---
title: "Milligrams to Grains — mg to gr converter"
description: "1 milligram = 0.015432 grains. Convert milligrams to grains with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/mg-to-grains/
site: "At One Place"
---

# Milligrams to grains

**1 milligram in grains: 1 mg = 0.015432 gr**

gr = mg × 0.01543235835

To convert milligrams to grains, multiply by 0.01543235835. The table below gives the values people look up most often, and the converter works for any number.

## Milligrams to grains table

*Common milligram values converted to grains.*

| Milligrams | Grains |
| --- | --- |
| 1 mg | 0.015432 |
| 2 mg | 0.030865 |
| 3 mg | 0.046297 |
| 4 mg | 0.061729 |
| 5 mg | 0.077162 |
| 10 mg | 0.15432 |
| 15 mg | 0.23149 |
| 20 mg | 0.30865 |
| 25 mg | 0.38581 |
| 30 mg | 0.46297 |
| 40 mg | 0.61729 |
| 50 mg | 0.77162 |
| 75 mg | 1.157427 |
| 100 mg | 1.543236 |
| 250 mg | 3.85809 |
| 500 mg | 7.716179 |
| 1,000 mg | 15.43236 |

## How the conversion works

The relationship is gr = mg × 0.01543235835. Both units measure mass, so the conversion is a fixed factor that never changes.

## Common questions

### How many grains are in one milligram?

One milligram equals 0.015432 grains. gr = mg × 0.01543235835.

### How do you convert milligrams to grains?

Use gr = mg × 0.01543235835. So 10 mg is 0.15432 gr.

### How many milligrams are in one grain?

One grain equals 64.79891 milligrams, which is the reverse of the conversion above.

## Related pages

- [Grains to Milligrams](https://atoneplace.net/convert/grains-to-mg/)
- [Milligrams to Kilograms](https://atoneplace.net/convert/mg-to-kg/)
- [Milligrams to Grams](https://atoneplace.net/convert/mg-to-grams/)
- [Milligrams to Tonnes](https://atoneplace.net/convert/mg-to-tonnes/)
- [Milligrams to Pounds](https://atoneplace.net/convert/mg-to-lbs/)
- [Milligrams to Ounces](https://atoneplace.net/convert/mg-to-oz/)
- [Milligrams to Stone](https://atoneplace.net/convert/mg-to-stone/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)