Formula

To Get

Having

Rule

Diametral pitch

Circular pitch

Divide 3.1416 by the

diametral pitch.

Pitch diameter and

Circular pitch

Divide the pitch diameter by

number of teeth

the product of 0.3183 and

the number of teeth.

Outside diameter and

Circular pitch

Divide the outside diameter

number of teeth

by the product of 0.3183 and

the number of teeth plus 2.

Number of teeth and

Pitch diameter

The product of the number

circular pitch

of teeth, the circular pitch,

and 0.3183.

Number of teeth and

Pitch diameter

Divide the product of the

outside diameter

number of teeth and the

outside diameter by the

number of teeth plus 2.

Outside diameter and

Pitch diameter

Subtract from the outside

circular pitch

diameter the product of the

circular pitch and 0.6366.

Addendum and

Pitch diameter

Multiply the number of teeth

number of teeth

by the addendum.

Number of teeth and

Outside diameter

The product of the number

circular pitch

of teeth plus 2, the circular

pitch, and 0.3183.

Pitch diameter and

Outside diameter

Add to the pitch diameter

circular pitch

the product of the circular

pitch and 0.6366.

Number of teeth and

Outside diameter

Multiply the addendum by

addendum

the number of teeth plus 2.

Pitch diameter and

Divide the product of the

Number of teeth

circular pitch

pitch diameter and 3.1416

by the circular pitch.

Circular pitch

Chordal thickness

One-half the circular pitch.

AIII-1

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