Paid Ads

Paid ads performance calculators for ROAS, CPA, break-even targets, and budget decisions.

Best for Performance marketers, growth leads, and analytics teams managing spend against profit.
How to use this hub

Paid ads decisions get better when you start from the job to be done: set spend guardrails, diagnose creative and funnel weakness, or decide whether attribution is trustworthy enough to scale.

Choose a task path first, then use the linked calculator or guide to go deeper.

Quick checks before you compare tools
  • Keep attribution window, conversion definition, and revenue basis stable before comparing ROAS or CPA.
  • Pair platform metrics with business metrics such as MER, margin, and incremental lift before scaling spend.
  • Treat creative metrics as diagnostic inputs, not proof of profitable growth on their own.

Choose a task

Start from the question you are trying to answer, then jump into the calculator or guide that gets you moving fastest.

Scaling and profitability

Use these when you are deciding how far to scale without hiding weak unit economics behind platform reporting.

Set spend guardrails before you scale

Translate margin targets into a usable ROAS threshold so budget decisions stay tied to contribution, not vanity metrics.

Watch diminishing returns as spend rises

Use top-down and incremental lenses before you treat a stable platform ROAS as proof you should keep increasing budget.

Creative and measurement diagnostics

Use these when clicks, conversions, and reported attribution no longer tell a clean story on their own.

Troubleshoot the funnel when clicks stop converting

Work through the funnel from traffic quality to landing-page economics before blaming only the creative or the platform.

Decide whether attribution is trustworthy

Compare reporting models before you scale on a signal that might just be windowing, overlap, or retargeting bias.

Start here

All calculators

Paid Ads
A/B Test Sample Size Calculator
Estimate sample size per variant for a conversion rate A/B test given baseline CVR, MDE, significance, and power.
Paid Ads
Break-even CPM Calculator
Compute break-even and target CPM from CTR, CVR, AOV, and contribution margin assumptions.
Paid Ads
Break-even CTR Calculator
Compute the CTR required to break even (and hit a target) given CPM, CVR, AOV, and contribution margin.
Paid Ads
Break-even CVR Calculator
Compute the CVR required to break even (and hit a target) given CPM, CTR, AOV, and contribution margin.
Paid Ads
Break-even ROAS Calculator
Estimate the break-even ROAS based on contribution margin assumptions.
Paid Ads
Click-through Conversion Rate Calculator
Calculate click-through conversion rate (click-to-conversion CVR) and estimate required clicks for target conversions.
Paid Ads
CPL to CAC Calculator
Convert cost per lead (CPL) into CAC using lead-to-customer rate (and compute targets).
Paid Ads
Incrementality Lift Calculator
Estimate incremental conversions, incremental ROAS, and incremental profit from a holdout test.
Paid Ads
Marginal ROAS Calculator
Estimate diminishing returns and find the profit-maximizing ad spend from a simple response curve.
Paid Ads
Max CPC Calculator
Compute break-even and target CPC (and optional CPM) from CVR, AOV, and contribution margin assumptions.
Paid Ads
MER Calculator
Calculate MER (Marketing Efficiency Ratio / blended ROAS) and estimate break-even and target MER from margin assumptions.
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
ROAS Calculator
Calculate Return on Ad Spend (ROAS) and estimate contribution profit after ad spend.
Paid Ads
ROI Calculator
Calculate Return on Investment (ROI) for a campaign or project.
Paid Ads
Target CPA from LTV Calculator
Translate LTV and contribution margin into a target CPA (and break-even CPA) for paid acquisition.
Paid Ads
Target ROAS Calculator
Estimate a target ROAS to cover variable costs plus a desired margin buffer.

Guides

Browse all guides
Prefer to browse instead of following a task path? Start with CAC , ROAS, or cash runway.