APR calculator
Finance charge is total of payments minus amount financed. Flat-rate APR conversion, not the actuarial method.
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How is finance charge calculated? Total of payments minus amount financed.
How is the simple APR approximated? Finance charge I = total of payments − amount financed. Approximate APR = 2 × n × I / (P × (n+1)) as a percent (constant-ratio / flat-rate conversion). Example: $10,000 financed, 36 payments totaling $11,520 → I = $1,520, approx APR 29.58%.
Is this Reg Z APR? No. Official APR uses the actuarial method. This is a simple approximation. Not advice.