Colour Mixing Calculators
Hair colour formulation, developer ratios, toner mixing, bleach calculations and grey coverage tools for precise colour results.
Hair Colour Mix Calculator
Calculate precise colour-to-developer ratios for any hair colour formulation.
Developer Ratio Calculator
Work out the correct developer-to-colour ratio for different application types.
Toner Mix Calculator
Calculate toner and developer quantities for post-bleach toning services.
Bleach Mix Calculator
Determine the right bleach powder to developer ratio and total quantity needed.
Colour Correction Calculator
Estimate colour correction steps, products and processing time needed.
Root Touch-Up Calculator
Calculate colour and developer quantities for root regrowth applications.
Balayage Calculator
Estimate lightener quantities and foil usage for balayage and freehand techniques.
Colour Depth Calculator
Determine the resulting depth level when mixing two colour shades together.
Peroxide Volume Calculator
Convert between peroxide volumes and percentage strengths for hair developers.
Grey Coverage Calculator
Adjust colour formulation ratios for optimal grey and white hair coverage.
10 free calculators in Colour Mixing
Hair Colour Mixing Fundamentals
Accurate colour mixing is the foundation of every successful hair colour service. Whether you are formulating a full head colour, blending toners after lightening, or adjusting a formula for grey coverage, getting the ratios right is essential for predictable, repeatable results.
Most permanent hair colours use a 1:1 mixing ratio with developer (oxidant), while high-lift tints typically require 1:2. Semi-permanent colours may need no developer at all. Developer volumes range from 10 vol (3%) for deposit-only colour to 40 vol (12%) for maximum lift. Understanding these relationships is critical for safe, effective colour services.
The International Colour Chart (ICC) system uses levels 1-10 to describe depth (lightness/darkness) and a secondary number for tone direction. Level 1 is black, level 10 is lightest blonde. When mixing two shades, the resulting depth is the average of the two levels, weighted by the proportion of each shade used. Our calculators help you work through these formulations accurately.