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2週ごとの住宅ローン計算機

2週ごとの支払いに切り替えると返済期間がどれだけ短縮され、利息を節約できるかを確認します。

はじめに

Biweekly Mortgage Calculator — See how switching to biweekly mortgage payments shortens your payoff time and saves interest. Enter Loan amount, Annual rate (%), Term (years) to get an instant, accurate result.

計算式

Biweekly payment = standard monthly payment / 2, paid every two weeks (26 payments/year), which is equivalent to 13 full monthly payments/year instead of 12. This calculator models that extra payment as one additional lump-sum principal payment applied once per year, then re-simulates the amortization month by month to find the actual payoff time and total interest — rather than applying a fixed percentage shortcut.

ステップごとの説明

  1. Enter the Loan amount.
  2. Enter the Annual rate (%).
  3. Enter the Term (years).
  4. Click Calculate to see your result instantly.

実例

Example: With Loan amount = 300000, Annual rate (%) = 6.5, Term (years) = 30, the Biweekly Mortgage Calculator gives Monthly Payment: 1896.2041, Biweekly Payment: 948.102, Standard Payoff Months: 360.

よくある質問

How does paying biweekly save money?
Because 26 half-payments a year equal 13 full monthly payments instead of 12, you effectively make one extra monthly payment annually, which goes entirely toward principal and shortens the loan.
Do I need my lender's permission to pay biweekly?
Check with your servicer first — some apply extra funds to principal immediately, while others hold partial payments until a full payment accumulates, which can blunt the benefit.
What inputs does the Biweekly Mortgage Calculator need?
You'll need to provide: Loan amount, Annual rate (%), Term (years). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Biweekly Mortgage Calculator?
The Biweekly Mortgage Calculator applies the formula exactly as calculated — Biweekly payment = standard monthly payment / 2, paid every two weeks (26 payments/year), which is equivalent to 13 full monthly payments/year instead of 12. This calculator models that extra payment as one additional lump-sum principal payment applied once per year, then re-simulates the amortization month by month to find the actual payoff time and total interest — rather than applying a fixed percentage shortcut. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Biweekly Mortgage Calculator free to use?
Yes, the Biweekly Mortgage Calculator is completely free, requires no signup, and runs instantly in your browser.

2週ごとの住宅ローン計算機について

The Biweekly Mortgage Calculator uses a real, verifiable formula — Biweekly payment = standard monthly payment / 2, paid every two weeks (26 payments/year), which is equivalent to 13 full monthly payments/year instead of 12. This calculator models that extra payment as one additional lump-sum principal payment applied once per year, then re-simulates the amortization month by month to find the actual payoff time and total interest — rather than applying a fixed percentage shortcut. — so results are accurate every time, not an approximation.