# How do I convert kg to tons?

Converts kilograms to tons and back, for the US short ton, the metric ton, and the UK long ton.

- Page: https://www.acalculator.org/convert/kg-to-tons
- JSON spec: https://www.acalculator.org/convert/kg-to-tons.json
- Version: d7ca9e976a74

## Default answer

Example with the default inputs (Kilograms (kg) 1, Which ton US short ton, 2,000 lb): 1 kg = 0.001102 tons (US short ton, 2,000 lb).

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Kilograms (kg) | The amount in kilograms to convert. |
| result | Tons | The same amount in short tons. |
| ton | Which ton | The US short ton is 2,000 lb, the metric ton (tonne) is 1,000 kg, and the UK long ton is 2,240 lb. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Kilograms (kg) | The amount in kilograms to convert. |
| result | Tons | The amount in short tons. |

## Method

short tons = kg ÷ 907.18474 for US short tons; the factor depends on the ton

## Assumptions

- 1 US short ton = 2,000 lb = 907.18474 kg; 1 metric ton (tonne) = 1,000 kg; 1 UK long ton = 2,240 lb = 1,016.0469088 kg, from the exact definitions in NIST SP 811.
- In the US, "ton" means the short ton. Most other countries mean the metric ton, which is also written "tonne" or "t".
- The answer shows at most 6 decimal places; the calculation keeps full precision.

## Worked examples

1. value = 1,000, ton = metric gives result = 1. Source: NIST SP 811 (2008), Appendix B.8: Metric ton or tonne, 1,000 kg.
2. value = 907.18474, ton = short gives result = 1. Source: NIST SP 811 (2008), Appendix B.8: US short ton, 2,000 lb.
3. value = 2,000, ton = long gives result = 1.968413. Source: NIST SP 811 (2008), Appendix B.8: UK long ton, 2,240 lb.

## FAQ

### How many tons is 1,000 kg?

1,000 kg is exactly 1 metric ton, 1.102311 US short tons, or 0.984207 UK long tons.

### How do I convert kg to tons?

short tons = kg ÷ 907.18474 for US short tons; the factor depends on the ton. 1 kg is 0.001102 tons (US short ton), 0.001 tons (metric ton or tonne), 0.000984 tons (UK long ton).

### What is the difference between a ton and a tonne?

A tonne is the metric ton, 1,000 kg. In the US, a ton is the short ton, 2,000 lb (907.18474 kg). The UK long ton is 2,240 lb (1,016.0469088 kg). All three come from the exact definitions in NIST SP 811.

## Sources

- NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B.8. https://www.nist.gov/pml/special-publication-811