Take an equal amount of hair oil and shikakai powder. Add little reetha powder to the mixture. You can use hair oil, reetha and shikakai in solid form also.
Answer Wiki. The short answer is eight -- there are eight U.S. pints in a U.S. gallon, and eight British pints in a British (or Imperial) gallon, which covers any realistic situation this might come up in.
In both the U.S. and British Imperial systems of measurement, a gallon is equal to 4 quarts or 8 pints. However, in the U.S. system, a gallon is 128 fluid ounces, while an imperial gallon is 160 fluid ounces.