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Conversion factors

Adopted by FAO Forestry and Forest Products Division in June 1947. Tables on "Wood Measures" follow recommendations of the Statistics Conferences held in Washington and Rome in 1947.*

* Inches, feet, and yards are the U. S.: British units.

I. GENERAL MEASURES

Units of Length

Units of Area

Units of Volume

1 inch

=

2.540 cm.

1 square inch

=

6.452 cm²

1 cu. in.

=

16.39 cm³

1 centimeter

=

0.3937 in.

1 cm²

=

0.155 sq. in.

1 cm³

=

0.061 cu. in.

1 foot

=

0.3048 m.

1 square foot

=

0.0929 m²

1 cu. ft.

=

0.02832 m³

1 meter

=

3.281 ft.

1 m²

=

10.76 sq. ft.

1 m³

=

35.31 cu. ft.

1 yard

=

0.9144 m.

1 square mile

=

259 ha.

NOTE: For Wood Measures see, Table II, "Processed Wood" and "Roundwood," below.

1 meter

=

1.094 yd.

1 hectare

=

0.003861 sq. mi.

1 mile

=

1.609 km.

1 acre

=

0.4047 ha.

1 kilometer

=

0.621 mi.

1 hectare

=

2.471 acres

1 yard

=

3 feet = 36 inches

1 square mile

=

640 acres

Units of Capacity Liquid Measure

Units of Mass

Pressure

1 cu. in.

=

0.01639 liter

1 pound

=

0.454 kg.

1 lb./sq. ft.

=

4.882 kg./m²

1 gallon (U. S.

=

3.785 liter

1 kilogram

=

2.205 lb.

1 kg./m²

=

0.2048 lb./sq. ft.

1 gallon (imp.)

=

4.542 liter

1 short ton

=

0.9072 metric tons

1 lb./sq. in.

=

703.1 gm./cm²

1 liter

=

61 cu. in.

1 metric ton

=

1.102 short tons

1 gm./cm²

=

0.0142 lb./sq. in.

1 liter

=

0.2642 gal. (U.S.)

1 long ton

=

1.016 metric tons

1 lb./cu. ft.

=

16.02 kg./m³

1 liter

=

0.3170 gal. (imp.)

1 metric ton

=

0.9842 long tons

1 kg./m³

=

0.06243 lb./cu. ft.

1 gallon

=

4 quarts







1 cu. ft./acre = 0.07 m³/ha.




1 m³/ha. = 14.29 cu. ft./acre

II. WOOD MEASURES

ROUNDWOOD

Product

Unit

Solid Volume Without Dark

Cubic Meters

Cubic Feet

Sawlogs

1,000 board feet

4.53

160

Pulpwood

Cord (128 cu. ft.)

2.55

90

Stere (Raummeter)-coniferous

0.75

26.5

Fuelwood

Cord (128 cu. ft.)

2.12

75

Stere - coniferous

0.70

24.7

Stere - broadleaved

0.65

23.0

PROCESSED WOOD

Solid Volume of Lumber

Equivalent Solid Volume of Sawlogs

Cubic Meters

Cubic Feet

Petrograd Standards

1,000 Board Feet Measure

Cubic Meters

Cubic Feet

1

35.3

0.214

0.424

1.67

59.0

0.0283

1

0.00606

0.012

0.0476

1.68

4.672

165

1

1.98

7.79

275

2.36

83.3

0.505

1

3.96

140

THE Nations accepting this Constitution, being determined to promote the common welfare by furthering separate and collective action on their part for the purposes of

raising levels of nutrition and standards of living of the peoples under their respective jurisdictions,

securing improvements in the efficiency of the production and distribution of all food and agricultural products,

bettering the condition of rural populations,

and thus contributing toward an expanding world economy,

hereby establish the Food and Agriculture Organization of the United Nations... through which the Members will report to one another on the measures taken and the progress achieved in the fields of action set forth above.

- Preamble to the Constitution of the Food and Agriculture Organization of the United Nations

FAO Member Nations

AUSTRALIA
BELGIUM
BOLIVIA
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ECUADOR
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GREECE
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HAITI
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HUNGARY
ICELAND
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IRAQ
IRELAND
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LEBANON
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