Convert US tons to Tonnes
1 US ton is 0.91 t. One US ton is exactly 0.90718474 tonnes.
One US ton is 0.90718474 tonnes. To convert US tons to tonnes, multiply by 0.90718474; to go the other way, divide by 0.90718474 or multiply by 1.1023113. The factor is exact rather than rounded: it follows from NIST Handbook 44. The short ton: 2,000 pounds.
Factor checked against the defining standard · How we check
- US tons × 0.90718474
1 * 0.90718470.907 t
1 US ton in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 32,000 oz | × 32,000 |
| pounds | 2,000 lb | × 2,000 |
| stone | 142.8571429 st | × 142.857142857 |
| US tons (as entered) | 1 ton | — |
| micrograms | 907,184,740,000 mcg | × 907,184,740,000 |
| milligrams | 907,184,740 mg | × 907,184,740 |
| centigrams | 90,718,474 cg | × 90,718,474 |
| grams | 907,184.74 g | × 907,184.74 |
| kilograms | 907.18474 kg | × 907.18474 |
| slugs | 62.16190034 slug | × 62.1619003431 |
| tonnes | 0.90718474 t | × 0.90718474 |
| carats | 4,535,923.7 ct | × 4,535,923.7 |
| troy ounces | 29,166.66667 ozt | × 29,166.6666667 |
| grains | 14,000,000 gr | × 14,000,000 |
| long tons | 0.8928571429 LT | × 0.892857142857 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert US tons to tonnes? The converter and the working
- 1.Take the measurement in US tons.
- 2.Multiply by 0.90718474 — that is how many tonnes fit in one US ton.
- 3.To go back the other way, divide by 0.90718474, or multiply by 1.1023113.
Worked example: 25 US tons to tonnes
- Formula
- ton × 0.90718474 = t
- Arithmetic
- 25 × 0.90718474 = 22.68 t
- Answer
- 25 ton = 22.68 t
The factor is exact, so this figure is exact too — only the display is rounded.
US tons to tonnes conversion table
| US tons | Tonnes |
|---|---|
| 1 ton | 0.91 t |
| 2 ton | 1.81 t |
| 3 ton | 2.72 t |
| 4 ton | 3.63 t |
| 5 ton | 4.54 t |
| 6 ton | 5.44 t |
| 7 ton | 6.35 t |
| 8 ton | 7.26 t |
| 9 ton | 8.16 t |
| 10 ton | 9.07 t |
| 12 ton | 10.89 t |
| 15 ton | 13.61 t |
| 20 ton | 18.14 t |
| 25 ton | 22.68 t |
| 50 ton | 45.36 t |
| 100 ton | 90.72 t |
| 200 ton | 181.44 t |
| 300 ton | 272.16 t |
| 500 ton | 453.59 t |
| 1000 ton | 907.18 t |
| 2000 ton | 1,814.37 t |
| 5000 ton | 4,535.92 t |
| 10000 ton | 9,071.85 t |
Three different tons, ten per cent apart
The US short ton is 2,000 pounds, or 907.18474 kg. The metric tonne is exactly 1,000 kg. The British long ton is 2,240 pounds, or 1,016.0469088 kg. Freight quotes, emissions figures and scrap prices all use "ton" without saying which, and the spread between the extremes is twelve per cent.
NIST Handbook 44, Appendix C — general tables of units of measurement
What is a US ton?
The short ton: 2,000 pounds. A metric tonne is about 10% heavier and a British long ton about 12%.
What is a tonne?
One thousand kilograms, also called the metric ton — 2,204.6 pounds.
How many tonnes are in a US ton?
One US ton is 0.90718474 tonnes, exactly. Going the other way, one tonne is 1.1023113 US tons. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a US ton.
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- Chicago
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Questions people actually ask
- How many tonnes are in a US ton?
- 0.90718474. One thousand kilograms, also called the metric ton — 2,204.6 pounds.
- How do I convert tonnes back to US tons?
- Divide by 0.90718474, or multiply by 1.1023113 — they are the same operation.
Other weight conversions
Tonnes to US tons — the same conversion the other way.