Need a quick and easy way to visually discover the difference between ounces and grams? Ounces to Grams Converter is the way to go! Simply watch conversions appear before your eyes as you slide up and down the measurement scale! Its that easy. You will soon discover general relations between ounces and grams visually. Ounces to Grams Converter is a great tool for both teacher and student alike! One thousand grams equals one kilogram. The word gram comes from the Latin word gramma which means a small weight. The ounce (avoirdupois ounce) (oz) is the most commonly used ounce. Sixteen ounces equal one pound. One ounce equals 437.5 grains.