Conversion factors

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from to × by
ft m 0.3048
m ft 3.281
in mm 25.40
mile km 1.609
acre ha 0.4047
ha acre 2.471
sq mi ha 259.0
sq mi km2 2.590
sq mi acre 640.0
bblBarrels m3 0.1590
m3 bblBarrels 6.290
scfStandard cubic feet m3 0.02832
m3 scfStandard cubic feet 35.31
boeBarrels of oil equivalent[1] BtuBritish thermal units ca. 5.80 × 106
scfStandard cubic feet BtuBritish thermal units ca. 1050
scfStandard cubic feet boeBarrels of oil equivalent ca. 1.79 × 10–4
boeBarrels of oil equivalent scfStandard cubic feet ca. 5600[2]
lb kg 0.4536
Pa Nm2 1
bar kPa 100
psi kPa 6.895
at[3] kPa 98.07
atm kPa 101.3
Torr kPa 0.1333

Notes and references

  1. See Volume conversion
  2. Some sources round to 6000.
  3. http://en.wikipedia.org/wiki/Technical_atmosphere