SaaS & Subscription Calculators
Run the unit economics, growth, and retention metrics every subscription business reports.
33 free calculators in this category
Annual Recurring Revenue Growth Calculator
Calculate your annual recurring revenue growth rate year-over-year and track absolute ARR added — the core SaaS metric investors review first.
ARPU Calculator
Calculate ARPU by entering total revenue and active user count to see average revenue per user monthly and annualised instantly.
ARR Calculator
Calculate current ARR and forecast future ARR using your MRR and monthly growth rate over a 12 to 24 month projection horizon.
ARR Payback Period Calculator
Calculate ARR payback period using total CAC spend, new ARR added, and gross margin to estimate months until acquisition costs are recovered.
CAC Payback Period Calculator
Calculate CAC payback period in months from customer acquisition cost, MRR per customer, and gross margin on the contract.
Churn Rate Calculator
Calculate churn rate and net growth rate from starting customers, customers churned, and customers gained during the period.
Churn Revenue Impact Calculator
Calculate annual revenue lost to customer churn and the equivalent count of new customers needed to replace it on the books.
Churn vs Revenue Churn Calculator
Compare customer churn against revenue churn to reveal customer-mix quality and the retention curve hidden inside the headline number.
Customer Acquisition Cost Calculator
Calculate customer acquisition cost from total marketing spend, sales spend, and the count of new customers gained in the period.
Customer Churn Cost Calculator
Calculate annual revenue lost to customer churn using your customer count, monthly churn rate, and average revenue per user (ARPU).
Customer Cohort Analysis Calculator
Calculate cohort retention metrics and 12-month cohort revenue from monthly retention rates and the cohort's starting MRR.
Customer Lifetime Value Calculator
Calculate customer lifetime value using purchase value, frequency, lifespan, and gross margin to estimate total profit per customer over time.
Freemium Conversion Calculator
Calculate freemium model annual net value from free users, conversion rate, paid price, and cost to serve. Free educational tool.
Freemium Revenue Model Calculator
Calculate freemium model MRR across free, basic, pro, and enterprise tiers. Enter signups to see monthly and annual revenue from freemium tier distribution.
Freemium to Paid Conversion Calculator
Calculate freemium-to-paid conversion rate and resulting revenue from trial-start rate and trial-to-paid conversion at your current funnel.
Gross Revenue Retention Calculator
Calculate gross revenue retention from starting MRR, churned MRR, and contraction MRR — the SaaS health number that excludes upsells.
LTV:CAC Ratio Calculator
Calculate LTV-to-CAC ratio from customer lifetime value and customer acquisition cost — the standard SaaS unit-economics health check.
SaaS Magic Number Calculator
Calculate the SaaS magic number from quarterly MRR growth and combined sales-and-marketing spend, given current and prior quarter MRR.
MRR Calculator
Calculate Monthly Recurring Revenue growth, churn, and ARR for SaaS businesses. Enter previous period mrr to see mrr growth rate and current mrr.
MRR Growth Calculator
Project monthly recurring revenue growth over months with churn. Enter mrr to see mrr growth over months including monthly growth rate and churn.
Net Revenue Retention Calculator
Calculate net revenue retention from starting MRR, churn, contraction, and expansion. Enter churned mrr to see nrr from starting mrr and churned mrr.
NPS Calculator (Net Promoter Score)
Calculate Net Promoter Score (NPS) from promoter, passive, and detractor counts. See your NPS score and how it benchmarks against your industry.
Payback Period Calculator
Calculate payback period in years and months by dividing your initial investment cost by steady annual cash inflows. No time value of money.
Rule of 40 Calculator
Calculate the SaaS Rule of 40 score by summing revenue growth rate and profit margin — the threshold investors use for healthy SaaS.
SaaS Churn Rate Calculator
Calculate SaaS monthly and annualised churn rate, lost MRR, and average customer lifetime from start-of-period and end-of-period customer counts.
SaaS LTV:CAC Ratio Calculator
Calculate SaaS LTV-to-CAC ratio from MRR, gross margin, monthly churn, and customer acquisition cost, plus the implied payback months.
SaaS MRR Calculator
Calculate SaaS MRR, ARR, and Net New MRR from customers, average MRR, new/churned customers, and expansion. Enter mrr per customer to see mrr and arr.
SaaS Payback Period Calculator
Calculate months needed to recover CAC from gross margin on ARPU. Enter customer acquisition cost and arpu monthly to see payback months.
SaaS Pricing Calculator
Calculate the SaaS price needed to hit your LTV:CAC target from acquisition cost, gross margin, and contract length. Free — no signup.
SaaS Revenue Calculator
Project SaaS revenue with this SaaS revenue calculator. Forecast cumulative revenue, ending MRR, and annualized run rate over any growth period.
SaaS Rule of 40 Calculator
Calculate the SaaS Rule of 40 — revenue growth rate plus profit margin should sum to at least 40 to qualify as a healthy SaaS business.
Subscription Revenue Forecast Calculator
Forecast subscription MRR over time using monthly growth rate, churn rate, and the current subscriber count as starting point.
Viral Coefficient Calculator
Calculate the viral coefficient (k) from invites sent per user, conversion rate of those invites, and cycle time between cohorts.
About SaaS & Subscription Calculators
Calculators for ARR, MRR, ARPU, CAC, LTV, NRR / GRR, churn rate, magic number, rule of 40, viral coefficient, freemium conversion, payback period, customer cohort analysis, customer lifetime value, expansion and retention metrics, subscription revenue forecasts. The vocabulary of board decks and investor updates — translated to the maths you need to compute the numbers from your own data.