Calculate simple interest — solve for Interest, Principal, Rate, or Time.
| Principal | — |
| Rate | — |
| Time | — |
| Simple Interest | — |
| Total Amount | — |
I = P × R × T / 100 | where I = Interest, P = Principal, R = Rate (%), T = Time (years).
Simple interest is calculated only on the principal. Compound interest is calculated on principal + accumulated interest. For long-term loans/investments, compound interest makes a significant difference.
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