My Chemical-Free House

A Guide to Creating a Healthy Home

Dilution Table for Hydrogen Peroxide

How to Dilute 35%, 34% or 29%, 12%, 10%, and 6% Hydrogen Peroxide (H2O2) Down to 3%, 1%, 0.5%, 0.2% and 0.1%

This method is not perfectly precise, especially at higher concentrations of HP, because we are using the 1 part HP as 1 part water. It still is accurate enough for cleaning purposes.

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a pair of latex gloves, safety goggles, ear plugs, and a respirator

Personal Safety Equipment Should be Used!

Goggles, gloves, and protective clothing. (Source & Source).

Dilution Table

Dilute 35% Hydrogen Peroxide

1 part 35% H2O2 to 1 part water (math is 35/2) = 17.5% Hydrogen Peroxide

1 part 35% H2O2 to 2 parts water is 35/3 = 11.7% Hydrogen Peroxide

1 part 35% H2O2 to 3 parts water is 35/4 = 8.75% Hydrogen Peroxide

1 part 35% H2O2 to 4 parts water is 35/5 = 7% Hydrogen Peroxide

1 part 35% H2O2 to 5 parts water is 35/6 = 5.83% Hydrogen Peroxide

1 part 35% H2O2 to 6 parts water is 35/7 = 5% Hydrogen Peroxide

1 part 35% H2O2 to 7 parts water is 35/8 = 4.4% Hydrogen Peroxide

1 part 35% H2O2 to 8 parts water is 35/9 – 3.9% Hydrogen Peroxide

1 part 35% H2O2 to 9 parts water is 35/10 = 3.5% Hydrogen Peroxide

1 part 35% H2O2 to 10 parts water is 35/11 = 3.18% Hydrogen Peroxide

1 part 35% H2O2 to 13 parts water is 35/14 = 2.5% Hydrogen Peroxide

1 part 35% H2O2 to 34 parts water is 35/35 = 1% Hydrogen Peroxide

1 part 35% H2O2 to 69 parts water is 35/70 = 0.5% Hydrogen Peroxide

Another way to make 1 gallon of 3% Hydrogen Peroxide: Mix 1 and a quarter cup of 35% HP with 14 and three quarter cups of water.

Dilution Table

Dilute 34% Hydrogen Peroxide

1 part 34% H2O2 to 4 parts water = 6.8% Hydrogen Peroxide

1 part 34% H2O2 to 4.5 parts water = 6% Hydrogen Peroxide

1 part 34% H2O2 to 8 parts water = 3.7% Hydrogen Peroxide

1 part 34% H2O2 to 9 parts water = 3.4 % Hydrogen Peroxide

1 part 34% H2O2 to 10 parts water = 3% Hydrogen Peroxide

Make 1 gallon of 3% Hydrogen Peroxide: Mix just a touch under 1.5 cups 34% HP with 14.5 cups of water.

Dilution Table

Dilute 29% Hydrogen Peroxide

1 part 29% H2O2 to 1 part water = 14.5% Hydrogen Peroxide

1 part 29% H2O2 to 2 parts water = 9.6% Hydrogen Peroxide

1 part 29% H2O2 to 3 parts water = 7.25% Hydrogen Peroxide

1 part 29% H2O2 to 4 parts water = 5.8% Hydrogen Peroxide

1 part 29% H2O2 to 8 parts water = 3.2% Hydrogen Peroxide

1 part 29% H2O2 to 9 parts water = 2.9% Hydrogen Peroxide

How to Make a Gallon of 3% Hydrogen Peroxide: Mix 1 cup, 9 tablespoons, and 2 teaspoons of 29% HP with 14 cups, 6 tablespoons, and 1 teaspoon of water.

Dilution Table

Dilute 27% Hydrogen Peroxide Down

1 part 27% H2O2 to 1.5 parts water = 10.8% Hydrogen Peroxide

1 part 27% H2O2 to 8 parts water = 3% Hydrogen Peroxide

Dilution Table

Dilute 12% Hydrogen Peroxide Down

1 part 12% H2O2 to 1 part water (12/2) = 6% Hydrogen Peroxide

1 part 12% H2O2 to 3 part water (12/4) = 3% Hydrogen Peroxide

1 part 12% H2O2 to 11 part water (12/12) = 1% Hydrogen Peroxide

Make 1 gallon of 3% Hydrogen Peroxide: Mix 4 cups of 12% HP with 12 cups of water.

Dilution Table

Dilute 10% Hydrogen Peroxide

1 part 10% H2O2 to 0.5 parts water (10/1.5) = 6.6% Hydrogen Peroxide

1 part 10% H2O2 to 2 part water (10/3) = 3.3% Hydrogen Peroxide

1 part 10% H2O2 to 2.5 parts water (10/3.5) = 2.85% Hydrogen Peroxide

How to make a gallon of 3% Hydrogen Peroxide: Mix 4.5 cups of 10% Hydrogen Peroxide with just under 11.5 cups of water.

