/convert/grains-to-grams/ Convert grains (gr) to grams instantly. Includes a reference table and formula. article grains (gr) to grams Converter — 247QuickTools ,{ "@context": "https://schema.org", "@type": "SpeakableSpecification", "cssSelector": [".tool-intro", ".info-gain-section"] }
⚖️ Weight & Mass

grains (gr) to grams Converter

Convert grains (gr) to grams instantly. Includes a reference table and formula.

Quick answer: To convert grains (gr) to grams, multiply by 0.0647989. For example, 1 grains (gr) = 0.0647989 grams. Use the calculator below for any value.
grains (gr) to grams
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Common conversions
grains (gr) grams
Formula:

How to convert grains (gr) to grams

1

Enter your value

Type the number of grains (gr) you want to convert into the left box. The result in grams appears instantly in the right box. You can also type into the right box to convert in the other direction.

2

Use the swap button

Click the ⇄ Swap button to reverse the conversion — grams to grains (gr). Your current value carries across so you don't have to re-enter anything.

3

About grains (gr) and grams

grains (gr) and grams are measurement units. Use this converter to switch between them instantly.

💡 Did you know?

1 grain = 64.7989 mg. The grain was the smallest traditional weight unit in English-speaking countries — literally the weight of a single grain of barley wheat. Still used for archery arrows, gunpowder, and some pharmaceutical contexts.

📊 Common conversions at a glance
grains (gr) grams
1 0.0648
5 0.324
10 0.648
50 3.24
100 6.48
300 19.44
Reviewed for 2026. grains (gr) ↔ grams conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.