This converter turns US tons into tonnes instantly, using the exact factor 1 US ton = 0.90718474 tonnes. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The short ton: 2,000 pounds, the standard ton in the United States. The metric ton: exactly 1,000 kilograms, used for freight and vehicle mass.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
US tons- The amount you are converting, measured in US tons
0.90718474- The exact number of tonnes in one US ton
tonnes- The converted result
How it works, step by step
- Enter the number of US tons you want to convert.
- The value is multiplied by 0.90718474, the exact conversion factor.
- The result is displayed in tonnes, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 US tons
Multiply 5 by 0.90718474. That gives 4.5359 tonnes. A quick sanity check: one US ton is smaller than one tonne, so the number should get smaller — and it does.
Converting 72 US tons
72 × 0.90718474 = 65.3173 tonnes. Working backwards, 65.3173 ÷ 0.90718474 returns 72 US tons, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many tonnes are in one US ton?
Exactly 0.90718474. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert US tons to tonnes?
Tonnes = US tons × 0.90718474. To reverse it, divide instead: US tons = tonnes ÷ 0.90718474, which is the same as multiplying by 1.102311311.
Is the US ton bigger than the tonne?
No. One US ton is only 0.907185 of a tonne, so the tonne is the larger unit.
Why does my answer differ slightly from other us-tons to tonnes converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a US ton?
The short ton: 2,000 pounds, the standard ton in the United States.
What is a tonne?
The metric ton: exactly 1,000 kilograms, used for freight and vehicle mass.
Us Tons to tonnes reference table
| Us Tons | Tonnes |
|---|---|
| 0.5 ton | 0.453592 t |
| 1 ton | 0.907185 t |
| 2 ton | 1.8144 t |
| 3 ton | 2.7216 t |
| 5 ton | 4.5359 t |
| 10 ton | 9.0718 t |
| 15 ton | 13.6078 t |
| 20 ton | 18.1437 t |
| 25 ton | 22.6796 t |
| 50 ton | 45.3592 t |
| 75 ton | 68.0389 t |
| 100 ton | 90.7185 t |
| 250 ton | 226.7962 t |
| 500 ton | 453.5924 t |
| 1000 ton | 907.1847 t |
Exact factor: 1 US ton = 0.90718474 tonnes. Values rounded for display.