# Churn from errors estimator

Estimate how many customers you lose to errors they hit, and what that’s worth over a year.

## How it works

Customers who hit errors leave a bit more often than others. That extra churn, times the customers affected and their value, is what errors cost.

```
lost = customers × share hit × extra churn
```

## Questions

### How do I know who hit errors?

Join failed requests to user or session IDs. PowerTraces does this per customer.

### Are all errors equal?

No. A failed payment matters far more than a slow image.

## Related tools

- [Speed vs revenue calculator](https://powertraces.com/tools/speed-vs-revenue)
- [Observability ROI calculator](https://powertraces.com/tools/observability-roi)
- [SLA credit calculator](https://powertraces.com/tools/sla-credits)
- [Funnel drop-off calculator](https://powertraces.com/tools/funnel-drop-off)

[All tools](https://powertraces.com/tools)