Grain to Gram Converter
Weight · unit-converter
Convert Grain to Gram with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use gram-based factors (international avoirdupois pound and metric definitions). The full Weight Converter also includes carat, grain, and US/UK hundredweight.
Calculator
From: Grain (gr)
To: Gram (g)
About Grain
The grain is 1/7000 of a pound (exactly 64.79891 mg). It is used in ballistics, pharmacy, and precious-metal contexts.
About Gram
The gram is one thousandth of a kilogram. Recipes, lab work, and small masses typically use grams.
How to convert grains to grams
1 grain is equal to 0.06479891 gram:
1 gr = (0.06479891 g ÷ 1 g) g = 0.06479891 g
Each grain is defined as 0.06479891 g and each gram as 1 g, so one gr equals 0.06479891 ÷ 1 g = 0.06479891 g.
Let w(gr) be the numeric value of the same mass measured in Grain (gr), and w(g) the value in Gram (g). Then:
w(g) = w(gr) × (0.06479891 / 1)
Equivalently, divide by how many gr fit into one g (grams per g divided by grams per gr):
w(g) = w(gr) ÷ 15.43235835294143
Or: gram = grain ÷ 15.43235835294143
Examples
Example #1: Convert 20 gr to gram
20 gr = 20 gr × (0.06479891/1) g = 1.2959782 g
20 gr = 20 gr ÷ 15.43235835294143 = 1.2959782 g
Example #2: Convert 50 gr to gram
50 gr = 50 gr × (0.06479891/1) g = 3.2399455 g
50 gr = 50 gr ÷ 15.43235835294143 = 3.2399455 g
Summary
To convert Grain to Gram, multiply the value in gr by the ratio of grams per gr divided by grams per g. Equivalently: value_g = value_gr × (0.06479891 / 1). Numerically, 1 gr equals 0.06479891 g.
Relationship context
You are converting between imperial / UK (stone, long ton, pound, ounce) (Grains) and metric (SI) (Grams). Metric mass is decimal from the gram; US and imperial masses use pounds and ounces with fixed definitions relative to the kilogram. The numeric factor used here is 6.479891e-2.
Conversion tables
| Grain (gr) | Gram (g) |
|---|---|
| 0.1 | 0.006479891 |
| 1 | 0.06479891 |
| 2 | 0.12959782 |
| 3 | 0.19439673 |
| 4 | 0.25919564 |
| 5 | 0.32399455 |
| 6 | 0.38879346 |
| 7 | 0.45359237 |
| 8 | 0.51839128 |
| 9 | 0.58319019 |
| Grain (gr) | Gram (g) |
|---|---|
| 10 | 0.6479891 |
| 20 | 1.2959782 |
| 30 | 1.9439673 |
| 40 | 2.5919564 |
| 50 | 3.2399455 |
| 60 | 3.8879346 |
| 70 | 4.5359237 |
| 80 | 5.1839128 |
| 90 | 5.8319019 |
| 100 | 6.479891 |