Bleach Mixing Ratio
Calculator
Results
- Developer needed (g)
- 60
- Total mix (g)
- 90
- Powder as a share of the mix (%)
- 33.333333
- Developer hydrogen peroxide (%)
- 5.555555
Beauty and personal care results
| Developer needed (g) | 60 |
| Total mix (g) | 90 |
| Powder as a share of the mix (%) | 33.333333 |
| Developer hydrogen peroxide (%) | 5.555555 |
formula-map diagram
- Developer needed (g)
- 60
- Total mix (g)
- 90
- Powder as a share of the mix (%)
- 33.333333
- Developer hydrogen peroxide (%)
- 5.555555
Beauty and personal care relationship
Formula
developer = powder × ratio= 60
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 the typical bleach powder to developer ratio and why?+
A common standard is 1:1.5 or 1:2 (powder to developer), which ensures the lightening powder is fully activated and kept fluid enough to apply evenly; too little developer leaves powder unactivated and clumpy, while too much over-dilutes the lightening power.
Does a higher-volume developer mean I should use less of it?+
No, developer volume (10, 20, 30, 40 vol) refers to the concentration of hydrogen peroxide and how much lift or lightening power it provides, not how much of it to mix; the mixing ratio (powder to developer) stays governed by the bleach manufacturer's instructions regardless of which volume developer you choose.
Why does my bleach mixture feel too thick or too runny?+
A too-thick mixture usually means too little developer was used relative to powder, making it hard to spread evenly and risking patchy lift, while a too-runny mixture, from too much developer, can drip, be harder to control, and process less predictably; sticking to the ratio on the product packaging avoids both issues.
Can I adjust the ratio to make the bleach less damaging?+
Increasing developer relative to powder beyond the manufacturer's recommendation does not meaningfully reduce damage and instead just weakens and destabilizes the mixture; damage is more effectively controlled by choosing a lower-volume developer or reducing processing time, not by deviating from the recommended mixing ratio.
How much total mixture do I need for a full head versus a partial application?+
This scales with hair length and density much like standard hair colour, with full-head bleach applications on long, thick hair often needing well over 100g of total mixture, while a root touch-up or partial section needs proportionally less; always mix in the same fixed ratio regardless of the total batch size.