GREYCOVER
Go grey gracefully — root coverage, color-mix calculators, and silver-hair care that actually works.
From checking your grey-coverage strength and picking a developer volume to mixing color at the right ratio, planning a grow-out, scheduling root touch-ups, and mixing a toner, GreyCover pairs free hands-on calculators with practical guides. Go grey gracefully, or keep your color sharp between salon visits.
Grey Hair Color & Coverage Tools
Free tools for every stage of the process — gray coverage calculator, developer volume calculator, color mix ratio calculator, going gray timeline, root touch-up scheduler, and toner mix calculator.
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.
The Hair Museum
Wander an immersive museum of hair itself — the follicle, keratin, and melanin that build every strand, the biology behind going grey, the chemistry of hair dye and colour coverage from ancient henna to modern bleach, and the everyday tools and trade of hair care, each in its own gallery, so you can get to know the science behind every part of the process: how it works, why it changes with age, and how coverage and colour actually work on the hair you have.
Tour the museum →From the Journal
Guides on covering grey confidently, choosing between permanent and demi-permanent color, mixing color at home, and keeping silver and toned hair looking fresh between salon visits.
What Your Percentage Grey Actually Changes
Below half grey, a demi-permanent blend is usually enough. Above it, or on coarse hair at any percentage, the recommendation flips — and coarse hair flips it early.
How Long Growing Out Grey Actually Takes
The answer is set by one division: the length of coloured hair divided by how fast it grows. Everything else about the decision is strategy for living with that number.
The Silver Strand: Understanding the Biology and Beauty of Aging Hair
The Silver Strand: Understanding the Biology and Beauty of Aging Hair Aging hair is not merely a sign of time passing—it’s a complex interplay of biology, lifestyle, and environment that…
The Science Behind Hair Fibers: Enhancing Density and Confidence for Modern Hairstyling
The Science Behind Hair Fibers: Enhancing Density and Confidence for Modern Hairstyling Hair fibers are revolutionizing the way people approach hair restoration and enhancement, offering a discreet solution for those…
Root Smudge: Mastering Natural Hair Color Transitions Without Chemicals
Root Smudge: Mastering Natural Hair Color Transitions Without Chemicals In recent years, the concept of “root smudge” has gained significant traction among eco-conscious consumers and those seeking sustainable alternatives to…
Keratin Color: Decoding Nature’s Structural Pigment Palette
Keratin Color: Decoding Nature’s Structural Pigment Palette Keratin, often celebrated for its role in building resilient structures like hair, nails, and scales, carries another lesser-known secret: its inherent ability to…
Keep Learning
Plain-language explainers on developer volume, color chemistry, and grow-out timelines, plus practical tips for covering grey at home and keeping silver tones bright between appointments.
Visit the Learn hub →