I don't think you can because Newton is a unit of measurement of Force while black powder is a substance used in guns.
100 newtons = 10.2 kilograms
To convert Newtons to pounds, divide the Newton value by 4.45. So, 25 Newtons would be approximately 5.62 pounds (25 divided by 4.45).
I'm sure there is a formula for that, but I was never good with math, The problem is CC is volume and grain is weight. I would take my 5 cc of powder and pour it into an adjustable powder measure, then adjust it until the powder is level with the top. I just did it and it turns out to about 12 grains of black powder.
To convert pounds to newtons, multiply by 4.448. So, 32 pounds is equal to 142.336 newtons.
To convert newtons to pounds, divide the number of newtons by 4.448. Therefore, 245 newtons is approximately 55.06 pounds.
To convert pounds to newtons, multiply the weight in pounds by 4.448. Therefore, 150 pounds is equivalent to 667.2 newtons.
1 kilonewton = 1,000 newtons: kilonewtons x 1,000 = newtons
Technically, you can't convert kilograms (a mass unit) into newtons (a force unit).
If you convert 3 newtons into kilograms which measure mass you have 0.30591486389338 kg.
Weight is already Newton
To convert pounds to newtons, you can use the conversion factor of 1 pound equal to 4.448 newtons. Therefore, 180 pounds is equal to 802.56 newtons (180 pounds * 4.448 newtons/pound).
Easy. There are about 3.6 ounces in one Newton. So, Newtons x 3.6 = ounces