[Donaldson Tan]

i'm confused which is which.

as far as i know,
1 ton (metric) = 1000kg
1 ton (us) = 907kg
1 ton (uk) = 1016kg

which of the above is tons, and the other tonnes?

[Mitch]

Maybe it's just American vs British spelling?

[movies]

I think Mitch is right.  So 1 ton = 907 kg, 1 tonne = 1016 kg, and a metric ton = 1000 kg.  I think a metric ton is also sometimes referred to as a "long ton" in the US.

[AWK]

Webster says:
1000 kg = 1 tonne or 1 metric ton
907 kg = 1 (short) ton
1016 kg = 1 (long) ton
plurals - always tonnes

[billnotgatez]

This is easily found on internet

tonne = A metric ton.
1 tonne is equal to:
Metric
  kilotonne 0.001
  kilonewton (on Earth surface) 9.806652
  centner 10
  kilogram 1000
  newton (on Earth surface) 9806.652
  carat 5000000
  gram 1000000
  centigram 1e+08
  milligram 1e+09
  microgram 1e+12
  atomic mass unit 6.0225001e+29
Avoirdupois (U.S.)
  long ton 0.98420653
  short ton 1.1023113
  long hundredweight 19.684131
  short hundredweight 22.046226
  stone 157.47304
  pound 2204.6226
  ounce 35273.962
  dram 564383.39
  grain 15432358
Troy
  pound 2679.2289
  ounce 32150.747
  pennyweight 643014.93
  carat 4878048.8
  grain 15432358
  mite 3.0864717e+08
  doite 7.407532e+09
Apothecaries
  pound 2679.2289
  ounce 32150.747
  dram 257205.97
  scruple 771617.92
  grain 15432358
Japanese
  koku 5.5435445
  kann 266.66667
  kinn 1666.6667
  monnme 266666.67
Chinese Imperial
  dan 20
  jin 2000
  liang 20000
  qian 200000
  fen 2000000
  li 20000000
  hao 2e+08
  si 2e+09
  hu 2e+10
Thai
  hap (pikul) 16.666667 **
  chang (kati) 833.33333 **
  tamlung 16666.667 **
  baht (tical) 66666.667 **
Hong Kong
  picul (tam) 16.53467 **
  catty (kan) 1653.467 **
  tael (leung) 26455.472 **
  mace (tsin) 264554.72 **
  candareen (fan) 2645547.2 **
  tael troy 26717.251 **
  mace troy 267172.51 **
  candareen troy 2671725.1 **
Old Russian
  berkovets 6.1048266
  pood 61.048266
  pound 2441.9307
  lot 78141.781
  zolotnik 234425.34
  dolya 22504833
Old German
  doppelzentner 10
  zentner 20
  pfund 2000
Ancient Roman
  centumpondus 30.673341
  meen 1840.4005
  pondus (libra) 3067.3341
  ounce 36808.009
  semiounce 73616.019
  duella 110424.03
  sicilicus 147232.04
  milliaresium 184040.05
  solid 220848.06
  denarium 294464.08
  scruple 883392.23
Ancient Greek
  talent 39.215686 *
  mine 2352.9412 *
  tetradram 58823.529 *
  dram 235294.12 *
  diobol 705882.35 *
  obol 1411764.7 *
  halk 11294118 *
Biblical
  talent 29.394968 *
  mina 1763.6981 *
  shekel 88184.905 *
  pim 132277.36 *
  beka 176369.81 *
  gerah 1763698.1 *

* The value is approximate. The unit does not have an exact value.  
** The value is approximate. It is a best guess

[Donaldson Tan]

Tons is UK, whereas Tonnes is US. Their relationship is as follows:
100tons  = 112 tonnes

[billnotgatez]

geodome -
I am from the USA and I have never heard of this tonne being US versus UK. I hardly ever use the term tonne(s), whereas I have used ton on several occasions. Also, the dictionary does not have your description of tonne. Finally, your description does not really agree with my previous post. Will you please cite your source? I believe you have this mixed up with the relationship between long ton and short ton. My understanding is that tonne is a metric measurement not Avoirdupois (U.S.).
Regards,
Bill

[Donaldson Tan]

I will know when my professor goes throught the worksheet with us.