Ounce to Grain Converter 2025 - oz to gr Calculator | Thiyagi

Ounce to Grain Converter

Convert between ounces (oz) and grains (gr) for precious metals, jewelry, ammunition, and traditional weight measurements

Standard weight unit
Traditional small weight unit
Enter a value to see the conversion result

Weight Reference

Ounces ⇔ Grains
0.1 oz ⇔ 43.75 gr
0.25 oz ⇔ 109.375 gr
0.5 oz ⇔ 218.75 gr
1 oz ⇔ 437.5 gr
2 oz ⇔ 875 gr
5 oz ⇔ 2,187.5 gr

Traditional Applications

Precious Metals:
• Gold coins: 0.5-1 oz (218-437 gr)
• Silver jewelry: 0.1-2 oz (44-875 gr)
• Platinum items: 0.25-1 oz
• Investment coins: 1 oz (437.5 gr)
Ammunition & Archery:
• Bullet weights: 50-500 gr (0.11-1.14 oz)
• Arrow points: 100-200 gr
• Powder charges: 10-100 gr
• Projectile mass: 25-750 gr
Jewelry & Gems:
• Pearl weights: 1-50 gr (0.002-0.11 oz)
• Small gems: 5-100 gr
• Watch components: 1-20 gr
• Precious stone settings: 10-200 gr

Weight Units

  • oz: Avoirdupois ounce
  • gr: Grain (1/7000 pound)
  • Conversion: 1 oz = 437.5 gr
  • History: Based on barley grain

Usage Tips

  • oz for larger weights
  • gr for precise small weights
  • Common in precious metals
  • Used in ammunition specs

Applications

  • Jewelry: Precious metals
  • Ammunition: Bullet weights
  • Trading: Commodity pricing
  • Crafts: Small measurements