---
title: "Milligrams to Kilograms — mg to kg converter"
description: "1 milligram = 0.000001 kilograms. Convert milligrams to kilograms with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/mg-to-kg/
site: "At One Place"
---

# Milligrams to kilograms

**1 milligram in kilograms: 1 mg = 0.000001 kg**

kg = mg × 0.000001

To convert milligrams to kilograms, multiply by 0.000001. The table below gives the values people look up most often, and the converter works for any number.

## Milligrams to kilograms table

*Common milligram values converted to kilograms.*

| Milligrams | Kilograms |
| --- | --- |
| 1 mg | 0.000001 |
| 2 mg | 0.000002 |
| 3 mg | 0.000003 |
| 4 mg | 0.000004 |
| 5 mg | 0.000005 |
| 10 mg | 0.00001 |
| 15 mg | 0.000015 |
| 20 mg | 0.00002 |
| 25 mg | 0.000025 |
| 30 mg | 0.00003 |
| 40 mg | 0.00004 |
| 50 mg | 0.00005 |
| 75 mg | 0.000075 |
| 100 mg | 0.0001 |
| 250 mg | 0.00025 |
| 500 mg | 0.0005 |
| 1,000 mg | 0.001 |

## How the conversion works

The relationship is kg = mg × 0.000001. Both units measure mass, so the conversion is a fixed factor that never changes.

## Common questions

### How many kilograms are in one milligram?

One milligram equals 0.000001 kilograms. kg = mg × 0.000001.

### How do you convert milligrams to kilograms?

Use kg = mg × 0.000001. So 10 mg is 0.00001 kg.

### How many milligrams are in one kilogram?

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

## Related pages

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