Grain
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/grain-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/grain-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/grain-def/)Use the native HTML custom element.
Definition
A unit of mass equal to 1/7000 of a pound (64.799 mg).
Explanation
Originally based on the weight of a single grain of barley. Still used for bullet weights and pharmaceutical measurements.
RELATED CONVERSIONS
RELATED ARTICLES
From milligrams to metric tons, this guide covers every major weight and mass unit with exact conversion factors, real-world examples, and a clear explanation of why weight and mass are not the same thing.
Volume Units Guide: Liters, Gallons, Cups, and MoreA thorough reference for every major volume unit—metric, US customary, imperial, and culinary—including exact conversion factors, US vs UK differences, and practical cooking and industrial examples.
Complete Guide to Length Units: From Nanometers to Light-YearsA comprehensive reference covering every major length unit—metric, imperial, nautical, and astronomical—with exact conversion factors and real-world scale examples.
RELATED TERMS
Imperial System
A system of measurement used primarily in the United States, based on historical English units.
Troy Weight
A system of weights used for precious metals and gemstones.
Avoirdupois
The standard system of weights based on the 16-ounce pound, used for everyday goods.
Horsepower
A unit of power. Mechanical horsepower equals approximately 745.7 watts.
BTU (British Thermal Unit)
The amount of heat needed to raise the temperature of one pound of water by one degree Fahrenheit.