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 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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Goggles, gloves, and protective clothing. (Source & Source).
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.
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.
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.
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
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.
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.
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
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%).
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
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
I have 15 gallons of 50% and what to get it down to 35%
how much water do I need ?
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
What %hp is traditionally used in Laundry instead of laundry bleach? Looking to use hp in the washing machine bleach compartment.
Hello. I have a gallon of 27% pool peroxide. Can you include a chart for this percentage and also mixing volumes.
what do you typically dilute pool peroxide down to?
I don’t; I bought it specifically to dilute for cleaning purposes… Mold and all purpose. I’d like to dilute to 11% and 3%.
Everything I’ve found gives me dilutions and measurements for 35% and 29%, and not 27%.
ok I added it to the post
Joanna Mora says
How do I make 12% Hp
Just go some 50 percent hp for hydroponics would 2 ml of hp mixed with 20 litres of water be ok for plants
I’m trying to dilute 3% h2o2 to 1%to add to one gallon of water.
Does diluting the HP reduce the shelf life and/or efficacy for cleaning purposes?
Thanks so much
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!
Peggy Karp says
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!
just added it to that table
Peggy Karp says
Thanks very much!
Tracey Fraser says
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.
10 volume is 3% hydorgen perooxide. Follow the table for the dilution to 1%.
So if I want to take a 35% HP down to a .1% dilution it would be 1 part HP to 349 parts water?
Thanks for your assist!
Jeff Hyett says
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?
Balloon and graduated cylinder
If I dilute 5ml of 3% Peroxide with 500ml of distilled water what concentration do I have?
That’s 1 part hydrogen peroxide to 100 parts water.
How to I dilute 3% peroxide down to 0.2%?
How to I dilute 3% peroxide down to 0.2%?
Don’t do this.
Would it be Ok to use tap water for dilution?
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 Kumar says
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.
Koran Lanier-newman says
Can you take hydrogen peroxide with blood pressure meds and kidney disease?
The table is meant to be dilution for cleaning with HP.
How much water and salt do I use to dilute 3% Hydrogen Peroxide to 1%
Mercola recommends 1tsp salt to 1 pint H2O (i’d say boiled distilled water) for a 9% saline solution.
Kristy Jones says
How does this answer the question? I already knew how to dilute water to make saline. What I can’t find for the life of me, is the formula to dilute the 3% hydrogen peroxide to the recommended 0.1% to add to the saline water…! (and I’ve tried for an hour now)
29 to 1 to achieve .1% solution. 7.25 tsp normal saline to .25 tsp hp
So if my limited math is correct, to make 1 pint (96 tsp) would be 3.3 tsp of 3% HP.
I’ve added 0.1 percent dilution
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).
OH! The best website I have found to purchase 35% HP is. Comes wonderfully packaged, VERY price conscious.
Thank you so very very much! Simplest, best information about this that I have seen!
Bhaskar Ramu says
Can you add dilution table for 10-12% Hydrogen Peroxide as well. Thanks
Dilute means basically to reduce strentgh. You can not go from 10% to 12% by mixing with water
I believe he’s asking for dilution tables for 10% and 12% as well. Just a guess though.
nevermind i see its already there!
Lexi Rodrigo says
Just what I needed. Thank you very much!