Formulas/Measures




Cubic Measure
1 cu. ft. = 1.728 cu. in.
1 cu. yd. = 27 cu. ft
1 cord = 120 cu. ft.
1 ton = 40 cu. ft.
1 st. bu. = 2,150 cu. in.
1 US gal. = 231 cu. in.


Linear Measure
1 centimeter = 0.3937 in.
1 inch = 2.54 cent.
1 decimeter = 0.328 ft.
1 foot = 3.048 dec.
1 meter = 39.37 in.
1 yard = 0.9144 meter
1 dekameter = 1.9884 rods
1 rod = 0.5029 dek.
1 mile = 1.609 kil.
12 inches = 1 foot
3 feet = 1 yard
5.5 yards = 1 rod
Square Measure
1 sq. ft. = 144 sq. in.
1 sq. yd. = 9 sq. ft.


Decimal Equivalents of
Inches/Foot

1" = .083
2" = .167
3" = .250
4" = .333
5" = .417
6" = .500
7" = .583
8" = .667
9" = .750
10"= .833
11"= .917
12"= 1.00


Area of a square = length * height
Area of a rectangle = length * height
Area of a triangle = base * .5height
Circumference of a circle = diameter * 3.1416
Area of a circle = square of radius * 3.1416