63 free tools · no signup
Free calculators for digital marketers — formula included, no signup.
Every calculator shows its math, teaches the metric, and benchmarks your result against typical industry ranges. Answer first, email capture never.
- The formula, in the open
- Every page shows the exact expression and defines each variable, so you can rebuild it in a spreadsheet.
- A worked example
- Real numbers walked through step by step, so you can check your own inputs against a known-good case.
- Benchmarks in context
- Typical ranges by business type, with the caveats stated — directional guidance, not false precision.
Start here
If you only run one number this quarter, run one of these — they answer whether your spend is actually working.
CAC
Customer Acquisition Cost
Find out exactly what it costs you to win one new customer — and whether that cost is sustainable.
LTV:CAC ratio
LTV:CAC Ratio
The single number that tells you if your growth spend is actually sustainable.
ROAS
Return on Ad Spend
Find out exactly how much revenue you're generating for every dollar spent on ads.
CVR
Conversion Rate
Find what percentage of your visitors actually do the thing you want — the multiplier sitting underneath every other marketing number.
The fundamentals
Search all 63 →Conversion / CRO
Conversion Rate
Find what percentage of your visitors actually do the thing you want — the multiplier sitting underneath every other marketing number.
Paid Ads / PPC
Cost Per Click
Find what you're actually paying for each visit — and whether that price leaves room for a profit once they land.
Paid Ads / PPC
Click-Through Rate
See what share of the people who saw your ad actually clicked it — the fastest read on whether your creative and targeting match.
Paid Ads / PPC
Cost Per Acquisition
Work out what one completed conversion costs you — the number every bid strategy is ultimately steering toward.
Core Business Metrics
Customer Churn Rate
Measure how fast customers are leaving — the leak that decides whether acquisition builds anything or just refills the bucket.
Paid Ads / PPC
Cost Per Mille (CPM)
Work out what a thousand impressions actually costs you — the common currency for comparing awareness spend across platforms.
Core Business Metrics
Marketing ROI
Turn marketing spend and the revenue it produced into a single percentage you can defend in a budget meeting.
Paid Ads / PPC
Cost Per Lead
Price a lead honestly, then check it against what a lead is worth once your close rate is applied.
Social / Influencer
Social Engagement Rate
Measure how much of an audience actually reacts — the number that separates a real community from a follower count.
Paid Ads / PPC
Break-Even ROAS
Find the minimum ROAS you need just to avoid losing money — before chasing anything higher.
Email Marketing
Email Marketing ROI
Find out exactly what your email program is returning for what it costs to run.
Core Business Metrics
Net Promoter Score
Convert survey responses into the one sentiment number executives recognise — and see how the scoring actually works.
By category
Core Business Metrics
12The numbers that decide whether marketing is actually making money: acquisition cost, lifetime value, payback period, churn, and the ratios finance teams check first. Start here if you only have time for one calculator.
Paid Ads / PPC
16Bid math, budget math, and profitability math for Google Ads, Meta, and every other auction-based channel — what a click is worth to you, what you can afford to pay for it, and where a campaign stops being profitable.
SEO / Content
8Put a dollar figure on organic search. Value the traffic you already earn, forecast what a ranking improvement is worth, work out when a content investment pays itself back, and size how much content a traffic goal actually needs.
Conversion / CRO
8Before you buy more traffic, find out what the traffic you have is already worth. Test sizing, significance, funnel drop-off, checkout leaks, and the revenue hiding behind a one-point conversion-rate lift.
Email Marketing
5Email is measured in revenue per send, not open rate. Value a subscriber, value the list, size the return on a campaign, and check whether sending more often actually earns more.
Social / Influencer
6Rate cards are guesses until you run the numbers. Price a partnership on real engagement, compare creators on cost per engagement, and work out what a social campaign returned.
Ecommerce
4Store economics: average order value, repeat purchase revenue, free-shipping thresholds, discount profitability, and the cost of an abandoned cart.
Agency / Freelance Pricing
4Price the work so it's worth doing. Set an hourly rate that covers non-billable time, size a retainer, mark a project up correctly, and find out which clients are actually profitable.