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This is an old revision of this page, as edited by Michael Glass (talk | contribs) at 12:39, 13 June 2012 (Proposal to change the text to reflect the difference between the International and US Survey measurements: new section). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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Value in acres

I was checking the values listed on this page. The page currently says that 1 sq km equals 247.105383 acres.

The GNU units program gives 247.10439 acres

The National Oceanographic Data Center say 247.105381 acres [1]

The Google calculator also says 247.105381 acres [2]

I think 247.105381 is probably right. It is a pretty minor thing but it would be good to get it right. I will try to do some more checking, but welcome any comments from others. -- Popsracer 11:21, 29 Sep 2003 (UTC)

1 sq km = 1,000,000 sq m
0.30482 sq m = 1 sq ft
16.52 sq ft = 1 sq rod
160 sq rods = 1 acre
1 sq km = 247.105381467 acres
er... I think... Evil saltine 11:44, 29 Sep 2003 (UTC)
GNU Units assumes the U.S. survey acre instead of the international acre. The figure 247.105383 has an error in its last digit. -- Indefatigable 16:58, 30 Sep 2003 (UTC)
That's why the metric system is the best. A metre is a metre is a metre, and a kilometre is a kilometre is a kilometre. None of this business of having to remember whether you're British or American, land-based or nautical, civilian or military, and so on. JIP | Talk 18:30, 22 September 2008 (UTC)[reply]
Oh yeah. metric system is the best.78.106.148.243 (talk) 16:15, 3 February 2009 (UTC)[reply]

You'll certainly get a 'squire deal' of of this measurment, sir! --Arma Martin 3nd 03:34, 26 January 2007 (UTC)[reply]

Trouble is that we have two slightly different values for both the acre and the square mile, one for the International measurements and the other for the US Survey measurements. The text will have to be changed to reflect this fact. Michael Glass (talk) 06:28, 12 June 2012 (UTC)[reply]

Proposal to change the text to reflect the difference between the International and US Survey measurements

At the moment, the text reads:

and

  • 1 square mile = 2.58998811km2
  • 1 acre = 0.004047km2, 0.4047ha or 4047 m2

2.47 acres/ha

No source is given for these figures, and the text does not reflect the fact that there are in fact two very slightly different miles in use in the United States. My proposal is to use the figures from unitconversion.org. This would make the text read as follows:

and

  • 1 square mile (International) = 2.58998811km2
  • 1 square mile (US Survey) = 2.58999847km2
  • 1 acre (International) = 0.004046856km2, 0.4047ha or 4047 m2
  • 1 acre (US Survey) = 0.004046873km2, 0.4047ha or 4047 m2 [2]

This, of course presumes that UnitConversion.org is right. What do others think? Michael Glass (talk) 12:39, 13 June 2012 (UTC)[reply]

  1. ^ "UnitConversion.org Area Converter". web page. UnitConversion.org. 2009. Retrieved 13 June 2012.
  2. ^ "UnitConversion.org Area Converter". web page. UnitConversion.org. 2009. Retrieved 13 June 2012.