How to dilute H2o2 to 3%.
35% to 3% - 1 oz of 35% with 11 oz of distilled water equal to 3%.
17.5% to 3% - 1 oz of 17.5% with 5.5 oz of distilled water equal to 3%.
12% to 3% - 1 oz of 12% with 4 oz of distilled water equal to 3%.
8% to 3% - 1 oz of 8% with 3 oz of distilled water equal to 3%.
6 % to 3% - 1 oz of 6% with 1 oz of distilled water equal to 3%.