Spray Mix Calculators Gallon Sprayer Mix Calculator
Gallon Sprayer Mix Calculator
Enter your sprayer size in gallons and a dilution ratio like 1:16, 1:32, or 1:64. Get the exact concentrate amount (in fl oz, mL, plus tbsp/tsp) and how much water to add to fill the tank.
Need a more flexible tool? Spray Mix Calculator · Have a backpack sprayer? Backpack Sprayer Calculator · Small bottle? Spray Bottle Calculator · Check your rate: Oz Per Gallon Calculator.
Mix a Gallon Sprayer
This page is optimized for 1–5 gallon sprayers. Enter gallons and your ratio value X and we’ll calculate concentrate + water.
Common ratios (per 1 gallon)
Quick reference for a 1 gallon sprayer. For other tank sizes (2 gal, 3 gal, 4 gal, 5 gal), use the calculator above.
| Ratio | 1 Gallon | 2 Gallon | 4 Gallon | 5 Gallon |
|---|---|---|---|---|
| 1:16 | 7.53 fl oz | 15.06 fl oz | 30.12 fl oz | 37.65 fl oz |
| 1:32 | 3.88 fl oz | 7.76 fl oz | 15.52 fl oz | 19.39 fl oz |
| 1:64 | 1.97 fl oz | 3.94 fl oz | 7.88 fl oz | 9.85 fl oz |
| 1:128 | 1.0 fl oz | 2.0 fl oz | 4.0 fl oz | 5.0 fl oz |
Values are concentrate amounts in fl oz. For mL, tbsp/tsp, and other tank sizes, use the calculator above.
Tip: For 1:X (concentrate:water), concentrate fraction is 1 ÷ (1 + X). The rest is water.
FAQ
How much concentrate do I add to a 1 gallon sprayer for 1:32?
For a 1 gallon final mix at 1:32 (concentrate:water), you need about 3.88 fl oz of concentrate (≈ 115 mL). Use the calculator above for exact values and tablespoon/teaspoon conversions.
How much concentrate do I add to a 2 gallon sprayer for 1:32?
For a 2 gallon final mix at 1:32, it’s about 7.76 fl oz of concentrate (≈ 229 mL). Enter 2 gallons and 32 to calculate the exact water-to-fill amount.
How much concentrate do I add to a 4 gallon sprayer for 1:16?
For a 4 gallon final mix at 1:16, it’s about 30.12 fl oz of concentrate (≈ 891 mL). Use the calculator for precise results and the remaining water to fill the tank.
Is 64:1 the same as 1:64?
Not always. 1:64 commonly means 1 part concentrate to 64 parts water. 64:1 often means 64 parts water to 1 part concentrate. Use the ratio format selector to match the label wording.
Does this calculator replace pesticide label instructions?
No. This page provides mixing math and unit conversions only. Always follow the product label for approved uses, application rates, timing, and safety guidance.
How the math works
For a ratio written as 1:X (concentrate:water), the concentrate fraction of the final mix is 1 ÷ (1 + X). Multiply that fraction by your total sprayer volume to get concentrate. The remaining volume is water.