Metric Spur Gear Calculator

These calculators will give you results for a simple two gear train.

The first calculator is for a metric gear train and the second for an imperial gear train.

SPUR GEAR CALCULATOR - MODULE

Enter your values as required for module, number of teeth, pressure angle and ratio.

NORMAL MODULE:

NUMBER OF TEETH - FIRST GEAR:

PRESSURE ANGLE:

GEAR RATIO:

CENTRE DISTANCE (A): mm

BOTH GEARS

ADDENDUM: mm

DEDENDUM: mm

TOOTH DEPTH: mm

NORMAL PITCH (PN): mm

NORMAL TOOTH THICKNESS AT PITCH CIRCLE (SN): mm

FIRST GEAR

PITCH CIRCLE DIAMETER (D): mm

TIP DIAMETER (DA): mm

ROOT DIAMETER (DR): mm

SECOND GEAR

NUMBER OF TEETH - SECOND GEAR:

PITCH CIRCLE DIAMETER (D): mm

TIP DIAMETER (DA): mm

ROOT DIAMETER (DR): mm

SPUR GEAR CALCULATOR - DP

Enter your values as required for dp, number of teeth, pressure angle and ratio.

DP:

NUMBER OF TEETH - FIRST GEAR:

PRESSURE ANGLE:

GEAR RATIO:

CENTRE DISTANCE (A): Inches

BOTH GEARS

ADDENDUM: Inches

DEDENDUM: Inches

TOOTH DEPTH: Inches

NORMAL PITCH (PN): Inches

NORMAL TOOTH THICKNESS AT PITCH CIRCLE (SN): Inches

FIRST GEAR

PITCH CIRCLE DIAMETER (D): Inches

TIP DIAMETER (DA): Inches

ROOT DIAMETER (DR): Inches

SECOND GEAR

NUMBER OF TEETH - SECOND GEAR:

PITCH CIRCLE DIAMETER (D): Inches

TIP DIAMETER (DA): Inches

ROOT DIAMETER (DR): Inches