---
title: "Milligrams to Grams — mg to g converter"
description: "1 milligram = 0.001 grams. Convert milligrams to grams with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/mg-to-grams/
site: "At One Place"
---

# Milligrams to grams

**1 milligram in grams: 1 mg = 0.001 g**

g = mg × 0.001

To convert milligrams to grams, multiply by 0.001. The table below gives the values people look up most often, and the converter works for any number.

## Milligrams to grams table

*Common milligram values converted to grams.*

| Milligrams | Grams |
| --- | --- |
| 1 mg | 0.001 |
| 2 mg | 0.002 |
| 3 mg | 0.003 |
| 4 mg | 0.004 |
| 5 mg | 0.005 |
| 10 mg | 0.01 |
| 15 mg | 0.015 |
| 20 mg | 0.02 |
| 25 mg | 0.025 |
| 30 mg | 0.03 |
| 40 mg | 0.04 |
| 50 mg | 0.05 |
| 75 mg | 0.075 |
| 100 mg | 0.1 |
| 250 mg | 0.25 |
| 500 mg | 0.5 |
| 1,000 mg | 1 |

## How the conversion works

The relationship is g = mg × 0.001. Both units measure mass, so the conversion is a fixed factor that never changes.

## Common questions

### How many grams are in one milligram?

One milligram equals 0.001 grams. g = mg × 0.001.

### How do you convert milligrams to grams?

Use g = mg × 0.001. So 10 mg is 0.01 g.

### How many milligrams are in one gram?

One gram equals 1,000 milligrams, which is the reverse of the conversion above.

## Related pages

- [Grams to Milligrams](https://atoneplace.net/convert/grams-to-mg/)
- [Milligrams to Kilograms](https://atoneplace.net/convert/mg-to-kg/)
- [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/)