Calculate the percentage of existing customers retained over time.
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Primary Result—
Secondary Result—
Total / Final Value—
Growth / Percentage—
| Step | Label | Value |
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What this result means
This result shows total interest and final amount with simple interest.
When to use this calculator
Use it for basic lending, borrowing, and fixed-return comparisons.
Why it is useful
It helps estimate straightforward interest costs.
About this calculator
This result shows how well your business keeps existing customers.
When to use it
Use it alongside churn and CLV analysis.
Why it matters
It helps show customer loyalty and product-market fit.