Build a Facebook Ads ROI Calculator with Claude Code
Advertising analytics tool that calculates return on investment for Facebook ad campaigns. Digital marketers and advertisers use it to measure campaign profitability and optimize ad spend.
The Claude Code prompt
Build a Facebook Ads ROI Calculator web app. People search for "facebook ads roi calculator" about 100 times a month, plus related searches like "facebook ads calculator", "facebook roi calculator", "fb ads roi calculator". The goal is a tool that ranks for those searches and makes money. What it should do: Create a Facebook Ads ROI calculator with campaign spend and revenue inputs. Calculate ROI, ROAS, cost per conversion, and profit margins. Include campaign comparison tools and optimization suggestions. Add industry benchmarks and goal setting features. Focus on getting accurate ROI calculations working first. How to build it: 1. Read this folder first. If it is empty, set up Next.js (App Router, TypeScript, Tailwind). Write a short PLAN.md with the pages, components, any library or API you need, and what you are leaving for later. Then build. 2. Put the tool itself on the homepage so a visitor can use it within seconds, with no sign-up. Do the processing in the browser where you can, so it is fast and cheap to run. Look at how Facebook Ads Manager, AdEspresso, Hootsuite do it and make ours simpler and faster. 3. Make it rank. Use "facebook ads roi calculator" in the title tag, H1 and meta description. Under the tool, add a short how-to and an FAQ with FAQPage schema, and add a sitemap and robots.txt. Scaffold these programmatic pages from one template and a data file: /facebook-ads-roi-[industry], /fb-ads-calculator-[business-type], /social-media-roi-[campaign-type]. 4. Monetisation: Freemium: 15 calculations/month, $10/mo unlimited + benchmarks. Add a pricing page and the free usage limit, and leave Stripe checkout as a clearly marked stub with the environment variables it needs. 5. Run it locally and test the main flow end to end, including edge cases like empty input and very large files. Fix what breaks, then finish with a summary of what works, what is stubbed and how to deploy it to Vercel.
Paste it into Claude Code in an empty folder. It plans first, so read PLAN.md and steer before it starts building.
What people search for
Who you're up against
- Facebook Ads Manager : Official Facebook advertising platform
- AdEspresso : Facebook ads optimization platform
- Hootsuite : Social media management with ad analytics
Pages that can rank
One template, many long-tail pages:
- /facebook-ads-roi-[industry]
- /fb-ads-calculator-[business-type]
- /social-media-roi-[campaign-type]
- /facebook-advertising-[objective]
Content to write
- How to Calculate Facebook Ads ROI for Better Campaigns
- Facebook Advertising ROI Optimization Strategies
- Digital Marketing ROI: Measuring Facebook Ad Success
- Facebook Ads Budget Planning and ROI Analysis
How it makes money
Freemium: 15 calculations/month, $10/mo unlimited + benchmarks
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