SaaS Growth Calculators
Subscription businesses need a connected stack: acquisition cost, lifetime value, recurring revenue, retention, and efficiency. This hub groups the calculators SaaS founders and operators use most often.
Start with CAC and LTV to understand unit economics, then check LTV:CAC and payback for capital efficiency. Track MRR / ARR / NRR for revenue health, and use Magic Number, Burn Multiple, and Rule of 40 when you talk to investors about growth quality.
Prefer a connected view? Open the Growth Dashboard or read the SaaS unit economics guide.
CAC Calculator
Measure how much you spend to acquire each new customer by dividing total acquisition spend by new customers acquired.
CAC = Total Acquisition Spend ÷ New Customers Acquired
LTV Calculator
Estimate the total revenue a customer generates over their relationship with your business.
LTV = (ARPU × Gross Margin) ÷ Churn Rate
LTV:CAC Ratio
Compare customer lifetime value to acquisition cost to assess whether your growth is profitable and sustainable.
LTV:CAC Ratio = LTV ÷ CAC
CAC Payback Period
Find how many months it takes to recover the cost of acquiring a customer through their gross margin contribution.
Payback Period = CAC ÷ (ARPU × Gross Margin)
MRR Calculator
Calculate monthly recurring revenue (MRR) instantly: Active Customers × ARPU, with growth and churn context for SaaS.
MRR = Active Customers × ARPU
ARR Calculator
Calculate annual recurring revenue (ARR) instantly: MRR × 12, the investor-standard SaaS scale metric.
ARR = MRR × 12
NRR Calculator
Calculate NRR (Net Revenue Retention), also called NDR (Net Dollar Retention), including expansion, contraction, and churn.
NRR = (Starting MRR + Expansion − Contraction − Churn) ÷ Starting MRR × 100
Magic Number
Measure how efficiently your sales and marketing spend generates new annual recurring revenue.
Magic Number = New Bookings (ARR) ÷ Prior Quarter S&M Spend
Burn Multiple
Calculate your SaaS Burn Multiple with the standard formula (Net Burn ÷ Net New ARR) to measure capital efficiency.
Burn Multiple = Net Burn ÷ Net New ARR
Rule of 40
Combine revenue growth rate and EBITDA margin to measure overall SaaS business health.
Rule of 40 = Revenue Growth % + EBITDA Margin %
ASP Calculator
Find the average revenue per closed deal to benchmark pricing and sales performance.
ASP = Total Revenue ÷ Number of Deals
Churn Impact
Quantify how monthly churn affects revenue, LTV, and the value of retention improvements.
Revenue at Month N = Starting MRR × (1 − Churn)^N
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