Estimate student loan monthly payments, grace-period interest, repayment balance, total interest, and total paid. Private client-side tool.
Added May 4, 2026
Input
Result
Enter a value for loan balance to see your result.
Estimates student loan repayment by accounting for interest that accrues during a grace period and the fixed monthly payment after repayment starts.
Grace Interest = P × (r / 12) × grace months Repayment Balance = P + Grace Interest (if capitalized) Monthly Payment = P_adj × r / (1 − (1 + r)^(−n))
Six months of interest adds about $1,100 before repayment if it capitalizes.
Inputs
Result
Capitalization adds unpaid interest to principal, so future interest is charged on a larger balance.
No. It models fixed amortized repayment, not income-driven plans, subsidies, or forgiveness.