Free SaaS metrics & paid ads calculators
MetricKit helps you quickly compute CAC, LTV, ROAS, payback period, and more - with clear formulas and assumptions.
Popular calculators
Browse all →Paid Ads
ROAS Calculator
Calculate Return on Ad Spend (ROAS) and estimate contribution profit after ad spend.
Paid Ads
Break-even ROAS Calculator
Estimate the break-even ROAS based on contribution margin assumptions.
Paid Ads
Target ROAS Calculator
Estimate a target ROAS to cover variable costs plus a desired margin buffer.
Paid Ads
Paid Ads Funnel Calculator
Model CPM -> CTR -> CVR to estimate CPC, CPA, ROAS, and profit per 1,000 impressions (with margin and variable costs).
Paid Ads
ROI Calculator
Calculate Return on Investment (ROI) for a campaign or project.
SaaS Metrics
CAC Calculator
Calculate Customer Acquisition Cost (CAC) from total acquisition spend and new customers.
Popular guides
Browse all →ROAS: What it is and how to use it
A practical guide to ROAS (Return on Ad Spend): definitions, formulas, benchmarks, and common pitfalls.
CAC: how to calculate Customer Acquisition Cost (formula + examples)
Customer acquisition cost (CAC) explained: formula, what to include, and practical CAC metrics (paid vs fully-loaded) you can trust.
LTV: How to estimate Lifetime Value (and when not to)
A practical LTV guide: quick models vs cohort-based LTV, unit consistency, and pitfalls with churn and gross margin.
CAC Payback Period (Months to Recover CAC): definition, formula, benchmarks
Learn how to calculate CAC payback (months to recover CAC) using gross profit, plus benchmarks and levers to improve it.
How to calculate ARPU (Average Revenue Per User)
ARPU calculation guide: definition, formula, worked example, and how to use ARPU with retention and LTV.
Bookings vs ARR: what ARR means (and what it doesn't)
Bookings vs ARR explained: what ARR is (and isn't), plus how it differs from bookings and cash receipts.
Popular definitions
Browse all →What you get
- Clear formulas and assumptions (so results are explainable).
- No login required.
- Fast pages and simple navigation.