Simple Interest Calculator (2026)

Calculate simple interest on loans, investments or savings in AUD. Enter principal, rate and time to see results instantly.

FormulaI = P × r × t
Step 1

Input Values

The initial amount of money invested or borrowed

Annual interest rate as a percentage

Time period in years

Step 2

Results

Interest Earned

$1,000.00

Total Amount

$11,000.00

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Visualisation

Growth Over Time

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Frequently Asked Questions