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Loan Calculator
Estimate monthly payments and total interest for a loan. One-click presets for common amounts, rates and terms. Supports equal principal & interest, equal principal, and lump-sum at maturity, with an optional grace period, a repayment chart, prepayment-fee estimate, and saved calculations.
📥 Inputs
🔁 Repayment Method
Equal P&IFixed monthly
Equal PrincipalDecreasing
Lump-SumInterest-only
Loan Amount
KRW
Annual Rate
%
Loan Term
months
Grace Period
months
Interest-only months before principal repayment.
📊 Summary
Monthly Payment
—
Total Payment
—
Total Interest
—
Total Principal
—
Interest ÷ Principal
—
📈 Repayment Chart
Bars = principal (blue) + interest (orange) paid each month · Line = remaining balance.✂️ Prepayment Fee (optional)
▶🕘 Recent Calculations
📅 Repayment Schedule
| Month | Payment | Principal | Interest | Balance |
|---|
Methods
Equal P&I: fixed monthly M = P·i·(1+i)n / ((1+i)n−1), i = annual rate / 12.
Equal Principal: P/n each month + interest on remaining balance (payment decreases).
Lump-Sum: interest only each month, full principal at the end.
Equal P&I: fixed monthly M = P·i·(1+i)n / ((1+i)n−1), i = annual rate / 12.
Equal Principal: P/n each month + interest on remaining balance (payment decreases).
Lump-Sum: interest only each month, full principal at the end.