# Calculator Directory

## Machining Manufacturing Calculators

You can use these calculators to calculate drill size, drilling, milling and turning horsepower, speed and feed, and more..

Advanced Online Speed and Feed Calculator FSWizard
Calculate cutting speeds and feeds for a variety of materials. Estimate cutting forces and determine proper cutting conditions before starting your job.
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Drill Size Chart
The drill size chart provides a list of standard size drill bits in several measurement systems, including fractional, metric, wire gauge number, and letter.

Drilling Horsepower Calculator
Calculate the horsepower required for a drilling operation based on the feed rate and tool diameter, which are used to determine the material removal rate (or metal removal rate).

Drilling Speed and Feed Calculator
Determine the spindle speed (RPM) and feed rate (IPM) for a drilling operation, as well as the cut time for a given cut length.

Milling Horsepower Calculator
Calculate the horsepower required for a milling operation based on the feed rate and depth of cut, which are used to determine the material removal rate (or metal removal rate).

Milling Speed and Feed Calculator
Determine the spindle speed (RPM) and feed rate (IPM) for a milling operation, as well as the cut time for a given cut length. Milling operations remove material by feeding a workpiece into a rotating cutting tool with sharp teeth, such as an end mill or face mill.

Milling Step-over Distance Calculator
The size of the step-over distance and the tool diameter will determine the scallop height between each step. Decreasing the step-over distance will minimize the scallop height, but will require more steps, and therefore more time, to machine the feature.

Tap Size Chart
The tap size chart provides a list of standard size taps, specifying the diameter and thread spacing, for fractional, metric, and screw sizes.

Turning Horsepower Calculator
Calculate the horsepower required for a turning operation based on the feed rate, depth of cut, and cut diameter, which will determine the material removal rate (or metal removal rate).

Turning Speed and Feed Calculator
Determine the spindle speed (RPM) and feed rate (IPM) for a turning operation, as well as the cut time for a given cut length. Turning operations remove material from a rotating workpiece by feeding a single-point cutting tool axially, along the side of the workpiece.

Turning Surface Roughness Calculator
Calculate the surface roughness for a turning operation based on the tool nose radius and the cutting feed (IPR).