Grains to Grams Converter

Summary

This tool converts a weight expressed in grains (gr) to grams (g) using the exact factor 1 grain = 0.06479891 grams. The grain is a traditional unit of mass used in ballistics, pharmacy, and gemology. Simply enter a value in grains and the equivalent in grams is shown immediately.

How it works

1. Type a weight value in the Grains input field.
2. The converter multiplies your value by 0.06479891 (the exact SI-defined factor).
3. The result in grams appears instantly below the input.
4. Use the Swap button to reverse the conversion (grams to grains).
5. Click Copy to copy the result to your clipboard.

Use cases

• Convert bullet or powder charge weights from grains to grams for reloading.
• Convert gem or pearl weights from grains to metric grams.
• Verify pharmacy or apothecary grain measurements in metric units.
• Cross-check precious metal weights between imperial and metric systems.
• Convert archery arrow weight specs from grains to grams.
• Understand nutritional or supplement dosage conversions.

Frequently Asked Questions