How to use the Simple Interest Calculator
Fill in the fields on the left. Results, charts and the breakdown update instantly as you type or move a slider. Pick your country at the top of the page to switch currency.
Formula
Simple interest = P × R × T ÷ 100
Total = P + interest
Frequently asked questions
Simple vs compound interest?
Simple interest is only on the principal. Compound interest is also charged on past interest, so it grows faster over time.
Results are estimates for information only and are not financial, tax or legal advice. Tax rules, interest rates and fees change, so confirm important numbers with your bank, employer or a qualified adviser. Read our disclaimer.