Beauty & Cosmetics
Hair dye ratio calculator
How much developer to mix based on your hair color ratio.
- Instant
- Free
- Private (processed locally)
- No sign-up
Dose color and developer
Enter the amount of hair color and the ratio: the tool computes the developer to add and the total mix.
Tips
- Respect the ratio on the leaflet
- Weigh rather than eyeball
- Mix just before applying
- Always do an allergy patch test first
Example
| Input | Value |
|---|---|
| Hair color | 60 g |
| Ratio | 1:1.5 |
| Developer | 90 g |
| Total mix | 150 g |
Indicative. Follow the manufacturer’s instructions. 100% local calculation.
Frequently asked questions
Which ratio should I use?
Follow the instructions: often 1:1.5 for permanent colors, 1:2 for some lightening techniques.
Can I measure in grams or ml?
Yes, the ratio is the same. A kitchen scale is more accurate than eyeballing.
What about leftovers?
The mix oxidizes: prepare only what you need and discard the rest, do not keep it.