + 3 × 4 = 14, not 20.