How many grains are in one kilogram?

Exactly 15432.3584 grains equal one kilogram. This is a fixed, internationally defined value derived from the troy grain standard.

Is the grain used in everyday life today?

The grain is still actively used in ballistics (bullet and propellant weights), pharmacy (some drug specifications), and precious-metal trading. Outside these fields it has been largely replaced by metric units.

What is the difference between a troy grain and an avoirdupois grain?

There is no difference — a grain is the same unit (64.79891 mg) in both the troy and avoirdupois systems. Only the larger units (ounce, pound) differ between those systems.

How do I convert grains back to kilograms?

Divide the number of grains by 15432.3584, or use the Reverse toggle on this page.

Is this converter accurate enough for reloading?

Yes. The conversion factor used (15432.3584 gr/kg) matches the NIST definition. Results are displayed to 4 decimal places, which exceeds the resolution of most powder scales.

Kilograms to Grains Converter

Enter a mass in kilograms and instantly get the equivalent value in grains.

Mass Input

Kilograms (kg)

Result

Enter a value and press Convert

Quick Reference — kg to Grains

Kilograms (kg)	Grains (gr)

Summary

The kilogram-to-grain converter instantly translates any mass in kilograms into the equivalent number of grains using the exact factor 1 kg = 15432.3584 gr. The grain (gr) is one of the oldest units of mass, still widely used in ballistics for bullet and propellant weights, in pharmacy for drug dosages, and in precious-metals trading. Reverse conversion (grains to kilograms) is also provided on the same page.

How it works

Enter a mass value in the kilograms field.
The converter applies the factor 1 kg = 15432.3584 gr in real time.
The equivalent value in grains appears instantly below the input.
Use the Reverse toggle to convert grains back to kilograms.
Click Copy to copy the result to your clipboard.

Use cases

Look up bullet or powder weights in grains for reloading ammunition.
Convert pharmaceutical doses between metric and apothecary units.
Check precious-metal weights (gold, silver) in grains for trading.
Verify mass values when reading historical or scientific documents.
Cross-check postal scale readings in mixed unit systems.
Convert laboratory sample masses for legacy protocols.

Frequently Asked Questions

Last updated: 2026-05-29 · Reviewed by Nham Vu