Free online basic calculator for simple arithmetic. Add, subtract, multiply, and divide with our easy-to-use interactive calculator. Perfect for everyday math.
Using our basic online calculator is simple and intuitive. Follow these steps to perform any calculation:
To start a fresh calculation, press AC (All Clear). The ± button flips the sign of the current number, and % divides by 100.
Our basic calculator comes with everything you need for everyday arithmetic:
Addition, subtraction, multiplication, and division — all the essentials for everyday math.
Type numbers and operators directly on your keyboard. Use Enter for equals, Backspace to delete, and Escape to clear.
View your recent calculations below the calculator. Never lose track of what you've computed.
Negate numbers with ±, calculate percentages with %, and clear everything instantly with AC.
Works perfectly on desktop, tablet, and phone. Large buttons make tapping easy on touchscreens.
All calculations happen right in your browser. Nothing is sent to any server — your data stays private.
A basic calculator is useful in countless everyday situations:
Add up grocery totals, calculate discounts, split restaurant bills, and track daily spending.
Check arithmetic homework, practice math problems, and verify answers quickly.
Compute expenses, invoices, margins, and quick financial figures throughout the workday.
Measure areas, adjust recipe quantities, calculate material needs for projects around the house.
Track calorie totals, calculate sets and reps, and monitor fitness progress numbers.
Double-check mental calculations, add up tips, convert currencies, and handle any quick number task.
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