MRR to ARR Calculator
Convert monthly recurring revenue into annual recurring revenue, with growth projection.
About this calculator
SaaS founders and investors typically talk in ARR, but internal reporting and billing systems usually track MRR, so converting between the two comes up constantly, and projecting where ARR will land a year from now compounds monthly growth in a way that isn't obvious from a quick mental multiplication. This calculator takes your current MRR and multiplies by 12 for a simple current ARR figure, then separately takes your expected monthly growth rate, compounds it over 12 months using MRR × (1 + growth)^12, and multiplies that projected MRR by 12 to show where ARR would land a year out if growth holds steady. It's useful for pitch decks, board updates, or just sanity-checking a growth target against where it would actually put the business. The compounding projection in particular is easy to get wrong by hand, since a small monthly growth rate compounds to a much larger annual effect than simply multiplying by 12 suggests.
Worked example
$20,000 MRR, 5% monthly growth
Result: $240,000 ARR
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