Grams to Grains Converter
Type a value in grams or grains and get the instant conversion both ways.
Grams to Grains
Result in Grains
—
gr
Grains to Grams (Reverse)
Result in Grams
—
g
Quick Reference — Common Gram to Grain Conversions
| Grams (g) | Grains (gr) | Common context |
|---|---|---|
| 0.0648 | 1 | 1 grain exactly |
| 1 | 15.432 | Lightweight bullet |
| 3 | 46.297 | Small pistol primer charge |
| 5 | 77.162 | Typical .223 bullet weight |
| 10 | 154.324 | Heavier pistol bullet |
| 15 | 231.486 | Standard arrow shaft range |
| 28.35 | 437.5 | 1 avoirdupois ounce |
| 100 | 1543.24 | Small lab sample |
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Summary
Type a value in grams or grains and get the instant conversion both ways.
How it works
- Enter a value in the Grams field to see the equivalent grains immediately.
- Alternatively, enter a value in the Grains field for reverse (gr to g) conversion.
- Both results update in real time as you type.
- Click the Copy button beneath either result to copy the value to your clipboard.
- Use the Reset button to clear both fields and start a fresh conversion.
- Check the reference table below for common gram-to-grain values.
Use cases
- Convert bullet or propellant weights from grams to grains for ballistics data sheets.
- Check pharmaceutical dosage labels that specify drug quantities in grains.
- Convert precious metal sample weights from grams to grains for gemology or assaying.
- Verify reloading data when switching between metric and traditional grain-based references.
- Help students confirm unit-conversion homework answers in chemistry or physics.
- Compare product specifications listed in different mass units while shopping or sourcing.
- Convert nutritional supplement amounts listed in grains to grams for metric scales.
- Cross-check archery arrow shaft weights between grain and gram specifications.
Frequently Asked Questions
Last updated: 2026-06-11 ·
Reviewed by Nham Vu