value of pi
3.14
circumference of a circle
C = Pi x diameter
or
C = Pi x 2 x Radius
Area of a rectangle
A = length x width
Area of a circle
A = Pi x R^2
Area of a triangle
A = 1/2 x base x height
Volume of a cylinder
V = Pi x R^2 x height
Volume of a cube
V = length x width x height
Convert Feet to Inches
Ft x 12
Convert Inches to Meters
Meters x 39.37= Inches
Convert Meters to Millimeters
Meters x 1000
Calculate board foot measure
T x W ÷12 x L
Square feet to how many sheets of 4x8 Plywood/Drywall
Square feet ÷ 32
Volume of Sphere
4 ÷ 3 x π r3
of sheets of plywood for a roof
area of roof ÷ 32
Volume of Cylinder
area of circle x height
example:
MM to CM
1MM=.01CM