Pounds to tonnes
1 pound = 0.000453592 tonnes
Type a value in pounds (lb) to get tonnes (t) straight away. A pound is smaller than a tonne, so the number goes down. Both units belong to weight, measured here against the kilogram.
1 lb = 0.00045359237 t
Formula
t = lb × 0.00045359237
One pound is 0.00045359237 tonnes, so multiply by that factor. You can also divide by 2,204.62, the number of pounds in one tonne. Here lb is the value in pounds and t is the result in tonnes.
Worked example: 150 pounds × 0.00045359237 = 0.0680389 tonnes.
Pounds to tonnes table
| pounds (lb) | tonnes (t) |
|---|---|
| 1 lb | 0.000453592 t |
| 2 lb | 0.000907185 t |
| 3 lb | 0.00136078 t |
| 4 lb | 0.00181437 t |
| 5 lb | 0.00226796 t |
| 6 lb | 0.00272155 t |
| 7 lb | 0.00317515 t |
| 8 lb | 0.00362874 t |
| 9 lb | 0.00408233 t |
| 10 lb | 0.00453592 t |
| 15 lb | 0.00680389 t |
| 20 lb | 0.00907185 t |
| 25 lb | 0.0113398 t |
| 30 lb | 0.0136078 t |
| 40 lb | 0.0181437 t |
| 50 lb | 0.0226796 t |
| 60 lb | 0.0272155 t |
| 75 lb | 0.0340194 t |
| 100 lb | 0.0453592 t |
Everyday pounds in tonnes
| What it is | lb | t |
|---|---|---|
| a block of butter (US) | 1 lb | 0.000453592 t |
| a newborn baby (about) | 8 lb | 0.00362874 t |
| a common checked-bag limit | 50 lb | 0.0226796 t |
| an adult body weight | 150 lb | 0.0680389 t |
| a heavy adult | 200 lb | 0.0907185 t |
Quick estimate in your head
Multiply by about 0.00045. For 150 lb that gives 0.0675 t against an exact 0.0680389 t, an error of 0.8%.
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
Pound (lb). The avoirdupois pound, exactly 0.45359237 kg. Used for body weight in the US.
Tonne (t). The metric ton: 1,000 kg. Used for freight, cars and crops.
Going the other way, 1 tonne is 2,204.62 pounds.
Questions
How many tonnes are in 1 pound?
1 pound is 0.000453592 tonnes, and 1 tonne is 2,204.62 pounds.
How do I convert pounds to tonnes?
Use t = lb × 0.00045359237. For example, 150 pounds × 0.00045359237 = 0.0680389 tonnes.
Is the pound 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?
200 lb is 0.0907185 t.
Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).
Related conversions
- tonnes to pounds
- pounds to kilograms
- pounds to ounces
- pounds to stones
- tonnes to kilograms
- kilograms to tonnes