Convert Gram to Grain (g → gr)

Converting grams to grains is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in grams

   Start with the number of grams (g) you want to convert.
2. 2
   Multiply by 15.432358

   The conversion factor from g to gr is 15.432358. Multiply your value by this number.
3. 3
   Read the result in grains

   The result is your value in grains (gr).

Multiply the value in grams by 15.432358. For the reverse direction, multiply by 0.064799.

• ✓1 kitchen tablespoon of water weighs about 15 g, but 1 tablespoon of flour is only 8 g — density varies.
• ✓A kitchen scale reads to 1 g; a jewellery scale to 0.01 g.
• ✓Gold is priced by gram in Europe and per troy ounce in international markets.

• ✗Assuming a tablespoon of any ingredient equals 15 g — true only for water.
• ✗Confusing g (gram) with mg (milligram) on medication labels.
• ✗Using 28 g instead of 28.35 g when converting an ounce in precision baking.

What is the Gram?

The gram equals one thousandth of a kilogram (0.001 kg) and is the everyday metric unit for cooking ingredients, postage, jewelry, pharmaceuticals, and small product weights. Originally defined in 1795 as 'the absolute weight of a volume of pure water equal to a cube of one hundredth of a meter at the temperature of melting ice,' the gram is now formally defined via the kilogram. It relates simply to the milligram (1,000 mg = 1 g) and the kilogram (1,000 g = 1 kg). European nutrition labels universally use grams for ingredient quantities, and recipes worldwide outside North America measure ingredients by mass in grams rather than by volume. Gold and silver are traded in grams for small quantities, while gemstones use carats (0.2 g = 1 carat). A standard paper clip weighs about 1 g.

• European cooking and baking recipes
• Over-the-counter medication dosages
• Gold, silver and gemstone retail (per gram pricing)

What is the Grain?

The grain equals exactly 64.79891 milligrams (0.06479891 g) and is the smallest unit in the traditional avoirdupois weight system. Originally based on the average mass of a single grain of wheat or barley, the unit was standardized to its current value with the 1959 international yard and pound agreement. The grain is still used in pharmaceutical compounding (some older drug formulations specify grains, especially aspirin and codeine), arrow tips and ammunition (bullet weights are commonly given in grains — a 9 mm bullet is around 115 grains), and precious-metal weighing (one troy ounce = 480 grains). It relates to the ounce (437.5 grains = 1 oz avoirdupois), the pound (7,000 grains = 1 lb), and the milligram (1 grain ≈ 64.8 mg). The unit reflects medieval agriculture's role in shaping early measurement systems.

• Bullet and gunpowder mass in ballistics
• Older pharmaceutical dosing in Anglo-Saxon countries
• Arrow shaft and archery equipment weights