Basic Calculator
Last updated: November 5, 2026
Perform the four basic arithmetic operations and compare the results instantly.
Sum
—
- Difference: —
- Product: —
- Quotient: —
On this page
Quick summary: Perform the four basic arithmetic operations and compare the results instantly.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Perform the four basic arithmetic operations and compare the results instantly.
How to use it
Enter First number; Second number. Select Calculate to update the results.
How the calculation works
The calculator applies addition, subtraction, multiplication and division to the two entered numbers.
Worked example: starting scenario
| First number | 125 |
|---|---|
| Second number | 25 |
| Sum | 150 |
|---|---|
| Difference | 100 |
| Product | 3,125 |
| Quotient | 5 |
Important limitations
Division by zero is undefined. Displayed decimals may be rounded for readability.
Order matters for subtraction and division
For first number 8 and second number 2, the form reports sum 10, difference 6, product 16 and quotient 4. Swapping the inputs leaves the sum and product unchanged but changes the difference to −6 and quotient to 0.25. A zero second number makes division undefined; the other three operations can still be calculated.