1 grain = 0.06479891 grams
Convert Grains to Grams Instantly
This free online converter helps you quickly and accurately convert grains (gr) to grams (g). Commonly used in the pharmaceutical industry, chemistry labs, and reloading ammunition, grains are a unit of mass especially suited for very small measurements.
Enter the number of grains, and this tool will give you the exact value in grams. No downloads or registration needed — works on all devices.
Grains to Grams Conversion Formula
Use this formula to convert grains to grams:
grams = grains × 0.06479891
Example conversions:
1 grain = 0.06479891 grams5 grains = 0.32399 grams10 grains = 0.64799 grams
You can also reverse the formula for grams to grains:
grains = grams ÷ 0.06479891
Why Use This Grains to Grams Converter?
- 📏 Precision to five decimal places
- ⚖️ Trusted by reloaders, pharmacists, and lab technicians
- 🔁 Bidirectional: grains ⇄ grams
- 📱 Mobile and desktop friendly
- 🧪 Great for scientific and medical use
What Is a Grain?
A grain is a historic unit of weight based on the mass of a single cereal seed. Today, it's standardized as exactly 0.06479891 grams and is still used for bullets, powders, and medications.
Though small, it plays a big role in fields that demand high precision with minimal mass.
Convert Grams to Grains
Need to convert grams back to grains? Use the formula:
grains = grams ÷ 0.06479891
Example: 0.5 g = 7.716 grains
Click “Swap” in the converter to instantly reverse the direction.