Bleach Dilution Calculator
Find bleach to add for a target ppm.
Dilute concentrated bleach to a target sanitizing concentration.
How the Math Works
The Bleach Dilution Calculator uses the formula C₁V₁ = C₂V₂, where C represents concentration and V represents volume. Here, C₁ is the stock bleach concentration in parts per million (ppm), derived by multiplying the bleach's percentage strength by 10,000 (e.g., 5% bleach = 50,000 ppm). V₁ is the volume of stock solution needed, C₂ is the target ppm, and V₂ is the total volume of the diluted solution. This formula ensures precise dilution by balancing the amount of active ingredient (bleach) before and after mixing.
Practical Applications
To use the calculator, input the stock bleach percentage (e.g., 5%) and your desired final ppm (e.g., 100 ppm) along with the total volume of the diluted solution (e.g., 10 gallons). The formula calculates the exact volume of stock bleach required (V₁ = (C₂ × V₂) / C₁). For example, a 5% bleach (50,000 ppm) diluted to 100 ppm in 10 gallons requires 0.02 gallons (about 2.56 ounces) of stock solution. Always mix thoroughly and verify calculations before application.
Day-to-Day Use
This calculator simplifies everyday tasks like pool maintenance, surface sanitization, or water treatment by ensuring safe and effective bleach concentrations. Overly strong solutions can be corrosive or hazardous, while too weak solutions may fail to eliminate pathogens. By providing exact measurements, it saves time, reduces waste, and guarantees optimal performance for cleaning, disinfection, or aquarium upkeep—making it a reliable tool for both professionals and DIY users.
Worked example
8.25% bleach to 200 ppm in 1 L → ~2.4 mL bleach.
FAQ
Sanitizing strength?
Food-contact surfaces often use ~100–200 ppm.