All calculators
16 free calculators, all running entirely in your browser. Pick a category or jump straight in.
MRR & ARR Calculator
Turn plans, seats and billing terms into clean MRR and ARR — including net-new MRR after churn.
Net Revenue Retention (NRR) Calculator
Calculate NRR from expansion, contraction and churn — and see how it compares to SaaS benchmarks.
Gross Revenue Retention (GRR) Calculator
Measure the revenue you keep before expansion — your retention floor — against benchmarks.
Churn Rate Calculator
Calculate customer and revenue churn, and convert between monthly and annual churn correctly.
ARPU & ARPA Calculator
Average revenue per user/account from MRR and active accounts — monthly and annual.
CAC Calculator
Customer acquisition cost from sales & marketing spend and new customers won.
LTV Calculator
Customer lifetime value from ARPA, gross margin and churn — the right way, margin-adjusted.
LTV:CAC Ratio Calculator
The LTV:CAC ratio with payback period — is your acquisition efficient enough to scale?
CAC Payback Period Calculator
How many months to recover CAC from gross-margin-adjusted new MRR.
SaaS Magic Number Calculator
Sales efficiency: new ARR generated per dollar of prior-quarter sales & marketing spend.
SaaS Quick Ratio Calculator
Growth efficiency: new + expansion MRR divided by churned + contraction MRR.
Rule of 40 Calculator
Growth rate + profit margin, including the weighted variant — do you clear 40%?
Burn Rate & Runway Calculator
Net burn and months of runway, with a hiring-plan scenario to stress-test your cash.