# ARPA

> ARPA is a unit-economics metric, calculated as MRR ÷ Active customers, per month. Per account, not per user (ARPU) — say which; mean, not median.

Source: https://lopifi.com/glossary/arpa
Part of: Lopifi — US GAAP books on autopilot, reviewed by a CPA (https://lopifi.com)

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**What is arpa?** ARPA is a unit-economics metric, calculated as MRR ÷ Active customers, per month.

## Formula

`MRR ÷ Active customers, per month`

## Also known as

- Average revenue per account

## Note

Per account, not per user (ARPU) — say which; mean, not median

- **Category:** Unit economics
- **Specified in:** [Metric definitions](https://lopifi.com/md/docs/domain/10-metrics)
- **Related:** account