Hair Dye Ratio Calculator

We’ve created this hair dye ratio calculator helps compute the precise amounts of different hair dye components needed to achieve the desired color result.

1:2.5 Ratio: Commonly used for lightening hair with a more diluted developer.
1:4 Ratio: Often used for very gentle processing, suitable for pastel colors.
1.5:1 Ratio: Provides a richer color with more pigment, often used for deeper shades.
2:2 Ratio: Balances color and developer equally, often used in creative coloring.
3:1 Ratio: A high pigment ratio that can create bold, vibrant colors.
1:1.2 Ratio: Slightly more developer than color, giving a softer result.
2:3 Ratio: Used for specific techniques like balayage where a lighter touch is needed.
1:6 Ratio: Ideal for very subtle highlights or toning, providing a sheer finish.
3:2 Ratio: A balanced approach that allows for both vibrancy and depth in the color.
4:1 Ratio: Used for deep conditioning treatments mixed with color.

Ratio	Total Mixture	Color Amount	Developer Amount
1:1	100ml	50ml	50ml
1:2	90ml	30ml	60ml
1:1.5	125ml	50ml	75ml
2:1:1	80ml	40ml	20ml
1:3	120ml	30ml	90ml
1:2.5	150ml	30ml	75ml
1:4	200ml	40ml	160ml
1.5:1	180ml	90ml	60ml
2:2	160ml	80ml	80ml
3:1	120ml	90ml	30ml
1:1.2	120ml	54.5ml	65.5ml
2:3	150ml	60ml	90ml
1:6	180ml	30ml	150ml
3:2	250ml	150ml	100ml
4:1	200ml	160ml	40ml

Hair Color Mix Formula

The Hair Color Mix Formula is the backbone of successful hair coloring. It typically involves combining three main components:

Color cream: The pigment that gives your hair its new hue
Developer: An oxidizing agent that helps open the hair cuticle and deposit color
Additives: Optional components like toners or treatments

The general formula is:

Total mixture = Color cream + Developer + Additives

Different brands and color types require varying ratios.

Permanent color often uses a 1:1 or 1:1.5 ratio
Semi-permanent color might use a 1:2 ratio
Highlighting formulas could require a 1:3 ratio

For a permanent color with a 1:1 ratio, if you’re using 60ml of color cream, you’d mix it with 60ml of developer.

How to calculate hair dye ratio?

Here’s a step-by-step guide:

Identify the required ratio from the product instructions

Determine the total amount of mixture needed based on hair length and thickness

Divide the total amount by the sum of the ratio parts

Multiply the result by each part of the ratio

Let’s say you need 90ml total mixture for a dye with a 1:2 ratio.

Total parts: 1 + 2 = 3
Amount per part: 90ml ÷ 3 = 30ml
Color amount: 30ml × 1 = 30ml
Developer amount: 30ml × 2 = 60ml

You’d mix 30ml of color with 60ml of developer.

What does 1 part to 2 parts mean in hair color?

The expression “1 part to 2 parts” in hair coloring refers to the proportion of different components in the mixture.

In this case, it means you need twice as much of one component compared to the other.

For a 1:2 ratio with a total mixture of 60ml:

1 part (color): 20ml
2 parts (developer): 40ml

This ratio is common for:

Semi-permanent colors
Some highlighting techniques
Certain toning formulas

What is 1 to 1.5 ratio hair color chart?

A 1 to 1.5 ratio hair color chart is a guide for mixing hair dye where you use one part color to one and a half parts developer.

This ratio is frequently used for:

Permanent hair colors
Full gray coverage
Achieving more vibrant or intense shades

For 100ml of total mixture:

Color: 40ml
Developer: 60ml

How much is 1:1 ratio for hair dye?

The 1:1 ratio for hair dye means equal parts of color and developer are mixed. This is one of the most common ratios used in hair coloring, especially for:

Permanent hair colors
Root touch-ups
Some semi-permanent formulas

If you need 80ml of total mixture:

Color: 40ml

Developer: 40ml

References

L’Oréal Professional: Hair Color Mixing Guide
Cosmoprof: Hair Color Mixing Ratios
Wella Professionals: Color Charm Permanent Gel Hair Color Guide

Related Tools

Hair Dye Ratio Calculator – Mastering the Art of Precise Color Mixing