免费房贷计算器
使用免费房贷计算器，根据贷款金额、利率和期限快速计算每月还款额、总利息及还款计划。
每月还款额
$1,516.96
Monthly Payment vs Interest Rate
抵押贷款计算器帮助您根据贷款金额、利率和还款期限，估算每月需要偿还的月供金额。无论您是首次购房还是考虑再融资，了解月供构成对于做出明智的财务决策至关重要。
公式
每月还款额通过标准的等额本息还款公式计算：M = P × [r(1+r)^n] / [(1+r)^n − 1]。该公式将贷款总额在整个还款期内均匀分摊，每期还款中同时包含本金和利息。
- M = 每月还款额（月供）
- P = 贷款本金（借款总额）
- r = 月利率（年利率除以12）
- n = 总还款期数（贷款年限乘以12）
分步解答
- 01输入贷款总额（P），即您需要借款的金额。
- 02输入年利率，系统会自动将其转换为月利率（r = 年利率 / 12）。
- 03输入贷款期限（年），系统会计算总还款期数（n = 年数 × 12）。
- 04公式将这些数值代入，计算出固定的每月还款额（M）。
- 05您还可以查看还款计划表，了解每期还款中本金和利息的构成比例。
计算示例
假设您申请一笔30万元的住房贷款，年利率为6.5%，贷款期限为30年。
- 01贷款本金 P = 300,000 元
- 02月利率 r = 6.5% / 12 = 0.005417
- 03总还款期数 n = 30 × 12 = 360 期
- 04代入公式：M = 300,000 × [0.005417 × (1.005417)^360] / [(1.005417)^360 − 1]
- 05计算结果：每月还款额 M ≈ 1,896.20 元
请注意，实际月供可能还包括房产税、房屋保险和私人抵押贷款保险（PMI）等附加费用。建议您在制定购房预算时将这些额外支出一并考虑。
常见问题
How is a mortgage payment calculated?
A mortgage payment is calculated using the amortization formula: M = P * [r(1+r)^n] / [(1+r)^n - 1], where P is the loan principal, r is the monthly interest rate, and n is the total number of payments.
What is included in a mortgage payment?
A basic mortgage payment includes principal and interest (P&I). Your total housing payment may also include property taxes, homeowner's insurance, and PMI (private mortgage insurance) if your down payment is less than 20%.
How much should my down payment be?
A traditional down payment is 20% of the home price, which avoids PMI. However, many loan programs allow as little as 3-5% down. A larger down payment means lower monthly payments and less interest over the life of the loan.
What is the difference between a 15-year and 30-year mortgage?
A 15-year mortgage has higher monthly payments but you pay roughly half the total interest of a 30-year loan. A 30-year mortgage offers lower monthly payments and more cash flow flexibility, but you build equity slower and pay significantly more interest overall.
学习