Free tools
Everything you need to sanity-check the numbers
Use these calculators and generators on their own — no accounts, no exports. When you are tired of stitching spreadsheets every Monday, Duct connects your stack and delivers the same discipline as a weekly intelligence brief.
- No signup
- Runs in your browser
- Built by the Duct team
Love the math, hate the manual weekly grind?
Duct reads across GA4, ads, product analytics, CRM, and more — so you get what changed, what drove it, and what to do next. Same rigour as these tools, running while you ship.
Get early access →SaaS metrics & revenue
Benchmark health and model growth the way finance and growth leads actually argue about it — with numbers, not vibes.
SaaS Metrics Benchmark Calculator
Churn, LTV:CAC, payback, trial-to-paid — scored against industry medians with colour-coded clarity.
Open calculator → CalculatorCAC / LTV Calculator
Unit economics in one view: CAC, LTV, ratio, and payback with benchmark context.
Open calculator → CalculatorMRR Growth Rate Calculator
Net MRR growth, CMGR, and the growth rate you need to hit a target — fast.
Open calculator →Paid media efficiency
Planning spend, pacing, or post-mortems — these strip the guesswork out of CTR, CPM, CPC, CPA, ROAS, and ROI.
CTR Calculator
Click-through rate, projected clicks, and the CTR you need to hit volume goals.
Open calculator → CalculatorCPM Calculator
Cost per thousand impressions, spend scenarios, and efficiency targets.
Open calculator → CalculatorCPC Calculator
Cost per click and what spend looks like at your target CPC.
Open calculator → CalculatorCPA Calculator
Cost per acquisition, conversion scenarios, and budget-safe CPAs.
Open calculator → CalculatorROAS Calculator
Return on ad spend as a revenue multiple, target ROAS gaps, and margin-aware contribution ROAS.
Open calculator → CalculatorMarketing ROI Calculator
ROI, profit, and revenue scenarios for campaign decisions in minutes.
Open calculator →Tracking, social & reporting
Ship clean measurement links, templates your team will actually use, and engagement benchmarks you can defend in a deck.
UTM Builder
GA4-friendly campaign links with live preview and validation — copy-ready.
Build UTMs → TemplateWeekly Marketing Brief Generator
Role- and stack-aware weekly report structure — fill the right slots per tool.
Generate template → CalculatorEngagement Rate Calculator
Engagement by followers, reach, or impressions — apples-to-apples across posts.
Open calculator →FAQ
About these tools
Do I need an account?
No. Every calculator and generator on this page runs in your browser without a Duct login. If you join the beta later, that is separate — these stay free.
How is this related to Duct the product?
The same team builds both. These tools help you answer one-off questions quickly; Duct answers them continuously by connecting your product, marketing, and revenue stack into weekly briefs and alerts.
Will you store my inputs?
Calculations happen locally in your session — we do not persist your numbers on our servers for these free tools. For Duct beta, connection and brief delivery work under our privacy policy.