What is the Annual Interest Rate?

The Annual Interest Rate (AIR) is an interest rate calculated on an annual basis, which represents the return/cost of a deposit or loan as a percentage of the principal amount for a year. It is one of the core measures of the time value of money in the financial sector and has a direct impact on the calculation of the amount of interest.

Common types of interest rates

Annual interest rate： Expressed as a percentage of the principal (e.g. 5%), often used for long-term savings or loans. Monthly interest rate： Annual interest rate ÷ 12, expressed as a percentage (e.g. 0.42%, which corresponds to an annual interest rate of 5%). Daily interest rate： Annual interest rate ÷ 365, expressed as a percentage of ten thousand (e.g. 0.014%, which corresponds to an annual interest rate of 5%).

Functional description of the calculator

The tool supports: - calculating the interest rate based on Principal, APR, Term (days/months/years) automatic calculation of total interest and principal and interest. - Annualised Yield Conversion for easy comparison of investment returns for different maturities. - Suitable for time deposits, financial products, credit loans and other scenarios.

Example

If you deposit 10,000 RMB with an annual interest rate of 3.5% and a term of 180 days: Interest = Principal × Annualised Percentage Rate × (Days ÷ 365) = 10,000 × 3.5% × $172.6(180÷365) ≈ 172.6 yuan

Note: The calculation results are theoretical values, the actual returns may be affected by taxes, compounding rules and other factors.