Hair Porosity Product Ratio
Calculator
Results
- Total parts in the mix
- 4
- Protein treatment (ml)
- 15
- Moisturising treatment (ml)
- 45
- Protein treatment (%)
- 25
- Moisturising treatment (%)
- 75
Beauty and personal care results
| Total parts in the mix | 4 |
| Protein treatment (ml) | 15 |
| Moisturising treatment (ml) | 45 |
| Protein treatment (%) | 25 |
| Moisturising treatment (%) | 75 |
formula-map diagram
- Total parts in the mix
- 4
- Protein treatment (ml)
- 15
- Moisturising treatment (ml)
- 45
- Protein treatment (%)
- 25
- Moisturising treatment (%)
- 75
Beauty and personal care relationship
Formula
protein mL = total × protein parts ÷ (protein + moisture parts)= 4
Note
This is a simplified model: it applies the mixing ratio, dilution, application rate, growth rate or price you enter to plain arithmetic. Mixing figures use the ratio on your own product's label, because developer, powder and colour ratios differ from brand to brand. Dilutions use C1 x V1 = C2 x V2 and the standard conversion of 20 drops per millilitre; real droppers vary with the oil's viscosity and the dropper itself. Sunscreen amounts use the Du Bois body surface area formula with the application rate you enter, and the SPF figure uses the textbook approximation protection time = SPF x unprotected burn time, which is a simplification: sweat, water, towelling, UV index, altitude, reflection and your own skin all shorten it in practice. Hair, nail and hair-removal timings assume a constant linear growth rate, which varies by person, body area, age, season and health. Costs ignore taxes, sales and waste. Always patch test a new product on a small area first and follow the product label and any professional instructions. This is not dermatological, cosmetic or medical advice; see a dermatologist or a qualified professional for anything affecting your skin, scalp or health.
More in Beauty and personal care
See all →Frequently asked questions
What is hair porosity and why does it change the protein-to-moisture ratio needed?+
Porosity describes how easily the hair cuticle allows moisture and other substances to pass in and out; low-porosity hair has a tightly closed cuticle that resists moisture absorption, while high-porosity hair has a more open or damaged cuticle that absorbs moisture quickly but also loses it quickly, so each type needs a different balance of protein (to strengthen) and moisture (to hydrate) in a product routine.
How does the calculator determine the recommended protein-to-moisture ratio?+
It typically maps your reported porosity level (low, medium, or high, often self-assessed via a simple test like how hair behaves when floated in water) to a general recommended balance, leaning more toward moisture-focused products for low porosity and a more even or protein-inclusive balance for high porosity, which tends to need more structural reinforcement.
Why can too much protein in a routine be counterproductive?+
Excess protein relative to moisture can leave hair feeling stiff, brittle, and prone to breakage, a state often called 'protein overload,' because protein fills in gaps in the damaged cuticle but does not by itself provide the flexibility that moisture and lipids contribute; balance, not maximum protein, is the goal.
Can hair have different porosity in different sections, and how should that affect the ratio?+
Yes, it is common for hair ends (which are older and more weathered) to have higher porosity than hair closer to the scalp, so some people apply a more protein-inclusive product to the ends while using a lighter, more moisture-focused product near the roots, rather than a single uniform ratio for the whole head.
How often should the porosity assessment be redone, since hair condition changes over time?+
Because chemical treatments, heat styling, sun exposure, and simple aging of the hair shaft can all increase porosity over time, it is worth reassessing porosity periodically (for example every few months or after a significant treatment like coloring or a keratin service) rather than assuming it stays fixed indefinitely.