Grain to Gram Converter
Convert Grain (gr) to Gram (g) instantly. 1 gr = 0.064799 g.
Mass Converter
26 units available
1 gr = 0.064799 g
Formula:
g = gr × 0.06479891With your value: 1 gr = 0.06479891 g
How big is that?
Everyday references on a logarithmic scale, all expressed in grain so you can sanity-check the result.
Other Grain to Gram conversions
Grain to Gram Conversion Table
| Grain (gr) | Gram (g) |
|---|---|
| 0.5 | 0.032399 |
| 1 | 0.064799 |
| 2 | 0.129598 |
| 5 | 0.323995 |
| 10 | 0.647989 |
| 15 | 0.971984 |
| 20 | 1.295978 |
| 25 | 1.619973 |
| 50 | 3.239945 |
| 100 | 6.479891 |
| 250 | 16.199728 |
| 500 | 32.399455 |
| 1000 | 64.79891 |
Gram to Grain Conversion Table
| Gram (g) | Grain (gr) |
|---|---|
| 0.5 | 7.716179 |
| 1 | 15.432358 |
| 2 | 30.864717 |
| 5 | 77.161792 |
| 10 | 154.323584 |
| 15 | 231.485375 |
| 20 | 308.647167 |
| 25 | 385.808959 |
| 50 | 771.617918 |
| 100 | 1,543.235835 |
| 250 | 3,858.089588 |
| 500 | 7,716.179176 |
| 1000 | 15,432.358353 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Grain (gr)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Gram (g)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Grain to Gram
To convert from Grain (gr) to Gram (g), multiply the value by 0.06479891.
Formula: g = gr × 0.06479891
Reverse: gr = g × 15.4323583529
Step-by-Step Example
- Start with your value in Grain. For example: 5 gr
- Multiply by the conversion factor: 5 x 0.06479891
- The result is: 0.323995 g
About Grain
The grain equals exactly 64.79891 milligrams and was originally the weight of a single barleycorn. It is still the standard unit for bullets, propellant and arrows.
Common uses: ammunition, archery, pharmacy (historic).
About Gram
The gram equals one thousandth of a kilogram. It is commonly used for measuring food, ingredients, and small items.
Common uses: cooking, nutrition labels, jewelry.
Frequently Asked Questions
How many Gram are in 1 Grain?
There are exactly 0.06479891 Gram in 1 Grain. This means the conversion factor from Grain to Gram is 0.06479891.
What is the formula to convert Grain to Gram?
The formula to convert Grain to Gram is: g = gr × 0.06479891. For example, to convert 10 Grain to Gram, you would multiply 10 by 0.06479891.
What is a Grain?
The grain equals exactly 64.79891 milligrams and was originally the weight of a single barleycorn. It is still the standard unit for bullets, propellant and arrows.
What is a Gram?
The gram equals one thousandth of a kilogram. It is commonly used for measuring food, ingredients, and small items.
What are the common uses of Grain?
The Grain is commonly used in ammunition, archery, pharmacy (historic).
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Grain to Gram converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/grain-to-gram