SaaS Metrics Calculator
Calculate MRR, ARR, net revenue retention, quick ratio, and growth rate for SaaS businesses.
By Konstantin Iakovlev · Updated September 2026 · Source: SBA — Business Guide
MRR
$57.0K
ARR
$684.0K
Net Revenue Retention
98.0%
MRR Breakdown
| Starting MRR | $50,000.00 |
| + New MRR | $8,000.00 |
| + Expansion MRR | $2,000.00 |
| - Churned MRR | $3,000.00 |
| Net New MRR | $7,000.00 |
| End MRR | $57,000.00 |
Key Metrics
| ARR | $684,000.00 |
| Net Revenue Retention (NRR) | 98.0% |
| Quick Ratio | 3.33 |
| Monthly Growth Rate | 14.0% |
| ARPU | $285.00 |
| Months to $1M ARR | 3 |
Use the SaaS Metrics Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
How It Works
Founders and finance teams lean on a handful of numbers to gauge whether a subscription business is actually healthy: MRR, ARR, Net Revenue Retention, Quick Ratio, and Growth Rate. This tool computes all of them at once so you can size up performance and prepare for investor conversations.
Each metric follows the standard SaaS definition, applied to the period your inputs cover, normally one month. Ending MRR is starting MRR plus new and expansion MRR minus churned MRR, and ARR is ending MRR x 12. Net Revenue Retention is (starting MRR − churned MRR + expansion MRR) / starting MRR, so it shows how existing accounts trend without new sales. The SaaS Quick Ratio is (new + expansion MRR) / churned MRR, a measure of growth efficiency rather than liquidity, and Growth Rate is net new MRR as a share of starting MRR. There is no separate field for downgrades (contraction), so include them in churned MRR.
Consistency in your inputs matters more than almost anything else here, particularly when it comes to time periods. The most frequent error is folding one-time payments into recurring revenue, which inflates both MRR and ARR. Comparing figures pulled from different reporting windows without normalizing them first will distort the picture just as badly, so align your periods before reading too much into the results.
Example: One Month of SaaS Metrics
- 1 Input: starting MRR $50,000; during the month, new MRR $8,000, expansion MRR $2,000 and churned MRR $3,000 (downgrades included); 200 customers at month end.
- 2 MRR: $50,000 + $8,000 + $2,000 − $3,000 = $57,000 ending MRR, $7,000 of it net new. ARR: $57,000 × 12 = $684,000.
- 3 Net Revenue Retention: ($50,000 − $3,000 + $2,000) / $50,000 = 98%. Quick Ratio: ($8,000 + $2,000) / $3,000 = 3.33. Growth rate: $7,000 / $50,000 = 14% for the month. ARPU: $57,000 / 200 = $285.
- 4 Reading it: new sales are growing the business fast, but NRR under 100% means the existing base shrank. If 14% a month held, ARR would pass $1 million in about 3 months (ln(1,000,000 / 684,000) / ln(1.14) = 2.9).
Source: SBA — Business Guide · Last updated: September 2026
Frequently Asked Questions
What is a good net revenue retention rate for SaaS?
How do you calculate SaaS quick ratio?
What is the difference between MRR and ARR?
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