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Unit Converter & Tap Drill Chart

Eight unit families, plus ISO metric coarse tapping and clearance drill sizes.

Metric · IS practiceFormula shown with your numbersNothing stored

How this calculator works

Straight conversion between the units that come up daily on a fabrication floor — length, mass, pressure, power, torque, flow, area and temperature. Temperature is handled separately because it needs an offset as well as a scale factor. The tap drill table below gives the ISO metric coarse tapping drill and the clearance drill for each thread size.

Formulas used

Tapping drill (approx.)d = D − P
Celsius to Fahrenheit°F = °C × 9/5 + 32
Celsius to KelvinK = °C + 273.15
Horsepower to kilowattkW = HP × 0.7457

Checked against

5 HP converts to 3.729 kW.

Worth knowing

Tapping drill sizes are for ISO metric coarse threads at approximately 75% thread engagement, which is the normal workshop compromise between thread strength and tap breakage.

Unit Converter & Tap Drill Chart — common questions

What drill size for an M10 tap?
8.5 mm for ISO metric coarse (M10 × 1.5). The rule of thumb is drill diameter = thread diameter minus pitch, which gives about 75% thread engagement.
How do I convert HP to kW?
Multiply by 0.7457. A 5 HP motor is 3.729 kW, which is why it is normally sold as a 3.7 kW frame.

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Got a number you don’t like?

If the sizing is telling you something awkward, send it over. We build these machines — we can tell you whether the number is wrong or the layout is.

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Contact

Chennai, Tamil Nadu

Speak to us

+91 91763 23669

spdynamics25@gmail.com

Eshwar C S

Works & office

T-231 A, Sidco Women's Industrial Park
Kattur, Avadi, Chennai – 600 062
Tamil Nadu, India

GSTIN

33DENPP4793D1Z5

All equipment made to order. Supply, erection and commissioning across India.

Sidco Women’s Industrial Park, Kattur · Avadi, Chennai

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