29 marketing calculators that show their work.
Paid media, unit economics, testing, email, SEO, and growth. Every tool is plain arithmetic you can check by hand. No sign-up, no AI, and nothing you type leaves your browser.
Paid Media
- CPM Calculator Calculate cost per thousand impressions, total spend, or impressions delivered from any two of the three.
- CPC Calculator Work out cost per click from spend and clicks, or solve for the budget a click target requires.
- CTR Calculator Calculate click-through rate from impressions and clicks, and see how it compares to channel benchmarks.
- CPA Calculator Calculate cost per acquisition and the break-even CPA your margins can actually support.
- ROAS Calculator Calculate return on ad spend, break-even ROAS from your margin, and the target ROAS for a profit goal.
- Ad Budget Calculator Forecast impressions, clicks, conversions, and CPA from a budget and your CPM, CTR, and conversion rate.
Unit Economics
- CAC Calculator Calculate customer acquisition cost, blended and paid, plus CAC payback in months.
- LTV Calculator Calculate customer lifetime value from revenue, margin, and churn, and check your LTV to CAC ratio.
- Marketing ROI Calculator Calculate marketing ROI and ROMI on gross margin, not just revenue, across one or several campaigns.
- Churn Rate Calculator Calculate customer and revenue churn, retention, and expected customer lifetime.
- Marketing Budget Calculator Size a marketing budget from revenue and growth stage, then split it across channels with editable percentages.
Conversion & Testing
- Conversion Rate Calculator Calculate conversion rate from visitors and conversions, and see what a lift would be worth in extra conversions and revenue.
- A/B Test Significance Calculator Check whether an A/B test result is statistically significant, with p-value, confidence, and observed lift.
- A/B Test Sample Size Calculator Calculate how many visitors an A/B test needs per variant to detect a given lift at a chosen confidence and power.
- Funnel Conversion Calculator Model a multi-stage funnel, see where the biggest drop-off is, and test what fixing one stage does to the bottom line.
Email & Newsletter
- Email Marketing Metrics Calculator Calculate open rate, click rate, click-to-open rate, bounce, unsubscribe, and revenue per email from a single send.
- Newsletter Sponsorship Rate Calculator Price a newsletter sponsorship from subscribers, open rate, and a target CPM, or reverse a quoted rate into its effective CPM.
- Email List Growth Calculator Project list size over time from new subscribers per month, unsubscribe rate, and list decay.
- Email Subject Line Checker Check subject line length, inbox truncation on mobile and desktop, spam-trigger words, and punctuation habits that hurt deliverability.
SEO & Content
- SEO ROI Calculator Estimate traffic, conversions, and revenue from ranking a keyword, using position-based click-through curves.
- Title & Meta Description Preview Preview how a title tag and meta description render in Google results, with pixel-width truncation warnings.
- Reading Time Calculator Count words, characters, and sentences, and estimate reading and speaking time for any piece of content.
- Social Engagement Rate Calculator Calculate engagement rate by reach, by impressions, and by followers for any social post or account.
- UTM Builder Build UTM-tagged campaign URLs with consistent naming and one-click presets.
Growth & Strategy
- Growth Bridge Decompose a change in revenue, ROAS, or blended conversion rate into the exact drivers that moved it.
- Growth Rate Calculator Calculate period-over-period growth, CAGR, and doubling time, and project a metric forward at a given rate.
- TAM SAM SOM Calculator Size a market top-down: total addressable, serviceable, and obtainable market from population, price, and share assumptions.
- Share of Voice Calculator Calculate share of voice against competitors from mentions, impressions, or spend, and compare it to share of market.
- Margin & Markup Calculator Convert between margin and markup, price a product from cost and target margin, and see what a discount does to profit.
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