Convert from grams to newtons manually. Multiply the number of grams you want to convert by "0.00980665." The resulting value is the number of newtons.
Use an automated conversion calculator to convert from grams to newtons. Visit the Convert Units website. Enter the number of grams you want to convert into the text field captioned "gram." Click the "Convert!" button to view the result.
Go to UnitConversion.org. Type the number of grams in the text field captioned "gram-force[gf]." The converted value in newtons will automatically appear in the text field captioned "newton[N]."