Calculate interest and final balance without compounding.
Start with the broad calculator that matches the decision, then move to a specialist only when the loan structure, cash flow, tax treatment, debt strategy or savings goal genuinely changes.
Keep the simple-interest contract explicit: interest is P×r×t with no interest-on-interest. Convert months or days to a year fraction using a selected day-count basis, then reverse-solve the time needed to reach a target final amount.
| Evidence | Value | Formula role | Boundary check |
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The reverse solve assumes the same principal and annual simple rate. It does not add compounding, fees or recurring deposits.
connects debt payoff, credit-card cost, loan comparison, APR/APY, effective-rate, weighted-rate, and hypothetical consolidation calculations.
Results are deterministic browser-local math from the values you enter. They are useful for scenario comparison, but they are not a lender quote, approval decision, investment forecast, credit recommendation, or substitute for an account agreement.
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