Hair Dye Mix Ratio Calculator
Work out exactly how much developer to mix with your colour, toner, or bleach. Enter your product amount and ratio to get precise volumes and a safe buffer for full coverage.
Colour & Mixing Details
Enter your hair details and product amount to get the exact developer volume
Used to suggest a typical total product amount for full coverage.
Thicker, denser hair needs more product to saturate fully.
The amount of colour, toner, or bleach powder you’re using, per the tube or tub.
Always confirm the ratio printed on your specific product first.
Extra mixture to prepare so you don’t run out mid-application. (Enter 0 for none.)
Your Mix Breakdown
Exact developer and total mixture volume needed
Enter your hair and product details above, then click Calculate Mix Ratio to see exactly how much developer to add.
Common Hair Colour Mix Ratios
Ratios vary by brand and product type, so always check the packaging — but these are the industry-standard starting points stylists work from.
| Product Type | Typical Ratio | Context / Details |
|---|---|---|
| Permanent Tint | 1 : 1 | Equal parts colour and developer for standard deposit |
| Demi-Permanent Colour | 1 : 1 | Lower-volume developer, gentler processing |
| Toner | 1 : 1 to 1 : 2 | Neutralises brassiness after lightening |
| High-Lift Tint | 1 : 2 | Extra developer needed to lift several levels |
| Bleach Powder | 1 : 1.5 to 1 : 2 | Thicker mix for controlled, even lightening |
Hair Dye Mixing FAQ
Everything you need to know about developer ratios, mixing volumes, and getting even coverage.
Most permanent and demi-permanent tints use a 1:1 ratio, meaning equal parts colour and developer. High-lift tints and some toners typically use 1:2, while bleach powder is usually mixed at 1:1.5 or 1:2. Always check the manufacturer’s instructions first, since ratios vary by brand and product line.
Using more developer than recommended dilutes the colour molecules and can result in a weaker, less accurate shade or patchy, uneven coverage. It can also increase processing time inconsistently across the hair. It’s best to stick to the ratio specified on the product packaging.
Once colour and developer are mixed, oxidation begins immediately and the product should be applied within 30 to 45 minutes for the most accurate result. Mixed hair dye should never be stored or reused, as it loses effectiveness and can develop an unpredictable, uneven tone.
Yes. Higher developer volumes and larger ratios, such as 1:2, generally lift the hair more and may need similar or slightly longer processing times, while lower ratios like 1:1 are formulated for standard deposit-only colour. Always follow the processing time printed on the specific product you are using.
Using too little developer can leave the mixture too thick to distribute evenly through the hair, leading to patchy application and incomplete colour development. It may also mean you run out of product before covering all the hair, so it’s important to prepare enough total mixture in advance.