Marketing tools

The math behind the dashboard.

Free calculators for the marketing decisions worth running real numbers on. UTM, ROAS, CPC/CPM, margin, payment fees, conversion rate, and break-even are live.

Tools

UTM builder

Tag campaign URLs for Google Analytics, Mixpanel, Amplitude. The five standard UTM fields, with shareable templates.

ROAS calculator

Return on ad spend with break-even ROAS for any margin. Most '4× ROAS!' announcements are unprofitable below 30% margin.

CPC + CPM calculator

Cost per click + cost per thousand impressions, plus CTR cross-conversion. Useful for comparing channels.

Profit margin

Cost / price → margin %, plus markup. Reverse mode: target margin → required price.

Payment fee calculator

Net after fees for Stripe / PayPal / Square. Inverse: what to charge to net $X. Custom rates supported.

Conversion rate calculator

Conversions / visitors → conversion rate with Wilson score 95% CI. Honest math for small samples.

Break-even calculator

Units and revenue to cover fixed costs from your price and variable cost per unit, with contribution margin.

Why a hub for these?

Most marketing calculators are gated behind a signup, an email, or a popup. The math is trivial — these are five-line formulas most marketers know — but the UX of every "free" calculator adds friction. We're shipping the same calculations as one-tab static pages, no signup, no email gate, nothing about what you computed sent anywhere.

For each tool we'll also ship the explanation of when the single-number answer is useful versus misleading — most of these formulas have edge cases that the calculators that own this space gloss over.

Don't see the tool you need?

Request a tool — 30-second form straight to the founder. No marketing list, no data tracking, no upsell.