Dilution Ratio Calculator
Figure out exactly how much concentrate and water to mix for a target dilution. Works in two modes: ratio mode (1:X) for cleaning products and household chemicals, or concentration mode (C1V1 = C2V2) for lab and industrial dilutions.
Dilution ratios tell you how much concentrate to mix with water. Getting the ratio wrong can make a cleaning solution too weak to work or too strong and potentially damaging.
Understanding Dilution Ratios
A ratio of 1:10 means 1 part concentrate to 10 parts water. The total solution is 11 parts. To make 1 liter (1000 mL) at 1:10:
- Concentrate: 1000 / 11 = 90.9 mL
- Water: 1000 - 90.9 = 909.1 mL
Common Cleaning Dilution Ratios
| Product Type | Typical Ratio | Concentrate per Liter |
|---|---|---|
| All-purpose cleaner | 1:10 | 90.9 mL |
| Glass cleaner | 1:20 | 47.6 mL |
| Heavy degreaser | 1:4 | 200 mL |
| Floor cleaner | 1:30 | 32.3 mL |
| Disinfectant (general) | 1:10 | 90.9 mL |
| Disinfectant (medical) | 1:5 | 166.7 mL |
The C1V1 = C2V2 Method
For precise dilutions in a lab or industrial setting, use the concentration-volume formula:
C1 x V1 = C2 x V2
- C1 = stock (concentrated) solution concentration
- V1 = volume of stock solution needed
- C2 = desired final concentration
- V2 = desired final volume
Worked Example
You have 30% hydrogen peroxide and need 500 mL of 3% solution:
V1 = (C2 x V2) / C1 = (3 x 500) / 30 = 50 mL
Mix 50 mL of 30% H2O2 with 450 mL of water.
Safety Tips
- Always add concentrate to water, not water to concentrate (especially for acids)
- Use the manufacturer's recommended dilution ratio
- Stronger is not always better; too-concentrated solutions may leave residue or damage surfaces
- Label diluted solutions with the date and ratio used