---
title: "1 g to mg = 1,000 mg"
description: "1 gram is 1,000 milligrams. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/1-grams-to-mg/
site: "At One Place"
---

# 1 g to mg

**1 gram in milligrams: 1 g = 1,000 mg**

mg = g × 1,000

1 gram is 1,000 milligrams. To get there, multiply by 1,000.

## Values either side

*Grams near 1, converted to milligrams.*

| Grams | Milligrams |
| --- | --- |
| 0.5 g | 500 |
| 1 g ← | 1,000 |
| 1.5 g | 1,500 |
| 2 g | 2,000 |
| 2.5 g | 2,500 |
| 3 g | 3,000 |

## How the conversion works

The relationship is mg = g × 1,000. Both units measure mass, so the conversion is a fixed factor that never changes.

## Common questions

### What is 1 g in milligrams?

1 g is 1,000 mg.

### How do you convert grams to milligrams?

Multiply by 1,000.

## Related pages

- [Grams to milligrams](https://atoneplace.net/convert/grams-to-mg/)
- [1 mg to g](https://atoneplace.net/convert/1-mg-to-grams/)
- [0.5 g to mg](https://atoneplace.net/convert/0-5-grams-to-mg/)
- [1.5 g to mg](https://atoneplace.net/convert/1-5-grams-to-mg/)
- [2 g to mg](https://atoneplace.net/convert/2-grams-to-mg/)
- [2.5 g to mg](https://atoneplace.net/convert/2-5-grams-to-mg/)
- [3 g to mg](https://atoneplace.net/convert/3-grams-to-mg/)

## 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/)