Calculate interest revenue, principal amount, or annual interest rate by entering any two values to solve the missing value in a simple interest formula.
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Interest Revenue Formula
The interest revenue calculator uses the simple annual interest formula. Enter any two values and leave the third blank to calculate the missing amount.
To solve for principal amount:
To solve for interest rate:
- IR = interest revenue per year, in dollars
- P = principal amount, in dollars
- r = annual interest rate, as a percent
If you enter principal and interest rate, the calculator finds annual interest revenue. If you enter interest revenue and interest rate, it finds the principal amount required. If you enter interest revenue and principal, it finds the annual interest rate.
Common Annual Interest Revenue Amounts
The table below shows annual interest revenue for several principal amounts and interest rates using simple interest.
| Principal | 2% Rate | 4% Rate | 6% Rate | 8% Rate |
|---|---|---|---|---|
| $1,000 | $20 | $40 | $60 | $80 |
| $5,000 | $100 | $200 | $300 | $400 |
| $10,000 | $200 | $400 | $600 | $800 |
| $25,000 | $500 | $1,000 | $1,500 | $2,000 |
Example Calculations
Example 1: Calculate interest revenue
You have a principal amount of $12,000 and an annual interest rate of 5%.
The annual interest revenue is $600.
Example 2: Calculate the interest rate
You earned $450 in interest revenue from a $15,000 principal amount.
The annual interest rate is 3%.
FAQ
What is interest revenue?
Interest revenue is the money earned from lending or investing a principal amount. For this calculator, interest revenue is shown as a yearly dollar amount.
Does this calculator include compound interest?
No. This calculator uses simple annual interest only. It does not account for compounding, reinvested interest, changing rates, fees, or taxes.
Why do I need to leave one field blank?
The calculator is designed to solve for one missing value at a time. Enter exactly two known values, then leave the value you want to find blank.
