Bleach Dilution Calculator
Calculate the exact volume of bleach needed to make a solution at your desired concentration in ppm. Supports regular household bleach (5.25%), ultra bleach (8.25%), and industrial concentrations. Uses the dilution formula C₁V₁ = C₂V₂.
Proper bleach dilution is essential for effective disinfection without waste or safety risks. The active ingredient in bleach is sodium hypochlorite (NaOCl), and its concentration determines the antimicrobial effectiveness.
Common Concentrations:
- 50-200 ppm: Food-contact surface sanitizing (FDA recommended)
- 500-1000 ppm: General household disinfection, bathroom surfaces
- 2000-5000 ppm: Blood and body fluid spills (CDC/WHO recommended)
- 5000-10000 ppm: Norovirus decontamination, high-risk areas
The Formula:
C₁V₁ = C₂V₂, where C₁ is the stock bleach concentration (converted from % to ppm: 1% = 10,000 ppm), V₁ is the volume of bleach to add, C₂ is the desired ppm, and V₂ is the total volume.
Important Safety Notes:
- Never mix bleach with ammonia (creates toxic chloramine gas) or acids (releases chlorine gas)
- Prepare fresh solutions daily as bleach degrades over time
- Stock bleach loses potency after opening; check the expiration date
- Use in well-ventilated areas and wear appropriate protective equipment
- Bleach is corrosive to metals, fabrics, and some surfaces at high concentrations