Grey Hair Color & Coverage Calculators
Free, practical tools for going grey gracefully — check your coverage strength, mix color and developer accurately, plan your grow-out, schedule root touch-ups, and keep silver tones bright.
Gray Coverage Calculator
Find the right color type, developer volume, and mix strength for your grey percentage, hair length, and texture.
Developer Volume Calculator
Match the developer volume — 10, 20, 30, or 40 — to depositing color, covering grey, or lifting a set number of levels.
Color Mix Ratio Calculator
Get exact color and developer amounts for a standard 1:1 or high-lift 1:2 mix, scaled to your hair length.
Going Gray Timeline
See how many months it takes to grow out colored hair to your natural grey, with milestones along the way.
Root Touch-Up Scheduler
Work out how many weeks you can go between root touch-ups from your growth rate and root tolerance.
Toner Mix Calculator
Get exact toner and developer amounts, plus a process-time guide, for neutralizing brassiness on grey or silver hair.