Dilution Ratio Calculator
Use this tool to calculate how much concentrate and diluent (usually water) to mix. It works for cleaning solutions, nutrients, detailing chemicals, and lab prep.
A dilution ratio tells you how much concentrate to combine with a diluent to achieve the right working strength. If you've ever asked, “How much product do I mix with water for a 1:10 ratio?” this calculator is designed for exactly that.
How dilution ratios work
Reading a ratio correctly
Most dilution ratios are written as concentrate:diluent. For example, 1:10 means:
- 1 part concentrate
- 10 parts water/diluent
- 11 total parts in the final mixture
That means concentrate is 1/11 of the final volume and diluent is 10/11.
Core formulas
- Total parts = concentrate part + diluent part
- Concentrate needed = final volume × (concentrate part / total parts)
- Diluent needed = final volume × (diluent part / total parts)
If you start with a fixed amount of concentrate, just multiply it by (total parts / concentrate part) to get final mixed volume.
Common dilution ratios at a glance
| Ratio (C:D) | Total Parts | Concentrate % | Use Case Example |
|---|---|---|---|
| 1:1 | 2 | 50.00% | Strong degreasing |
| 1:4 | 5 | 20.00% | General cleaning |
| 1:10 | 11 | 9.09% | All-purpose spray dilution |
| 1:16 | 17 | 5.88% | Car care products |
| 1:32 | 33 | 3.03% | Maintenance cleaning |
| 1:64 | 65 | 1.54% | Light-duty applications |
Practical examples
Example 1: Make 1 liter at 1:10
For 1:10, total parts = 11. If final volume is 1000 mL:
- Concentrate = 1000 × (1/11) = 90.91 mL
- Diluent = 1000 × (10/11) = 909.09 mL
Example 2: You have 250 mL concentrate at 1:4
Total parts = 5. Final mixture = 250 × (5/1) = 1250 mL.
- Concentrate = 250 mL
- Diluent = 1000 mL
Example 3: Make 32 fl oz at 1:16
Total parts = 17. Concentrate needed = 32 × (1/17) = 1.88 fl oz. Add 30.12 fl oz water.
Tips for accurate mixing
- Use the same unit throughout (all mL, all oz, etc.).
- Measure concentrate first, then add diluent.
- Label bottles with ratio and date.
- Use a graduated container or syringe for small volumes.
- When precision matters, avoid rough “eyeballing.”
Volume vs. weight dilution
This calculator uses volume-based dilution, which is standard for most household and commercial liquid products. In lab and industrial processes, some formulas are weight-based. If density differences are significant, weight dilution may be more accurate.
Safety checklist
- Follow manufacturer instructions and SDS guidance.
- Wear gloves and eye protection when required.
- Never mix incompatible chemicals (for example, bleach and ammonia).
- Store diluted solutions in correct containers away from children/pets.
FAQ
Does 1:10 mean 1 part total or 11 parts total?
It means 11 parts total: 1 part concentrate + 10 parts diluent.
Can I use this for any unit?
Yes. The math is unit-agnostic. Just keep everything in the same unit.
Can this calculator help with spray bottles?
Absolutely. Enter the bottle size as your target final volume, choose your ratio, and the calculator returns exactly how much concentrate and water to add.