Simple Interest Calculator
Calculate simple interest instantly. Compare simple interest vs compound interest to see the difference.
💰Details
vs Compound Interest
CI Amount
₹46.9K
Total (CI)
₹1.47 L
CI earns ₹6.9K MORE than SI
Simple vs Compound Interest
Instant Calculation
Get simple interest amount and total instantly.
SI vs CI Comparison
See how much more compound interest earns over simple.
Multi-Currency
Works with any currency.
How to Use
Enter Principal
Set the initial amount.
Set Rate
Enter annual interest rate.
Choose Period
Select time in years.
View Results
See SI, total amount, and CI comparison.
The Formula
SI = (P × R × T) / 100Frequently Asked Questions
What is Simple Interest?
Simple Interest is calculated only on the original principal amount. Unlike compound interest, it doesn't earn interest on previously earned interest.
Simple Interest vs Compound Interest?
SI grows linearly, CI grows exponentially. Over long periods, CI significantly outperforms SI. For ₹1L at 10% for 20 years: SI = ₹3L, CI = ₹6.7L.
Where is Simple Interest used?
Short-term loans, car loans, some personal loans, and treasury bills use simple interest. Most investments and savings accounts use compound interest.
How to calculate monthly simple interest?
Monthly SI = (P × R) / (100 × 12). For ₹1,00,000 at 12%: Monthly interest = ₹1,000.