Chemistry
Bleach Dilution Calculator
Find how much concentrated bleach and water to combine for a target available-chlorine strength.
Your inputs
Change any value to update the result instantly.
Bleach to measure out
200 mL
Water to add
9,800 mL
Product strength
50,000 ppm
Dilution factor
50 ×
Target strength
1000 ppm (0.1% available chlorine)
Always use the available-chlorine figure printed on the product label; household bleach loses strength with age. Never mix bleach with acids or ammonia.
What this calculator does
Calculates the volume of concentrated hypochlorite product and water needed for a target available-chlorine strength.
What your result means
The measured volume of bleach that, made up to the final volume with water, gives the requested parts per million of available chlorine.
Formula and working
V₁ = (C₂ × V₂) ÷ C₁ ; V_water = V₂ − V₁
- 1
Collect the inputs
Available chlorine in the product (C₁) = 5 % by mass; Target strength (C₂) = 1,000 ppm; Final volume to prepare (V₂) = 10 L
- 2
Apply the formula
V₁ = (C₂ × V₂) ÷ C₁ ; V_water = V₂ − V₁
- 3
Result
Bleach to measure out = 200 mL
Frequently asked questions
Symbols and assumptions
- C1
- Available chlorine in the product
- C2
- Target available chlorine
- V2
- Final volume prepared
- • The product strength entered is available chlorine by mass.
- • Dilute solutions have a density close to 1 g/mL, so 1% equals 10,000 ppm.
Sources and review
Reviewed 2026-09-22 · Next review 2027-09-22
- • Household bleach loses strength during storage. Never mix bleach with acids or ammonia. This is a dilution calculation, not a disinfection protocol.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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