Calculator
Enter simple interest details
Adjust principal, rate, and tenure to calculate simple interest instantly.
Rs.
Rs.1000Rs.10000000
%
0 %30 %
Years
1 Years30 Years
Loading Weburcode…
Calculate simple interest and total amount using principal, annual interest rate, and tenure.
Calculate simple interest and total amount using principal, annual interest rate, and tenure.
Enter principal, annual rate, and duration, then review the live result and growth table.
This calculator runs in your browser without accounts, backend storage, or database persistence.
Browse finance calculators ->Calculator
Adjust principal, rate, and tenure to calculate simple interest instantly.
Breakdown
Compare your original principal with the interest earned over time.
Principal
₹1,00,000
71%
Interest
₹40,000
29%
Year-wise view of linear interest accumulation.
| Period | Opening amount | Interest earned | Total interest | Closing amount |
|---|---|---|---|---|
| Year 1 | ₹1,00,000 | ₹8,000 | ₹8,000 | ₹1,08,000 |
| Year 2 | ₹1,08,000 | ₹8,000 | ₹16,000 | ₹1,16,000 |
| Year 3 | ₹1,16,000 | ₹8,000 | ₹24,000 | ₹1,24,000 |
| Year 4 | ₹1,24,000 | ₹8,000 | ₹32,000 | ₹1,32,000 |
| Year 5 | ₹1,32,000 | ₹8,000 | ₹40,000 | ₹1,40,000 |
Formula
Simple interest grows linearly because interest is calculated only on the original principal.
Simple interest formula
SI = P x R x T / 100
In this formula, P is principal, R is annual interest rate, and T is time in years.
Total amount is calculated by adding simple interest back to the principal. Unlike compound interest, earned interest is not reinvested into the principal.
FAQ
Clear answers for common simple interest calculation questions.
Related tools
Continue comparing simple interest with compound growth, deposits, and loan calculations.