Free growth marketing calculators
Growth work is a loop of acquisition, activation, retention and revenue. These calculators check each part of the loop: whether unit economics allow scaling a channel, whether referrals compound, where conversion leaks and whether an experiment moved the metric.
Tools in this collection
- LTV and CAC calculator
Does a customer earn back what it cost to acquire them?
- CAC payback period calculator
How many months until a new customer pays back its acquisition cost?
- SaaS quick ratio calculator
Is MRR growth efficient, or is churn eating the new revenue?
- Van Westendorp calculator
What price range do buyers accept, and where do the price sensitivity meter curves cross?
- Gabor–Granger analysis
At which price on the ladder does revenue peak, and how elastic is demand?
- Viral coefficient (K-factor) calculator
Does each user bring enough new users for viral growth?
- UTM builder
How do I build consistent UTM links for every campaign and channel?
- UTM QR code generator
Which booth, flyer or poster brought visitors — and how do I tag a QR code for each one?
- Email subject line preview
Will the subject line and preheader fit in the inbox on mobile and desktop?
- Funnel conversion calculator
Where do users drop off between steps, and which step is worth fixing first?
- Trial-to-paid conversion calculator
How much revenue does a better trial-to-paid conversion add?
- Retention calculator
How many users stay after day 1, 7 and 30, and what does the curve say?
- A/B test calculator
Is the difference between A and B significant, and how many users does the test need?
When you need them
Unit economics before scaling a channel
Check LTV:CAC and the CAC payback period, and use the quick ratio to see whether new MRR outpaces churn.
Acquisition and virality
Estimate the viral coefficient and cycle time, tag every link with consistent UTM parameters, and make email subject lines fit the inbox.
Conversion and retention
Find funnel leaks, estimate what a better trial-to-paid rate is worth, read retention curves and confirm that experiment wins are significant.
FAQ
Which growth calculators are included?
LTV:CAC, CAC payback period, SaaS quick ratio, viral coefficient (K-factor), trial-to-paid conversion, funnel conversion, retention and A/B test calculators, plus a UTM builder and an email subject line preview.
How is the CAC payback period calculated?
CAC payback in months = CAC ÷ (monthly revenue per customer × gross margin). Under 12 months is healthy for most SaaS; the calculator also adjusts for churn and expansion and compares you with segment benchmarks.
What K-factor means viral growth?
K = invitations per user × invitation conversion rate. Above 1 each user brings more than one new user and growth compounds; below 1 virality only amplifies other channels. Cycle time decides how fast it compounds.
What is a good trial-to-paid conversion rate?
Opt-in trials without a card often convert in the 15–25% range, card-required trials much higher. The calculator shows the revenue effect of moving the rate for your volume and price.
How do I know a growth experiment really worked?
Check significance with the A/B test calculator before rolling out. It also tells you the sample size you need, so you do not stop the test at the first lucky peak.
Are these calculators free?
Yes, with no sign-up and no limits. The data stays in your browser.
Related collections
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