- Enter the loan amount in yuan, the annual interest rate in percent, and the loan term in years.
- Choose the repayment method: equal-payment or equal-principal.
- Read your monthly payment, total interest and total payment instantly.
Everything is calculated locally in your browser. No data is uploaded, so you can explore different scenarios freely.
A mortgage is the largest financial commitment most people ever make. Knowing the monthly payment before signing lets you compare loan offers, check affordability against your income, and decide between repayment methods. The difference between equal-payment and equal-principal can amount to tens of thousands of yuan in interest over 30 years.
Tips
Try adjusting the loan term — shortening it by even 5 years often cuts total interest dramatically. Use equal-principal if you want to minimize total interest and can handle higher early payments; use equal-payment for predictable monthly expenses.
Why use it
Mental amortization math is impractical, and bank calculators often require personal details or show only one repayment method. This tool gives you both methods side by side, updates live as you type, and keeps your figures private in the browser.
Real-world use cases
- Home buying: Estimate monthly payment and total interest before talking to a bank. Adjust years vs. rate to see the trade-off.
- Budgeting: Use percentage and discount calculators to quickly check sale prices while shopping.
- Planning: Workday and unit converters save time when coordinating across teams and regions.
How accurate is it?
Results use standard formulas with double-precision floats, matching Excel and banking calculators to within cents. Assumptions are shown in the note (e.g., monthly compounding). For legally binding totals, confirm with the provider because fees, insurance and rounding rules differ.
Pro tips
- For loans, compare equal-payment vs equal-principal: the latter starts higher but pays less interest overall.
- For fuel and discount math, keep one decimal extra while comparing options, then round for display.
- Save results with a screenshot or copy; everything is local so refreshing clears the form.