How It Works
This calculator works in 4 steps.
Enter the bottle fill volume
Type the bottle size or the fill line volume.
Enter the label ratio
Type the ratio or rate from the product label.
Read the concentrate amount
The calculator returns mL, fl oz, tablespoons, and teaspoons.
Fill with water
Add concentrate first or last as the label directs, then fill to the line.
The Formula
The formula divides the bottle fill volume by the total ratio parts.
V_conc = V_bottle / (X + 1)tbsp = mL / 14.79; tsp = mL / 4.93- V_bottle:
- Fill volume of the bottle
- X:
- Water parts per 1 part concentrate
A 24 fl oz (710 mL) bottle at 1:10 needs 64.5 mL (2.18 fl oz, about 4.4 tbsp) of concentrate.
Conversion Table
The conversion table gives the concentrate amount for 6 bottle sizes and ratios.
| Bottle | Ratio | Concentrate (mL) | Concentrate (fl oz) | Concentrate (tbsp) |
|---|---|---|---|---|
| 16 fl oz (473.2 mL) | 1:10 | 43.02 mL | 1.455 fl oz | 2.909 tbsp |
| 24 fl oz (709.8 mL) | 1:10 | 64.52 mL | 2.182 fl oz | 4.364 tbsp |
| 32 fl oz (946.4 mL) | 1:32 | 28.68 mL | 0.9697 fl oz | 1.939 tbsp |
| 32 fl oz (946.4 mL) | 1:64 | 14.56 mL | 0.4923 fl oz | 0.9846 tbsp |
| 16 fl oz (473.2 mL) | 1:4 | 94.64 mL | 3.2 fl oz | 6.4 tbsp |
| 24 fl oz (709.8 mL) | 1:20 | 33.8 mL | 1.143 fl oz | 2.286 tbsp |
What Is the Spray Bottle Dilution Calculator?
The Spray Bottle Dilution Calculator is a tool that scales a label ratio to the capacity of a spray bottle and returns the concentrate amount in mL, fl oz, and tablespoons. Common trigger bottles hold 16, 24, or 32 US fl oz (473, 710, or 946 mL).
Spray bottles are often filled to the shoulder, not the brim, so the calculator lets the user enter the real fill volume. Measuring spoons and bottle graduations are coarse, so the calculator rounds to the nearest 1/2 teaspoon and reports the actual ratio after rounding.
Common Uses
There are 5 main uses of this calculator.
Home cleaning
Users fill trigger bottles with all-purpose cleaner.
Auto detailing
Detailers fill bottles with interior cleaner at the label ratio.
Gardening
Gardeners mix foliar products in 1 L sprayers.
Salons and barbershops
Staff refill tool disinfectant bottles.
Facility cleaning stations
Supervisors standardize bottle refills.