ARR Calculator

Guide

This page is a calculator first, but it's also a quick reference you can share internally. Start with the presets, then adjust inputs and copy the share link. Example defaults for this tool are shown below.

Example (defaults)

Example inputs: MRR = 50000

Inputs explained

Outputs explained

How it works

• ARR is the annualized run rate: ARR = MRR x 12.
• If you start from annual contract value, convert to MRR first (ACV / 12), then multiply by 12.
• Use ARR for run-rate comparisons, not accounting statements.

Modeling tips

• Use normalized MRR (annual contracts divided by 12).
• Exclude one-time fees and non-recurring services.
• Use a recent stable month for run-rate reporting.
• Keep ARR in the same currency and definitions across time.
• If you have large seasonal swings, average across multiple months.
• If usage revenue is volatile, use a trailing 3-month MRR average.

Validation checks

• ARR should equal MRR x 12.
• If MRR is 0, ARR should be 0.
• If ARR differs from booked revenue, confirm you are using run-rate.
• ARR should move in the same direction as normalized MRR.

Common mistakes

• Including one-time services or setup fees in MRR before annualizing.
• Annualizing a peak month instead of a representative month.
• Mixing booked revenue with run-rate ARR in the same report.
• Ignoring currency normalization when comparing ARR over time.

Interpretation

• Use ARR for consistent run-rate reporting, not cash planning.
• If ARR jumps unexpectedly, validate the underlying MRR inputs.
• Average multiple months when seasonality or usage spikes are common.
• Pair ARR with bookings to see pipeline vs run-rate.

Use cases

Mini walkthroughs

Scenarios

Edge cases

• If MRR includes one-time fees, ARR will be overstated.
• If MRR is volatile, a single month can mislead; average multiple months.
• If currency changes, normalize before comparing ARR across periods.
• If billing cadence changes mid-period, recompute normalized MRR before annualizing.

FAQ