Simple Interest Calculator

Simple Interest Calculator - calculate simple interest, total amount, interest per month instantly with formulas, worked steps and explanations.

Projections assume a constant rate of return. Actual market returns vary and past performance does not guarantee future results.

Simple Interest Calculator inputs
Simple Interest โ‚น40,000.00
Total Amount
โ‚น1,40,000.00
Interest per Month
โ‚น666.67

Principal / Interest

SI = (P ร— R ร— T) divided by (100)
P
Principal
R
Rate percent per year
T
Time in years

1,00,000 at 8% simple interest for 5 years earns 40,000.

How is Simple Interest calculated?

Simple Interest Calculator uses the formula SI = (P x R x T) / (100). Enter your own figures above and the result updates instantly in your browser.

What information do I need to use this calculator?

You need principal amount, annual interest rate and time period. Every field starts with a realistic default so you can see how the calculation behaves before entering your own numbers.

What do the results show?

The headline figure is simple interest. Alongside it you also get total amount, interest per month, so you can see the full picture rather than a single number.