---
title: "Carats to Kilograms — ct to kg converter"
description: "1 carat = 0.0002 kilograms. Convert carats to kilograms with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/carats-to-kg/
site: "At One Place"
---

# Carats to kilograms

**1 carat in kilograms: 1 ct = 0.0002 kg**

kg = ct × 0.0002

To convert carats to kilograms, multiply by 0.0002. The table below gives the values people look up most often, and the converter works for any number.

## Carats to kilograms table

*Common carat values converted to kilograms.*

| Carats | Kilograms |
| --- | --- |
| 1 ct | 0.0002 |
| 2 ct | 0.0004 |
| 3 ct | 0.0006 |
| 4 ct | 0.0008 |
| 5 ct | 0.001 |
| 10 ct | 0.002 |
| 15 ct | 0.003 |
| 20 ct | 0.004 |
| 25 ct | 0.005 |
| 30 ct | 0.006 |
| 40 ct | 0.008 |
| 50 ct | 0.01 |
| 75 ct | 0.015 |
| 100 ct | 0.02 |
| 250 ct | 0.05 |
| 500 ct | 0.1 |
| 1,000 ct | 0.2 |

## How the conversion works

The relationship is kg = ct × 0.0002. Both units measure mass, so the conversion is a fixed factor that never changes.

## Common questions

### How many kilograms are in one carat?

One carat equals 0.0002 kilograms. kg = ct × 0.0002.

### How do you convert carats to kilograms?

Use kg = ct × 0.0002. So 10 ct is 0.002 kg.

### How many carats are in one kilogram?

One kilogram equals 5,000 carats, which is the reverse of the conversion above.

## Related pages

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