12. CONVERSION TABLES FOR FORESTERS
Abbreviations used in the tables:
ac acre kWh kilowatt hour
BTU British Thermal Unit L litre
c circumference lb pound weight
chn chain m metre
cwt hundred weight ml millilitre
d diameter mm millimetre
ft foot Mw megawatt
gal gallon, Imperial Mwh megawatthour
g gramme Mwy megawatt year
hp horse-power oz ounce weight
in inch QG quarter girth
kca kilocalorie sec second
kg kilogramme t tonne
km kilometre yd yard
kW kilowatt
1. LENGTH AND DISTANCE
|
in
|
x 2.540
|
=
|
miles
|
x 1.609
|
=
|
|
|
= 0.3937
|
x cm
|
|
= 0.6214
|
x km
|
|
in c
|
x 0.8085
|
=
|
yd/ac
|
x 2.259
|
=
|
|
|
= 1.237
|
x cm d
|
|
= 0.4426
|
x m/ha
|
|
ft
|
x 0.3048
|
=
|
miles/mile2
|
x 0.6213
|
=
|
|
|
= 3.281
|
x m
|
|
= 1.610
|
x km/km2
|
|
ft c
|
x 9.702
|
=
|
m/ha
|
x 0.10
|
=
|
|
|
= 0.1031
|
x cm d
|
|
= 10
|
x km/km2
|
|
yd
|
x 0.9144
|
=
|
ft/sec
|
x 1.097
|
=
|
|
|
= 1.094
|
x m
|
|
= 0.9113
|
x km/hr
|
|
chn
|
x 20.12
|
=
|
m/sec
|
x 3.60
|
=
|
|
|
= 0.0497
|
x m
|
|
= 0.2778
|
x km/hr
|
2. AREA AND SECTION
|
in2
|
x 6.452
|
=
|
(ft QG)2/ac
|
x 0.2922
|
=
|
|
|
= 0.1550
|
x cm2
|
|
= 3.423
|
x m2/ha
|
|
(in d)2
|
x 5.067
|
=
|
yd2
|
x 0.8361
|
=
|
|
|
= 0.1974
|
x cm2 section
|
|
= 1.196
|
x m2
|
|
(in c)2
|
x 0.5134
|
=
|
chn2
|
x 0.04047
|
=
|
|
|
= 1.948
|
x cm2 section
|
|
= 24.71
|
x m2
|
|
(in QG)2
|
x 8.214
|
=
|
mile2
|
x 2.590
|
=
|
|
|
x 0.1217
|
x cm2 section
|
|
= 0.3861
|
x km2
|
|
ft2
|
x 0.09290
|
=
|
ac
|
x 0.4047
|
=
|
|
|
= 10.76
|
x m2
|
|
= 2.471
|
x ha
|
|
(ft.d)2
|
x 0.07297
|
=
|
arpent
|
x 0.4209
|
=
|
|
|
= 13.71
|
x m2 section
|
|
= 2.376
|
x ha
|
|
(ft c)2
|
x 0.007393
|
=
|
feddan
|
x 0.420
|
=
|
|
|
= 135.3
|
x m2 section
|
|
= 2.380
|
x ha
|
|
(ft QG)2
|
x 0.1183
|
=
|
donum
|
x 0.1338
|
=
|
|
|
= 8.454
|
x m2 section
|
|
= 7.475
|
x ha
|
|
ft 2/ac
|
x 0.2296
|
=
|
morgen
|
x 0.8567
|
=
|
|
|
= 4.356
|
x m2/ha
|
|
= 1.167
|
x ha
|
