---
title: "Carats to Grams — ct to g converter"
description: "1 carat = 0.2 grams. Convert carats to grams with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/carats-to-grams/
site: "At One Place"
---

# Carats to grams

**1 carat in grams: 1 ct = 0.2 g**

g = ct × 1/5

To convert carats to grams, multiply by 0.2. The table below gives the values people look up most often, and the converter works for any number.

## Carats to grams table

*Common carat values converted to grams.*

| Carats | Grams |
| --- | --- |
| 1 ct | 0.2 |
| 2 ct | 0.4 |
| 3 ct | 0.6 |
| 4 ct | 0.8 |
| 5 ct | 1 |
| 10 ct | 2 |
| 15 ct | 3 |
| 20 ct | 4 |
| 25 ct | 5 |
| 30 ct | 6 |
| 40 ct | 8 |
| 50 ct | 10 |
| 75 ct | 15 |
| 100 ct | 20 |
| 250 ct | 50 |
| 500 ct | 100 |
| 1,000 ct | 200 |

## How the conversion works

The relationship is g = ct × 1/5. Both units measure mass, so the conversion is a fixed factor that never changes.

## Common questions

### How many grams are in one carat?

One carat equals 0.2 grams. g = ct × 1/5.

### How do you convert carats to grams?

Use g = ct × 1/5. So 10 ct is 2 g.

### How many carats are in one gram?

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

## Related pages

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