---
title: "Tonnes to Carats — t to ct converter"
description: "1 tonne = 5,000,000 carats. Convert tonnes to carats with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/tonnes-to-carats/
site: "At One Place"
---

# Tonnes to carats

**1 tonne in carats: 1 t = 5,000,000 ct**

ct = t × 5,000,000

To convert tonnes to carats, multiply by 5,000,000. The table below gives the values people look up most often, and the converter works for any number.

## Tonnes to carats table

*Common tonne values converted to carats.*

| Tonnes | Carats |
| --- | --- |
| 1 t | 5,000,000 |
| 2 t | 10,000,000 |
| 3 t | 15,000,000 |
| 4 t | 20,000,000 |
| 5 t | 25,000,000 |
| 10 t | 50,000,000 |
| 15 t | 75,000,000 |
| 20 t | 100,000,000 |
| 25 t | 125,000,000 |
| 30 t | 150,000,000 |
| 40 t | 200,000,000 |
| 50 t | 250,000,000 |
| 75 t | 375,000,000 |
| 100 t | 500,000,000 |
| 250 t | 1,250,000,000 |
| 500 t | 2,500,000,000 |
| 1,000 t | 5,000,000,000 |

## How the conversion works

The relationship is ct = t × 5,000,000. Both units measure mass, so the conversion is a fixed factor that never changes.

> Tonne: Also called a metric ton.

## Common questions

### How many carats are in one tonne?

One tonne equals 5,000,000 carats. ct = t × 5,000,000.

### How do you convert tonnes to carats?

Use ct = t × 5,000,000. So 10 t is 50,000,000 ct.

### How many tonnes are in one carat?

One carat equals 2 × 10^-7 tonnes, which is the reverse of the conversion above.

### Is there more than one kind of tonne?

Also called a metric ton.

## Related pages

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