Bleach and Developer Ratio Calculator
Formula for Bleach and Developer Ratio
Table of Contents
What is the Bleach and Developer Ratio?
The bleach and developer ratio shows how much developer you need to mix with bleach powder. This ratio controls the strength of the lightning process. Most stylists use a 1:2 ratio. This means 1 part bleach powder and 2 parts developer.
Why the Right Ratio Matters
The right ratio helps lighten hair without damage. Too little developer makes the bleach thick and hard to apply. Too many developers can cause burns or uneven results. A balanced mix lifts the hair color evenly and safely.
Common Bleach to Developer Ratios
1:1 Ratio
A 1:1 ratio means equal parts bleach and developer. This ratio gives strong lifting power. Stylists use this for dark hair or quick results. It works fast, but can dry out the hair if not monitored.
1:1.5 Ratio
This ratio is good for medium lifting. It works well on hair that has been dyed before. It spreads easily and gives even results. It is a safer choice for damaged or fine hair.
1:2 Ratio
This is the most common ratio in salons. It works well for most hair types. It gives steady lift and smooth application. Most boxed bleaches also use this ratio.
How Developer Volume Affects the Result
Developer comes in volumes like 10, 20, 30, and 40. Each volume changes how much the bleach lifts the hair color.
- 10 Volume: Very gentle. Lifts up to 1 level. Good for slight changes or toning.
- 20 Volume: Standard choice. Lifts 1–2 levels. Best for light brown to dark blonde.
- 30 Volume: Stronger lift. Lifts 2–3 levels. Works on darker hair.
- 40 Volume: Very strong. Lifts 3–4 levels. It can damage hair if not used carefully.
How to Use the Bleach and Developer Calculator
Use our bleach and developer ratio calculator to save time and get the right mix. Input the amount of bleach in grams or milliliters. The calculator will show the correct amount of developer based on your chosen ratio. This tool is useful for salon professionals and home users.
Example Calculation
If you want to use 50g of bleach with a 1:2 ratio, enter 50 as the bleach amount. The calculator will tell you to mix it with 100g of developer.
Tips for Mixing Bleach and Developer
Always Measure
Use a scale for powder and a measuring cup for liquid. Guessing can cause mistakes. Precise measurement gives better results and protects the hair.
Mix Well
Use a plastic bowl and brush. Stir until the mix is smooth. Avoid lumps because they can cause uneven coloring.
Use Gloves and Ventilation
Bleach can irritate skin and eyes. Always wear gloves and work in a place with good airflow.
Test on a Small Section
Before applying to the full head, test on a small piece of hair. This shows how the hair will react to the bleach.
Safety Precautions
- Do not use metal bowls or tools.
- Do not leave bleach in hair for too long.
- Always follow the product instructions.
- Do not bleach damaged or chemically treated hair without care.
Recommended Developer Volumes by Hair Color
| Hair Color | Suggested Developer Volume | Ratio |
|---|---|---|
| Dark Brown/Black | 30 or 40 Volume | 1:2 |
| Medium Brown | 20 or 30 Volume | 1:1.5 or 1:2 |
| Light Brown | 20 Volume | 1:2 |
| Blonde | 10 or 20 Volume | 1:2 |
Final Thoughts
The bleach and developer ratio is key to healthy, lightened hair. Use the right ratio for your hair type and lifting needs. Most users find the 1:2 ratio safe and effective. Try our calculator to get quick, accurate results. Always follow safety steps to avoid damage.
Using bleach the right way can give you bright, even color without harming your hair. Measure, mix, and apply carefully. This will help you get the best results every time.