Grain to Gram Conversion - Accurate gr ⇄ g Converter Tool

Convert between grains (gr) and grams (g) with precision using standard weight measurements

Grains to Grams Converter Tool
Enter a value to convert between grains and grams with bidirectional conversion (1 grain = 0.0647989 grams)
Note: This converter uses standard conversion (1 grain = 0.0647989 grams). Perfect for ammunition weights, precious metals, pharmaceutical measurements, and small weight conversions.

Looking for an accurate way to perform grain to gram conversion? Our gr ⇄ g converter provides precise results instantly. Whether you are working in medicine, jewelry, or ammunition reloading, converting grains to grams or gram to grain helps you measure small weights with high accuracy.

Why Users Love This Grain ⇄ Gram Conversion

  • Accurate formula: Uses the official relationship between grains and grams.
  • Instant calculation: Results appear immediately.
  • Two-way function: Works for both grains to grams and grams to grains.
  • Clear results: Shows exact and rounded answers.
  • Practical use: Mobile and desktop friendly.

How to Use the Converter

  1. Enter the value in grains or grams.
  2. Select conversion direction.
  3. View instant results.
  4. Copy, save, or share the calculation.

What is a Grain (gr)?

grain is one of the smallest traditional units of mass. It originated in the apothecaries’ system and was historically based on the weight of a single grain of barley.

Key Facts About Grains

  • Exact value: 1 grain = 0.06479891 grams.
  • Relationship: 7000 grains = 1 avoirdupois pound.
  • Abbreviation: gr.
  • Usage: Ammunition (bullet weights), precious metals, and some medical dosages.

What is a Gram (g)?

gram is a unit of mass in the metric system and is widely used worldwide in science, trade, and everyday life.

Key Facts About Grams

  • Exact value: 1 gram = 15.432 grains.
  • Relationship: 1000 grams = 1 kilogram.
  • Abbreviation: g.
  • Usage: Food packaging, medicine, laboratory science, and jewelry.

Grain to Gram Conversion Formula

Formula:

Grams = Grains × 0.06479891

Grain to Gram Conversion Example

  • 10 grains to grams
    Step 1: Formula = g = gr × 0.06479891
    Step 2: Substitute = 10 × 0.06479891
    Step 3: Result = 0.648 g
     
  • 50 grains to grams
    Step 1: g = gr × 0.06479891
    Step 2: Substitute = 50 × 0.06479891
    Step 3: Result = 3.24 g
     
  • 100 grains to grams
    Step 1: g = gr × 0.06479891
    Step 2: Substitute = 100 × 0.06479891
    Step 3: Result = 6.48 g

Gram to Grain Conversion Formula

Formula:

Grains = Grams × 15.43236

Gram to Grain Conversion Example

  • 1 gram to grains
    Step 1: Formula = gr = g × 15.43236
    Step 2: Substitute = 1 × 15.43236
    Step 3: Result = 15.43 grains
     
  • 5 grams to grains
    Step 1: gr = g × 15.43236
    Step 2: Substitute = 5 × 15.43236
    Step 3: Result = 77.16 grains
     
  • 10 grams to grains
    Step 1: gr = g × 15.43236
    Step 2: Substitute = 10 × 15.43236
    Step 3: Result = 154.32 grains

Applications of Grain and Gram Conversion

  • Ammunition Reloading: Bullet and gunpowder weights are often measured in grains.
  • Medicine: Older prescriptions use grains; modern medicine uses grams or milligrams.
  • Jewelry: Precious stones and metals sometimes use grains for precise weight.
  • Science: Laboratory measurements may require converting between grains and grams.
  • Everyday Use: Historical documents or recipes might reference grains instead of grams.

Quick Reference Table for Grain ⇄ Gram

Grains (gr)

Grams (g)

Grams (g)

Grains (gr)

10 gr

0.648 g

1 g

15.43 gr

50 gr

3.24 g

5 g

77.16 gr

100 gr

6.48 g

10 g

154.32 gr

500 gr

32.4 g

20 g

308.64 gr

Use our grain ⇄ gram converter at Digital Calculator for fast, accurate, and reliable results. Perfect for reloading, medicine, jewelry, and laboratory science.

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Published: 9/25/2025