SaaS calculators,
on the house.
Quick calculators for the SaaS metrics your board asks about. When you want these tracked automatically on your real data, try atSpark.
MRR calculator
Calculate Monthly Recurring Revenue from your subscription mix. Handles monthly + annual plans, discounts, and seat counts.
Open calculator → RetentionChurn rate calculator
Customer churn and revenue churn for any time period. Compare gross vs net churn and see what a 1pt improvement is worth.
Open calculator → Unit economicsLTV calculator
Customer lifetime value from ARPU, gross margin, and churn. The single most predictive number for any subscription business.
Open calculator →Free SaaS calculators for the metrics that matter
Each calculator answers one question your board, investors, or finance team will ask. Enter a few numbers and get the result instantly. No signup and no spreadsheet formulas.
MRR calculator
Work out monthly recurring revenue from your monthly and annual plans.
Churn rate calculator
Get customer churn, gross revenue churn, and net revenue churn for any month, quarter, or year.
LTV calculator
Estimate customer lifetime value from ARPU, gross margin, and churn.
CAC calculator
Find your customer acquisition cost and see how it compares with LTV.
NRR calculator
Measure net revenue retention from starting MRR, expansion, contraction, and churn.
Quick Ratio calculator
Compare MRR added from new and expansion revenue with MRR lost to churn and contraction.
Want the formulas and benchmarks behind each number? Every metric is explained in the SaaS metrics glossary. When you want these tracked automatically on your real billing and CRM data, atSpark calculates them continuously.
FAQ
Questions about the calculators
How the free tools work and when to use atSpark instead.
Are the calculators free?
Yes. Every calculator is free to use and does not require a signup.
How accurate are the results?
The calculators use standard SaaS formulas, so results are only as accurate as the numbers you enter. For exact figures, atSpark calculates each metric directly from your billing and CRM data.
Which calculator should I start with?
Start with MRR and churn. Together they show how fast you grow and how much revenue you keep. Then add NRR, LTV, and CAC as you plan spend and fundraising.
Can atSpark track these metrics automatically?
Yes. atSpark connects to billing, CRM, and accounting tools and keeps 150+ reports up to date, including every metric on this page. Request a demo to see it on your data.