This converter turns tonnes into long tons instantly, using the exact factor 1 tonne = 0.9842065276 long tons. 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 metric ton: exactly 1,000 kilograms, used for freight and vehicle mass. The long ton: 2,240 pounds, historically used in the UK and for shipping displacement.
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
tonnes- The amount you are converting, measured in tonnes
0.9842065276- The exact number of long tons in one tonne
long tons- The converted result
How it works, step by step
- Enter the number of tonnes you want to convert.
- The value is multiplied by 0.9842065276, the exact conversion factor.
- The result is displayed in long tons, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 tonnes
Multiply 5 by 0.98420653. That gives 4.921 long tons. A quick sanity check: one tonne is smaller than one long ton, so the number should get smaller — and it does.
Converting 72 tonnes
72 × 0.98420653 = 70.8629 long tons. Working backwards, 70.8629 ÷ 0.98420653 returns 72 tonnes, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many long tons are in one tonne?
Exactly 0.9842065276. 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 tonnes to long tons?
Long Tons = tonnes × 0.9842065276. To reverse it, divide instead: tonnes = long tons ÷ 0.9842065276, which is the same as multiplying by 1.016046909.
Is the tonne bigger than the long ton?
No. One tonne is only 0.984207 of a long ton, so the long ton is the larger unit.
Why does my answer differ slightly from other tonnes to uk-tons 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 tonne?
The metric ton: exactly 1,000 kilograms, used for freight and vehicle mass.
What is a long ton?
The long ton: 2,240 pounds, historically used in the UK and for shipping displacement.
Tonnes to long tons reference table
| Tonnes | Long Tons |
|---|---|
| 0.5 t | 0.492103 ton |
| 1 t | 0.984207 ton |
| 2 t | 1.9684 ton |
| 3 t | 2.9526 ton |
| 5 t | 4.921 ton |
| 10 t | 9.8421 ton |
| 15 t | 14.7631 ton |
| 20 t | 19.6841 ton |
| 25 t | 24.6052 ton |
| 50 t | 49.2103 ton |
| 75 t | 73.8155 ton |
| 100 t | 98.4207 ton |
| 250 t | 246.0516 ton |
| 500 t | 492.1033 ton |
| 1000 t | 984.2065 ton |
Exact factor: 1 tonne = 0.9842065276 long tons. Values rounded for display.