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Deposit interest calculator

Enter the deposit amount, annual interest rate and term in days. The calculator works out the interest income and the total amount at the end of the term — without compounding.

Result

Interest income

Amount at term end

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This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Interest = deposit amount × annual rate ÷ 100 × term in days ÷ 365. This is simple interest: it accrues only on the original deposit amount, not on interest already earned — there's no capitalization adding it back to the base for the next accrual.

This calculation fits deposits where interest is paid out at the end of the term or transferred to a separate account rather than folded into the deposit. If the deposit's terms capitalize interest (adding it to the balance so it also earns further interest), the income will be higher — compute that with the separate compound interest calculator.

The term is entered in days and divided by 365 — a common but not universal convention: some banks count a 360-day year. The final amount may differ slightly from the bank's own calculation depending on the exact accrual method in the contract.

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