Equal Principal and Interest Payment Calculator
What Does This Tool Do? Calculate monthly payments, total interest, total repayment amount, and the repayment schedule for the first 12 months.
Equal Principal and Interest Payment Calculator User Guide
Compare loans with equal monthly principal-and-interest payments. Change the interest rate and repayment term to see how monthly payments and total interest change.
Sample Input and Results
Loan amount: 100,000,000 currency units · Annual interest rate: 4.5% · Term: 360 months → Monthly payment: approximately 506,685 currency units; total interest: approximately 82,406,712 currency units.
How Calculations & Processing Work
With monthly interest rate r = annual interest rate ÷ 100 ÷ 12 and repayment period n, the monthly payment is principal × r × (1+r)^n ÷ ((1+r)^n−1). If the interest rate is 0, calculate principal ÷ number of months.
When Using the Results
Assumes a fixed interest rate and monthly repayments. Early repayment fees, daily interest calculations, grace periods, interest rate changes, and bank-specific rounding to whole currency units are not included.
Calculator
Enter only the required numbers to update the results panel automatically.