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28 marketing tools that show their work — every result comes with the formula, a worked example and a shareable URL.
Paid media
ROAS CalculatorCalculate ROAS from ad spend and revenue, and find the break-even ROAS your campaigns must clear given your gross margin.CPM CalculatorCalculate CPM (cost per 1,000 impressions) from ad spend and impressions, or work out how many impressions a budget buys at a given CPM.CPC CalculatorCalculate cost per click from spend and clicks, and the maximum CPC you can afford given your conversion rate and the value of a conversion.CPA CalculatorCalculate cost per acquisition (or cost per lead) from spend and conversions, and find the maximum CPA you can pay before a conversion stops being profitable.CTR CalculatorCalculate click-through rate (CTR) from clicks and impressions for ads, search results, emails or any placement that is shown and clicked.
E-commerce & unit economics
Margin CalculatorCalculate gross margin percentage, markup percentage and profit per unit from cost and selling price. Understand the difference between margin and markup.CAC CalculatorCalculate customer acquisition cost from marketing and sales spend, then compare it with lifetime value to get the LTV:CAC ratio and payback period.LTV CalculatorCalculate customer lifetime value from average order value, purchase frequency, customer lifespan and gross margin — both as revenue and as gross profit.Break-even CalculatorFind how many units you need to sell, and how much revenue that is, to cover fixed costs — using price, variable cost per unit and contribution margin.
Analytics & measurement
ROI CalculatorCalculate return on investment (ROI) as a percentage and in absolute profit from what you spent and what you got back.Conversion Rate CalculatorCalculate conversion rate from conversions and visitors, sessions or clicks — and see how many visitors each conversion currently costs you.Sample Size CalculatorWork out how many visitors each variant of an A/B test needs to detect a given lift in conversion rate at your chosen confidence and power — and how long that takes at your traffic.A/B Test Significance CalculatorEnter visitors and conversions for two variants to get the conversion rates, relative uplift, z-score, p-value and whether the difference is statistically significant.
SEO
Slug GeneratorTurn any title into a clean URL slug: lowercase, hyphenated, diacritics removed (ç, ğ, ş, ü, ö, ı and more), trimmed to a length that fits the address bar.SSR CheckerCheck whether a URL delivers its content in the HTML or builds it with JavaScript. Fetches the page as a browser and as Googlebot without running JS, detects the framework and rendering mode (Next.js, Nuxt, React SPA, WordPress…), counts the words, links and headings a crawler sees, and flags bot blocking or dynamic rendering. Free, no signup.Google SERP SimulatorSee how your page will look in Google search results before you publish. Type a title, meta description and URL — or pull them from a live page — and get a pixel-accurate desktop and mobile preview, pixel and character counters, the exact character where Google cuts the text, and a list of findings. Free, no signup, nothing stored.UTM BuilderBuild UTM-tagged campaign URLs that GA4 reads correctly. Presets for Google Ads, Meta, LinkedIn, TikTok, email, SMS and more; automatic lower-casing and space handling; a prediction of the GA4 default channel group each source/medium pair reports in; bulk mode with CSV and Excel export. Free, no signup, nothing stored.robots.txt TesterTest a robots.txt against any URL path and crawler: fetch it from a site or paste it, pick Googlebot, Bingbot, GPTBot, ClaudeBot, PerplexityBot or a custom user-agent, and see the exact rule that allows or blocks the path — plus a per-crawler summary, syntax warnings and Sitemap lines. RFC 9309 matching, runs in your browser, nothing stored.Hreflang GeneratorPaste your language and URL pairs, pick an x-default, and get a validated hreflang set as <link rel="alternate"> tags, sitemap xhtml:link entries and an HTTP Link header. Checks ISO 639-1 language, ISO 15924 script and ISO 3166-1 region codes, catches en-uk, region-only and three-letter codes, duplicate tags, relative URLs and a missing x-default — every page lists the whole cluster, so return links are guaranteed. Runs in your browser, nothing stored.Schema Markup GeneratorFill in a short form and get valid JSON-LD structured data for nine schema.org types: Organization, LocalBusiness, Article, Product, FAQPage, HowTo, BreadcrumbList, Event and WebSite (sitelinks search box). Fields are marked required or recommended as in Google's rich-result documentation; URLs, dates, prices and codes are checked as you type; the output is ready to paste into <head> and to test in Google's Rich Results Test. Runs in your browser, nothing stored.Redirect CheckerPaste up to 20 URLs and see every hop of the redirect chain: status