Kilograms to tonnes

1 kilogram = 0.001 tonnes

Type a value in kilograms (kg) to get tonnes (t) straight away. A kilogram is smaller than a tonne, so the number goes down. Both units belong to weight, measured here against the kilogram.

FromTo0.001

1 kg = 0.001 t

Formula

t = kg × 0.001

One kilogram is 0.001 tonnes, so multiply by that factor. You can also divide by 1,000, the number of kilograms in one tonne. Here kg is the value in kilograms and t is the result in tonnes.

Worked example: 70 kilograms × 0.001 = 0.07 tonnes.

Kilograms to tonnes table

kilograms (kg)	tonnes (t)
1 kg	0.001 t
2 kg	0.002 t
3 kg	0.003 t
4 kg	0.004 t
5 kg	0.005 t
6 kg	0.006 t
7 kg	0.007 t
8 kg	0.008 t
9 kg	0.009 t
10 kg	0.01 t
15 kg	0.015 t
20 kg	0.02 t
25 kg	0.025 t
30 kg	0.03 t
40 kg	0.04 t
50 kg	0.05 t
60 kg	0.06 t
75 kg	0.075 t
100 kg	0.1 t

Everyday kilograms in tonnes

What it is	kg	t
a bag of sugar	1 kg	0.001 t
a bag of atta	5 kg	0.005 t
a common checked-bag limit	23 kg	0.023 t
an adult body weight	70 kg	0.07 t
a heavy adult	100 kg	0.1 t

Quick estimate in your head

Divide by 10^3: move the decimal point 3 places left.

Watch out for

A metric tonne is 1,000 kg. A US short ton is 907 kg and a UK long ton is 1,016 kg.

About the units

Kilogram (kg). The SI base unit of mass, defined through the Planck constant since 2019.

Tonne (t). The metric ton: 1,000 kg. Used for freight, cars and crops.

Going the other way, 1 tonne is 1,000 kilograms.

Questions

How many tonnes are in 1 kilogram?

1 kilogram is 0.001 tonnes, and 1 tonne is 1,000 kilograms.

How do I convert kilograms to tonnes?

Use t = kg × 0.001. For example, 70 kilograms × 0.001 = 0.07 tonnes.

Is the kilogram to tonne factor exact?

Yes, the definitions are exact, so the factor is exact. Results here are rounded to 6 significant digits for display.

How much is a heavy adult in tonnes?

100 kg is 0.1 t.

Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).

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