Reference

Area

Area Measure
144 square inches (in)	1 square foot (ft)
9 ft	1 square yard (yd)
1 yd	1,296 in
30 ¼ yd	1 sq rod
1 sq rod	272 1.4 ft
160 sq rods	1 acre
1 acre	43,560 ft
640 acres	1 sq mile (mi)

Units of Area Measure
1 mi2	259 Hectares (ha), 640 acres, 2.59 km2
0.3861 mi2	100 ha, 247 acres, 1 mi2
24.71 acres	10 ha
10 acres	4.047 ha
2.471 acres	1 ha
1 acre	4047 ha

Length

Units of Length
1 mi or 5,280 ft	1.6093 kilometers (km)
0.621 mi	1000 meters (m), 1 km
328 ft	100 m
3.281 ft	100 centimeters (cm), 1 m
1 yd or 3 ft	91.44 cm or 36 in
1 ft or 12 in	30.48 cm
1 in	2.540 cm
0.3934 in	1 cm

Linear Measure
12 inches (in)	1 foot (ft)
3 ft	1 yard (yd)
5 ½ yd (16 ½ ft)	1 rod
40 rods (220 yd)	1 furlong
8 furlongs (5,280 ft)	1 mile (mi)
3 mi	1 league
6,076 ft	1 intl. nautical mi

Liquid Measure

Teaspoons
3 tsp	1 Tbs

Tablespoons
2 Tbs	1/8 cub or 1 fl oz
4 Tbs	¼ cup or 2 fl oz
8 Tbs	½ cup or ¼ pint (pt)
16 Tbs	1 cup or ½ pt

Cups, Pints, Quarts
2 cups	1 pt or 16 fl oz
2 pt	1 quart (qt)
4 qt	1 gallon (gal)

Gallons, Qunces
2.642 gal	10 liters (L)
1 gal	3.7852 L
1.0567 qt	1 L
1 qt or 32 fl oz	0.9463 L
1 pt or 16 fl oz	0.4732 L
1 cup or 8 fl oz	0.2366 L
1 fl oz	0.0295 L

Slope Equivalents

Percent	Degree	Ratio
10%	6	=1:10
18%	10	=1:6
25%	14	=1:4
33%	18	=1:3
50%	26	=1:2
100%	45	=1:1

Cubic Measure

1,728 cubic inches (in)	1 Tbs
27 ft	1 cubic yard (yd)

Material Weights per Cubic Yard
Loam (loose)	2,200 lbs
Loam (compact)	2,550 lbs
Clay (compact)	2,700 lbs
Clay (wet)	3,050 lbs
Clay sand (compact)	3,250 lbs
Silty sand (wet)	3,100 lbs
Sand (dry)	2,700 lbs
Gravel	3,450 lbs
Crushed Stone	3,600 lbs
Peat moss (compact)	450 lbs
Peat moss (loose)	110 lbs
Water	1,685 lbs

Dry Measure

2 pt	1 qt (67.2 in)
8 qt	1 peck, 637.6 in, 16 pt
4 pecks	1 bushel, 2550.2 in, 32 qt

Temperature

To convert Celsius into Fahrenheit
F = (C x 1.8) divided by 32

To convert Fahrenheit into Celsius
C = (F – 32) x 0.555

Comparison of Degrees

Fahrenheit	Celsius
110	43
100	37.8
90	32.2
80	26.7
70	21.1
60	15.6
50	10
40	4.4
32	0
20	-6.7
10	-12.2
0	-17.8
-10	-23.3
-20	-28.9