code, target, Cache-Control and time per hop, the final URL and status, loops, chains longer than three hops, temporary 302/307 in place of 301, http→https→www double chains, meta-refresh and JavaScript redirects in the final page, a canonical that disagrees with the final URL — and, optionally, whether Googlebot is sent somewhere else than a browser. Export as CSV. Nothing stored.On-Page SEO CheckerEnter a URL and, optionally, a target keyword. The checker fetches the page as Chrome and as Googlebot and reports what the raw HTML says: title and meta description with character and pixel length, robots meta and X-Robots-Tag, canonical, H1 count and heading outline with skipped levels, image alt coverage, internal and external links and nofollow share, Open Graph and Twitter card, hreflang validity, JSON-LD types, lang, viewport, charset, word count and keyword density and placement. No score — a list of what passed, what to look at and what is only information. Nothing stored.SEO AuditEnter a URL and the crawler checks up to 200 pages the way a search engine's first pass would: status codes, noindex and canonical directives, missing or duplicate titles and descriptions, missing H1s, thin pages, images without alt, redirect chains, broken links, orphan pages, robots.txt and sitemap coverage. Every page gets the same on-page checks as the single-page checker; the report groups them by issue and by page. No score, no fabricated priorities — findings with counts. Download as CSV. Nothing is stored beyond 24 hours.Sitemap GeneratorEnter a URL and the crawler follows internal links (up to 200 pages), keeps only the pages a search engine could index — status 200, no noindex, canonical pointing at itself — and writes a plain XML sitemap you can download or copy. It also reads the sitemap the site already publishes and shows both gaps: indexable pages missing from it, and sitemap URLs the crawl never reached. No lastmod, priority or changefreq are invented. Nothing is stored beyond 24 hours.Broken Link CheckerEnter a URL and the crawler follows internal links (up to 200 pages) and reports every one that fails: 404s and other 4xx, 5xx, timeouts and fetch errors. Each broken link comes with the pages that point to it and the anchor text, so you can fix the link or the page, not just know that something is wrong. Only your own site is requested — links to other sites are counted, never fetched. Download as CSV. Nothing is stored beyond 24 hours.Internal Link CheckerEnter a URL and the crawler maps the internal link graph of up to 200 pages: how many pages link to each URL, how many links each page sends out, how many clicks each page sits from the start, and which pages nobody links to — orphans that only the sitemap knows about. The table sorts by incoming links so the pages your own site treats as unimportant are at the bottom. Download as CSV. Nothing is stored beyond 24 hours.Content Term CoveragePaste 3–10 competitor URLs — the pages that rank for the query you care about — and, optionally, your own page URL or draft text. The tool fetches each page, extracts its main content, counts one- to three-word terms in the language you pick, and lists the terms that appear in at least 60 % of the competitor pages, with the count per page and the count in yours. Terms you never use are listed separately; word counts and H1–H3 outlines sit alongside. No SERP scraping, no content score — a coverage matrix you can read and export as CSV. Nothing is stored beyond 24 hours.
Benchmarks
BenchmarksAdvertising, ecommerce, email and SMS benchmarks by industry — every figure carries its publisher, sample, data period and a link to the report it came from.Google Ads benchmarksSearch advertising benchmarks by industry: average CTR, cost per click, conversion rate and cost per lead, from named reports with their samples and data periods.Facebook Ads benchmarksMeta advertising benchmarks by industry and objective: click-through rate, cost per click, CPM, conversion rate, cost per lead and ROAS, each with its source and sample.TikTok Ads benchmarksTikTok advertising benchmarks for ecommerce brands: CPM, click-through rate, conversion rate, cost per acquisition and ROAS by category, plus social CPM across platforms.B2B advertising benchmarksB2B paid social benchmarks by platform: cost per lead, cost per click, CPM, click-through and click-to-lead rates from 153 advertisers and $57.6M of spend.Ecommerce conversion benchmarksEcommerce conversion rate, average order value, add-to-cart and cart abandonment benchmarks, each with the sample, market and period the publisher states.Email marketing benchmarksEmail benchmarks by industry for campaigns and automated flows: open rate, click rate, click-to-open, unsubscribe rate and placed-order rate, with samples and caveats.SMS marketing benchmarksEcommerce SMS benchmarks from 321 million messages: click-through and conversion rates for campaigns against automation, plus revenue per message and deliverability.