Generate a loan amortization preview with monthly payment, principal split, total interest, and payoff schedule. Client-side and private.
Added May 4, 2026
Input
Result
Enter a value for loan amount to see your result.
Builds a fixed-rate loan amortization preview showing the monthly payment, total interest, and how early payments split between principal and interest.
Payment = P x r / (1 - (1 + r)^(-n))
A 30-year loan starts interest-heavy; month 1 includes about $1,354 in interest and $226 in principal.
Inputs
Result
Interest is charged on the remaining balance, so the first payments have the largest interest portion.
No. It models standard monthly amortization before fees, escrow, rounding rules, and partial first periods.