ローン計算ツール
ローン金額、金利、期間を入力すると、月々の返済額、総利息、完全な返済スケジュールが表示されます。
Monthly payment (first)—
Total payment—
Total interest—
Number of payments—
Principal vs interest split
Principal 50%
Interest 50%
機能
Monthly payment calculation
Total interest and total cost
Equal monthly payment (annuity)
Equal principal repayment
Full amortization schedule
Interactive payment chart
使い方
1. ローン金額、年利率、ローン期間（年または月）を入力します。
2. 返済方式を選択します：元利均等（アニュイティ）または元金均等。
3. 右側にサマリーがリアルタイムで更新されます。
4. 「スケジュールを表示」をクリックして各回の元金、利息、残高を確認します。
よくある質問
What is the difference between equal monthly payment and equal principal?
Equal monthly payment (annuity) means the same total payment every month — early payments are mostly interest, later ones mostly principal. Equal principal means you pay the same principal every month, so total payments start high and decrease.
Does this account for taxes or insurance?
No. This calculator focuses on principal and interest only. For full mortgage costs, add property tax, insurance, and HOA fees separately.