Carats to Tonnes Converter (ct to t)

How to convert carats to metric tons

Formulat = ct × 2×10⁻⁷

Multiply the value in carats by 2×10⁻⁷. To go the other way, multiply by 5,000,000 (or divide by 2×10⁻⁷).

A carat is smaller than a metric ton: it takes 5,000,000 carats to make one metric ton.

Worked examples

1 carat1 ct × 2×10⁻⁷ = 2×10⁻⁷ t
5 carats5 ct × 2×10⁻⁷ = 0.000001 t
10 carats10 ct × 2×10⁻⁷ = 0.000002 t
20 carats20 ct × 2×10⁻⁷ = 0.000004 t
100 carats100 ct × 2×10⁻⁷ = 0.00002 t

Carats to metric tons conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Carats to metric tons: 0.1–10 ct
Carats (ct)	Metric tons (t)
0.1 ct	2×10⁻⁸ t
0.25 ct	5×10⁻⁸ t
0.5 ct	1×10⁻⁷ t
1 ct	2×10⁻⁷ t
2 ct	4×10⁻⁷ t
3 ct	6×10⁻⁷ t
4 ct	8×10⁻⁷ t
5 ct	0.000001 t
6 ct	0.0000012 t
7 ct	0.0000014 t
8 ct	0.0000016 t
9 ct	0.0000018 t
10 ct	0.000002 t

Carats to metric tons: 12–1,000 ct
Carats (ct)	Metric tons (t)
12 ct	0.0000024 t
15 ct	0.000003 t
20 ct	0.000004 t
25 ct	0.000005 t
30 ct	0.000006 t
40 ct	0.000008 t
50 ct	0.00001 t
75 ct	0.000015 t
100 ct	0.00002 t
250 ct	0.00005 t
500 ct	0.0001 t
1,000 ct	0.0002 t

About the units

Carat (ct)

The metric carat is exactly 200 mg and is used to weigh gemstones. (Karat, a gold-purity scale, is a different thing.) One carat equals 0.0002 kilograms (kg).

Metric ton (t)

Exactly 1,000 kg. Used worldwide for vehicles, cargo and commodities; about 10% more than a US short ton.

Frequently asked questions

How many metric tons are in one carat?

There are 2×10⁻⁷ metric tons in one carat, and this value is exact by definition.

How do I convert carats to metric tons?

Multiply the number of carats by 2×10⁻⁷. For example, 10 ct × 2×10⁻⁷ = 0.000002 t.

How many carats are in one metric ton?

One metric ton equals 5,000,000 carats. That is the reverse factor, 1 ÷ 2×10⁻⁷.

What is 10 carats in metric tons?

10 ct = 0.000002 t.

Is this ct to t converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Carats to Tonnes Converter