॥ श्री गणेशाय नमः ॥॥ ॐ श्रीं महालक्ष्म्यै नमः ॥

STRAIGHT-LINE INTEREST

Simple Interest Calculator

Calculate interest only on the original principal for the selected rate period.

Formula: I = P × R × T ÷ 100

%

The result will appear here

Enter the amount, rate, and duration to calculate.

How to use this calculator

Use this free calculator to estimate interest on an original principal amount. Select yearly, monthly or daily rates, then enter the duration to see the interest and total payable amount.

Is this simple interest calculator free?

Yes. You can use the calculator online without creating an account, logging in or taking a subscription.

What is the simple interest formula?

Simple interest is calculated as principal multiplied by rate multiplied by time, divided by 100. Confirm the rate period and duration use the same unit.

Can I calculate monthly or daily interest?

Yes. Choose the relevant rate period, enter the duration in the same unit and calculate the result instantly.