Convert a color amount when switching developer volumes.
The color amount is scaled by the ratio of the original to the new developer volume to match the recipe. Switching developer volume without adjusting changes lift and tone, so a quick conversion keeps results predictable.
Hair Color Conversion
Adjusted = color amount x (from vol / to vol)
Adjusted = color amount x (from vol / to vol) The color amount is scaled by the ratio of the original to the new developer volume to match the recipe.
Switching developer volume without adjusting changes lift and tone, so a quick conversion keeps results predictable.
This calculator takes 3 inputs: Color amount, From volume, To volume. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.