Interest Rate Converter
Convert between annual, monthly, weekly, and daily rates
金利を入力
複利: 利息が再投資される | 単利: 利息が一定
変換結果
About Interest Rate Converter
The Interest Rate Converter accurately converts between annual, monthly, weekly, and daily interest rates using both compound and simple interest mathematics. Rather than simply dividing by 12 (annual to monthly), the compound mode uses the formula: monthly = (1 + annual)^(1/12) - 1. For example, a 12% annual rate converts to approximately 0.949% monthly, not 1%. This matches actual financial products.
Compound interest calculations are used by banks, investment firms, and credit card companies, while simple interest serves educational purposes and quick comparisons. Use it to compare loan rates across different periods, verify investment returns on a monthly, weekly, or daily basis, or understand effective rates on credit cards and cash advances.
Results can be copied with one click. Toggle between compound and simple modes to see how the same rate appears under different calculation methods. Supports short-term investment rates (weekly bonds, money market accounts) and promotional rate comparisons.
How to use Interest Rate Converter
- Enter the interest rate as a percentage for the period you already know.
- Select whether the entered rate is annual, monthly, weekly, or daily.
- Choose compound or simple calculation mode to match the comparison you need.
- Review annual, monthly, weekly, and daily converted rates in real time.
- Use the Copy button when you want to transfer the result to a comparison sheet or memo.
Benefits of Interest Rate Converter
- Both compound and simple interest modes are available, so you can match the calculation to your use case.
- Annual, monthly, weekly, and daily rates appear together for easier period-based comparison.
- The converted rates help compare loans, investments, credit cards, and other financial products on one basis.
- The copy feature lets you move conversion results into a comparison table or notes quickly.
- Browser-only processing keeps your rate assumptions on your device.
- Short-, medium-, and long-term rate comparisons can be checked without financial formulas.
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