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Calculators

Imperial and Metric Tap drill size calculators

Find hole size or thread percentage for cutting taps and cold forming taps in both imperial and metric sizes

Unified imperial screw thread calculator

Calculate Major, minor and pitch diameters of Unified national external and internal thread form

Metric Screw Threads: M Profile

Calculate Major, minor and pitch diameters of M Profile external and internal thread form

True Position Calculator

Tool to calculate the true position of the center axis

Calculateur de Position

Outil pour calculer la position réelle de l'axe central

Bolt hole circle pattern calculator

Convert Decimal degrees to and from sexageimal: degrees, minutes, seconds

ISO Metric Tolerance Zone Calculator

Determine and calculate ISO tolerance zone deviation for metric fits

ISO Metric Tolerance Builder

Free ISO Metric Tolerance Zone calculator. Evaluate any tolerance quickly and easily

RPM and Feed

Calculate RPM using SFM and Diameter of Tool/Stock

Calculate SFM using RPM and Diameter of Tool/Stock

Calculate IPM using RPM, Chip load and number of cutting edges

Calculate Chip load using RPM, IPM and number of cutting edges

Calculate Material removal rate using IPM, depth of cut and width of cut

Surface finish

Calculate scallop height using tool diameter and step over distance

Calculate step over distance using tool diameter and scallop height

Calculate tool diameter using scallop height and step over distance

Calculate scallop height using tool tip radius and step over distance

Calculate step over distance using tool tip radius and scallop height

Calculate tool tip radius using scallop height and step over distance

4th axis calculators

Convert degrees per minutes to inch per minute

Convert inch per minutes to degrees per minute

Calculate position from center using degrees per minute and feed per minute

Unit convert

Convert inches(in) to and from millimeters(mm)

Convert inches(in) to and from centmeters(cm)

Convert feets(ft) to and from meters(m)

Convert ounces(oz) to and from grams(g)

Convert pounds(lb to and from grams(g)

Convert pounds(lb) to and from kilograms(kg)

Convert US ton(short ton) to and from kilograms(kg)

Convert US ton(short ton) to and from Metric ton(t)

Convert UK ton(long ton) to and from kilograms(kg)

Convert UK ton(long ton) to and from Metric ton(t)

Convert Decimal angle to and from Sexagesimal angle; degrees, minutes, seconds

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TheoreticalMachinist Charts

Windows Apps

JcTimer

TheoreticalMachinist Chart

TheoreticalMachinist Checksum Generator

Charts

Decimal equivalents

Suface finish/texture/roughness

Tap drill size; Common tap drill sizes

Tap drill size; Thread percentages

Common threads

Fractions convert

Imperial National Pipe Thread tap drill size

British and ISO Pipe thread tap drill size

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Tap drill size calculators

Imperial inch Tap drill size calculators

Calculate cutting tap drill size using outside diameter, threads per inch and thread percentage

Calculate cold forming tap drill size using outside diameter, threads per inch and thread percentage

Calculate thread percentage of cutting using outside diameter, threads per inch and tap drill size

Calculate thread percentage of cold forming tap using outside diameter, threads per inch and tap drill size

Metric Tap drill size calculators

Calculate cutting tap drill size using outside diameter, threads per inch and thread percentage

Calculate cold forming tap drill size using outside diameter, threads per inch and thread percentage

Calculate thread percentage of cutting using outside diameter, threads per inch and tap drill size

Calculate thread percentage of cold forming tap using outside diameter, threads per inch and tap drill size

Updated: 27 June 2013