How to calculate interest and principal parts of loan installment payment?
Try changing the values in the input fields below to see how the calculation results update in real time!
My monthly payment is % interest. If the total payment is $ ...
How much goes to interest vs. principal?
Type of calculation: Calculating a percentage of a number
(interest part), then subtracting (principal part).
How to use the calculator:
Step 1 (Interest part): Use the Basic Percentage CALCULATOR ("What is X% of Y?"). Enter 70 [X] and $1500 [Y]. It will calculate 70% of $1500.
Step 2 (Principal part): Subtract the interest part (Step 1) from the total payment amount.
The formula:
We want to split the payment into interest (70% of $1500) and principal.
Interest part = (70 / 100) × $1500 = 0.7 × $1500 = $1050
Principal part = $1500 - $1050 = $450
How to use the calculator:
Step 1 (Interest part): Use the Basic Percentage CALCULATOR ("What is X% of Y?"). Enter 70 [X] and $1500 [Y]. It will calculate 70% of $1500.
Step 2 (Principal part): Subtract the interest part (Step 1) from the total payment amount.
The formula:
We want to split the payment into interest (70% of $1500) and principal.
Interest part = (70 / 100) × $1500 = 0.7 × $1500 = $1050
Principal part = $1500 - $1050 = $450
Answer: The interest is $ and the principal is $ .