Finance calculator
MRR & ARR Calculator
This calculator turns your customer count and average revenue per account (ARPA) into monthly recurring revenue (MRR) and annual recurring revenue (ARR) — the two headline numbers for any subscription business. It models steady recurring revenue and excludes one-time fees and usage spikes.
How to use this calculator
- Enter your number of paying customers (or active subscriptions).
- Add your average revenue per account per month (ARPA).
- Read your MRR and ARR — the standard way SaaS revenue is reported.
Formula
- MRR = customers x average revenue per account (per month)
- ARR = MRR x 12
Example calculation
200 customers paying $100 a month gives $20,000 MRR and $240,000 ARR.
How to interpret the results
- MRR is the clearest pulse of a subscription business — track its month-over-month growth.
- ARR is simply MRR x 12; it's most meaningful when revenue is genuinely recurring (annual or monthly plans).
- Exclude one-time setup fees and usage overages from ARPA for a clean recurring figure.
Frequently asked questions
What is the difference between MRR and ARR?
MRR is monthly recurring revenue; ARR is annual recurring revenue, equal to MRR x 12. MRR is used for month-to-month tracking, ARR for annual targets and valuations.
What is ARPA?
ARPA is average revenue per account — your total recurring revenue divided by the number of accounts. Multiplying ARPA by your customer count gives MRR.
Should I include annual plans in MRR?
Yes — normalize annual contracts to a monthly figure (annual price ÷ 12) so they're reflected in MRR consistently with monthly plans.
Planning disclaimer
MoneyHackWise calculators are for general informational and planning purposes only and do not provide financial, investment, tax, legal, accounting, lending, or business advice. Results are estimates based on the inputs and assumptions shown.