What it is
Fertilizer Calc is a browser-based calculator for hydroponic fertilizers.
You specify a target nutrient profile — it finds a combination from a built-in
database of 659 commercial fertilizers that matches. Splits the recipe into
A/B tanks to prevent precipitation.
No backend. Runs entirely in the browser.
Demo: progl.github.io/fertilizer
Features
- 659-fertilizer catalog with NPK composition, micronutrients, shop links
- Auto recipe matching for a target nutrient profile
- Manual mode: pick fertilizers yourself, get gram amounts
- A/B tank compatibility (Ca cannot mix with phosphates)
- pH correction with acids
- Balance diagnostics with color highlights
- Printable recipe, QR code for sharing
- Onboarding tour for new users
- localStorage persistence
Stack
Vanilla JS, HTML, Bootstrap 5, GitHub Pages