Hair Color Calculator
Predicted Hair Color Result
Lift Needed
3 L
Exposed Tone
Yellow/Orange
Developer
30 Vol.
| Level Lifted To | Underlying Pigment Exposed | Tone Needed to Neutralize |
|---|---|---|
| Level 4 | Red-Orange | Blue-Green (Ash) |
| Level 5 | Orange | Blue (Ash) |
| Level 6 | Orange-Gold | Blue-Violet (Ash/Violet) |
| Level 7 | Gold | Violet |
| Level 8 | Yellow-Gold | Violet |
| Level 9 | Yellow | Violet |
| Level 10 | Pale Yellow | Pale Violet |
What is a Hair Color Calculator?
A hair color calculator is a specialized tool designed to help both professionals and DIY enthusiasts predict the outcome of a hair coloring process. Unlike simple shade selectors, a true hair color calculator uses the principles of color theory to determine a result based on critical inputs like your starting hair color level, your desired level, and the underlying tones that emerge during lightening. This allows for a much more accurate formulation, helping you select the right products to achieve your goal and avoid unwanted results like brassiness.
The Hair Color Calculator Formula and Explanation
Hair color formulation isn’t just mixing tubes; it’s a science. The core logic revolves around the hair’s “Level” and “Tone.”
Formula: Predicted Result = (Current Level + Lift from Developer) – Neutralization of Underlying Tone
The calculation starts by determining the amount of “lift” needed (Desired Level – Current Level). Each level of lift exposes a specific natural underlying pigment (e.g., lifting from brown exposes orange). To achieve a cool or neutral desired tone, you must use a complementary color to neutralize this exposed warmth. Our how to formulate hair color guide explains this in detail.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Current Level | The starting lightness or darkness of the hair. | Level | 1 (Black) to 10 (Lightest Blonde) |
| Desired Level | The target lightness or darkness. | Level | 1 to 10 |
| Developer Volume | The strength of the peroxide used to lift color. | Volume (Vol.) | 10, 20, 30, 40 |
| Underlying Tone | The warm pigment exposed when lifting hair. | Color | Red, Orange, Gold, Yellow |
Practical Examples
Example 1: Going from Light Brown to Light Blonde
- Inputs: Current Level: 5 (Light Brown), Desired Level: 8 (Light Blonde), Desired Tone: Ash.
- Calculation: This requires 3 levels of lift (8 – 5). Lifting a level 5 exposes orange-gold undertones. A 30 Volume developer is needed. To get an “Ash” result, a blue/violet-based toner is required to neutralize the warmth.
- Result: Level 8 Ash Blonde, achieved by using a level 8 Ash color with 30 Volume developer.
Example 2: Depositing Darker Color
- Inputs: Current Level: 9 (Very Light Blonde), Desired Level: 6 (Dark Blonde), Desired Tone: Neutral.
- Calculation: This is a color deposit, not a lift. A 10 Volume developer is sufficient. To avoid a hollow or muddy result, a “filler” tone like Gold or Copper may be needed before applying the final color, as the light hair lacks the necessary warm undertones.
- Result: Level 6 Neutral Dark Blonde, achieved by first filling with a gold tone, then applying a Level 6 Neutral color with 10 Volume developer. See our hair color levels and tones explained article for more on fillers.
How to Use This Hair Color Calculator
- Select Your Current Level: Match your current hair to the levels provided, from 1 (Black) to 10 (Lightest Blonde).
- Choose Your Desired Level: Pick the level you wish to achieve.
- Pick a Desired Tone: Select the final hue you want (e.g., Ash for cool, Gold for warm).
- Assess Hair Porosity: Determine if your hair is resistant (Low), normal, or porous (High). High porosity hair grabs cool tones more strongly and may process darker.
- Review the Results: The calculator will predict your final color, the lift required, the underlying tone you must account for, and the recommended developer strength. Use this as a guide for your color formulation.
Key Factors That Affect Hair Color Results
- Hair Porosity: High porosity hair absorbs color quickly and can go darker or ashier than intended. Low porosity is resistant and may require longer processing or a stronger developer.
- Hair Texture (Fine/Coarse): Fine hair lightens faster and processes color more quickly than coarse hair.
- Previous Artificial Color: Color does not lift color. If you have existing dye on your hair, you may need to use a color remover before attempting to go lighter. Our guide on what developer to use for hair color covers this.
- Percentage of Gray: Gray hair has no natural pigment and can be resistant. Special formulations are often needed for full gray coverage.
- Developer Strength: Using a developer that is too strong can cause unnecessary damage, while one that is too weak won’t provide enough lift.
- Application and Processing Time: Even application and correct timing are crucial for avoiding patchy results.
Frequently Asked Questions (FAQ)
The number indicates the level (lightness/darkness from 1-10), and the letter or second number indicates the tone (e.g., A for Ash, G for Gold).
It’s the natural warm tone (red, orange, yellow) exposed when you lighten hair. It must be neutralized to achieve a cool or neutral result.
While this calculator is based on professional principles, it can help you understand the process. However, box dyes offer limited control over developer strength and tone.
Brassy tones appear when the lightening process didn’t lift the hair light enough or when the toner used was not strong enough to neutralize the exposed underlying pigment.
Use 10 Volume for depositing color, 20 Volume for 1-2 levels of lift or gray coverage, 30 Volume for 2-3 levels of lift, and 40 Volume for 3+ levels of lift (professional use recommended).
A “level” is how light or dark a color is. A “tone” is the hue of the color, such as warm (gold, red) or cool (ash, violet).
High porosity hair can absorb color too quickly, often resulting in a cooler or darker-than-expected outcome. Low porosity hair is more resistant to color.
Permanent hair color will not lift existing artificial hair color. You would need to use a specialized color remover or lightener (bleach) first. This calculator is most accurate for virgin hair or for going darker over colored hair.