Home › Unit Conversion › Grains to Grams
Grains to Grams (grain to g)
Convert grains to grams: 1 grain = 0.0647989 g. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 grain = 0.0647989 g
grams = grains × 0.06479891 — reverse: grains = grams × 15.43235835
The factor is derived from the SI definitions of both units (base unit: kg) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 grain = 0.323995 g
- 12.5 grain = 0.809986 g
- 100 grain = 6.47989 g
Grains to grams conversion table
| Grains (grain) | Grams (g) |
|---|---|
| 1 | 0.0647989 |
| 2 | 0.129598 |
| 3 | 0.194397 |
| 4 | 0.259196 |
| 5 | 0.323995 |
| 6 | 0.388793 |
| 7 | 0.453592 |
| 8 | 0.518391 |
| 9 | 0.58319 |
| 10 | 0.647989 |
| 15 | 0.971984 |
| 20 | 1.29598 |
| 25 | 1.61997 |
| 30 | 1.94397 |
| 40 | 2.59196 |
| 50 | 3.23995 |
| 75 | 4.85992 |
| 100 | 6.47989 |
| 200 | 12.9598 |
| 250 | 16.1997 |
| 500 | 32.3995 |
| 1000 | 64.7989 |
FAQ
How many grams are in one grain?
1 grain = 0.0647989 g. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert grains to grams?
Multiply the value in grains by 0.06479891: grams = grains × 0.06479891. For example, 5 grain = 0.323995 g.
How do I convert grams back to grains?
Multiply by the inverse factor 15.43235835 (grains = grams × 15.43235835), or use the grams-to-grains page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=grain&to_unit=g - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"grain","to_unit":"g"} - Markdown: https://tttkmbb.com/conversion/grains-to-grams.md · JSON: https://tttkmbb.com/conversion/grains-to-grams.json (add
?value=for a result) · Units: /api/v1/units?quantity=mass - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.