Dilution Table

Dilute 6% Hydrogen Peroxcide

1 part 6% H2O2 to 1 part water (6/2) = 3% Hydrogen Peroxide

1 part 6% H2O2 to 2 parts water (6/3) = 2% Hydrogen Peroxide

1 part 6% H2O2 to 3 parts water (6/4) = 1.5% Hydrogen Peroxide

1 part 6% H2O2 to 4 parts water (6/5) = 1.2% Hydrogen Peroxide

1 part 6% H2O2 to 5 parts water (6/6) = 1% Hydrogen Peroxide

Dilution Table

Dilute 3% Hydrogen Peroxide (10 Volume)

1 part 3% H2O2 to 1 part water (3/2) – 1.5% Hydrogen Peroxide

1 part 3% H2O2 to 2 parts water (3/3) = 1% Hydrogen Peroxide

1 part 3% H2O2 to 5 parts water (3/6) = 0.5% Hydrogen Peroxide

1 part 3% H2O2 to 14 parts water (3/15) = 0.2% Hydrogen Peroxide

1 part 3% H2O2 to 29 parts water (3/30) = 0.1% Hydrogen Peroxide

1 part 3% H2O2 to 69 parts water (3/70) = 0.04% Hydrogen Peroxide

Non-Toxic Disinfectant for Viruses

In order to kill viruses, the CDC recommends three different options. The least toxic and safest one for most people is hydrogen peroxide at at least 0.5%, left on the surface for one minute. Alcohol is also safe for many people to use. Source

Where to Buy Hydrogen Peroxide During the Pandemic

You can find higher concentrations at hydroponic stores and sometimes at gardening stores and hardware stores.

You may be able to find hydrogen peroxide at 12% on Amazon. If they are not sold out the next place I would look is online hydroponic stores.

You can also find some concentrations at beauty supply stores (usually 12%).

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Reader Interactions

Comments

  3. Lisa

    How would I dilute 34.5% hydrogen peroxide down to 27%? I need it for wood bleaching purposes but our local pool supplier only has 34.5%

    Reply

  4. Johann Schmuck

    can you please help me with tis question?. I have 4000 ml of h2o water how many ml of 34% h202 I have to add to make 3% h2o2. thanks

    Reply

  5. David

    hi i have a small business i was trying to work out how much 50% h202 to add to my 2000 litre tank to make 3% h202 for healthy lettuce plants .kind Regards dave wade

    Reply

    • Corinne

      depends if you’re adding it on top of the 2000 or 2000 is the capacity of the tank.

      You can calculate for 100% HP and then double it. 120 L of 50% HP added to 1880 L is 3% solution and 2000 L

      Reply

    • Corinne

      1 part 50% to .42857 part water is 50/1.42857 = 35%
      So for every gallon that you have you want to add 0.42857 of a gallon which is 1622.31 millilitres (which is 6.857 cups)
      6.857 cups x 15 = 102.85 cups

      Reply

  7. Elie

    What %hp is traditionally used in Laundry instead of laundry bleach? Looking to use hp in the washing machine bleach compartment.

    Reply

  8. Jennifer

    Hello. I have a gallon of 27% pool peroxide. Can you include a chart for this percentage and also mixing volumes.

    Reply

  10. Davr

    Just go some 50 percent hp for hydroponics would 2 ml of hp mixed with 20 litres of water be ok for plants

    Reply

  12. Anastasialuc

    Does diluting the HP reduce the shelf life and/or efficacy for cleaning purposes?
    Thanks so much

    Reply

  13. Sarah

    Thank you so much for this collaborative and supportive information! I just want to double check that I’ve got this right (math feels shaky). Is this right:

    I want to achieve a .04% dilution of HP…so I should take 1 part of 3% HP and add it to 69 parts distilled water?

    So I could take 1 teaspoon of 3% HP and then add 69 teaspoons of HP. The resulting solution would be .04 HP?

    Thank you so much and God bless the spirit of people helping people!

    Reply

  14. Peggy Karp

    Thanks very much for the dilution table. Very helpful!

    I want to make an even more dilute solution. So if I am starting with 1 teaspoon of 3% H202, how many teaspoons, of water do I need to get a .04% solution? Thanks!

    Reply

  15. Tracey Fraser

    Not understanding any of this ! The question as I understand it , is how do I get a .1% dilution from a 10 volume hydrogen peroxide solution? A simple answer please.

    Reply

  17. Jeff Hyett

    I apologize if this question can’t be addressed here. I bought a gallon of 35% food grade HP about 5 years ago and opened it last year. I used about a cup of it. The white plastic container has been closed with the cap since. How do I determine the concentration now?

    Reply

  21. Rakesh

    Do All Types of Cosmetic Peroxide up to 12 % (Developer) are restricted in Air & Sea Transportation.
    Can you quote any document where it is clarified that up to 9% o5 up to 12 % Peroxide (Developer) used on Hair with Coloring / Bleaching are exempted from DGR/Hazmat with standard packaging
    like Small packaging of 1000 ml (Retail Packaging)
    Hoping to hear from you very soon.
    Rakesh

    Reply

  22. Rakesh Kumar

    Hi, we are a non profit organisation working as an eye care service provider. we have to disinfect the spectacle frames used by our patients during the selection of frame. Can we use Hydrogen Peroxide to disinfect the spectacle frames, Also we have 6.5% hydrogen peroxide but we require 0.5%. How can we dilute it.
    Thanks

    Reply

  25. Mike

    Hi,

    Just want to ask so that I have got it correct:

    If I put 1dl of 10% Hydrogen Peroxide in a glas and then add 2dl distilled water I will get a concentration of 3.3% Hydrogen peroxide, correct? (1 part 10% to 2 part water (10/3) = 3.3% Hydrogen Peroxide).

    There is a bottle available where I live that is 9.5% concentration of Hydrogen peroxide so seem perfect. It is cheaper to buy the 9.5% bottle than the 3% bottle since it is basically 3 times more hydrogen peroxide in the 9.5% bottle (only $2.79 difference).

    Thanks

    Reply

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