How it's calculated
water = concentrate × N; total = concentrate + water; dilution factor = total ÷ concentrate
ratio 1 : N (N = parts water per 1 part concentrate). Final concentration % = concentrate ÷ total × 100; ppm = % × 10,000.
Common values
| Ratio | Concentrate % | Per 1 gal mix |
|---|---|---|
| 1:4 | 20% | 25.6 oz + water |
| 1:10 | 9.1% | 11.6 oz + water |
| 1:32 | 3.0% | 4 oz + water |
| 1:64 | 1.5% | 2 oz + water |
Common questions
Does 1:10 mean one part in ten or one part to ten?
Here it means one part concentrate to ten parts water, for eleven parts total. That gives roughly 9.1 percent strength.
Can I solve it from the concentrate I already have?
Yes. Enter the concentrate volume instead of the final volume and the calculator tells you how much water to add.