Basic Calculator
This works just like a pocket calculator.
How the basic calculator works
It takes two numbers and instantly shows their sum, difference, product, quotient and the first as a percentage of the second, with your selected operation featured as the headline result.
Worked example: with first number of 100 and second number of 25, the basic calculator shows a + b of 125.
- Sum (A + B)
- 125
- Difference (A − B)
- 75
- Product (A × B)
- 2,500
- Quotient (A ÷ B)
- 4.0000
The formula
Add: A + B · Subtract: A − B · Multiply: A × B · Divide: A ÷ B · Percentage: A ÷ B × 100.
Results are estimates for educational purposes and are not financial advice. Confirm exact figures with your lender, plan administrator or advisor.
Questions about the basic calculator
What can the basic calculator do?
Quick everyday arithmetic on two numbers — addition, subtraction, multiplication, division and percentage — all shown at once for convenience.
When should I use a dedicated financial calculator instead?
For anything involving interest, loans, savings or investments. Those tools apply the correct financial formula and show the full breakdown a plain calculator cannot.
How is the percentage figure calculated?
It expresses the first number as a percentage of the second — A divided by B, times 100 — useful for quick ratios and comparisons.
Is the Basic Calculator free to use?
Yes. Every calculator on FinCalculators is completely free, with no sign-up, login or paywall. You can run as many scenarios as you like.