Is this calculation free and private?

Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.

What do I need to enter?

Just Number of Conductors in Conduit, Conductor Size, Conduit Bend Radius, Straight Run Length and Coefficient of Friction. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Cable Pulling Tension & Sidewall Pressure Calculator

Calculate maximum allowable cable pulling tension (lbs) and sidewall bearing pressure (SWBP) through electrical conduit bends.

100% free
Private in browser
No signup
No watermarks

Number of Conductors in Conduit

Conductor Size (Circular Mils, e.g. 250kcmil)

Conduit Bend Radius (Inches)

Straight Run Length (Feet)

Coefficient of Friction (COF)

Max Conductor Allowable Tension (lbs)

6,000

Straight Pull Required Tension (lbs)

158

Sidewall Bearing Pressure (lbs/ft)

137

90° Bend Tension Multiplier Factor

1.73

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About Cable Pulling Tension & Sidewall Pressure Calculator

Calculate maximum allowable cable pulling tension (lbs) and sidewall bearing pressure (SWBP) through electrical conduit bends. Enter Number of Conductors in Conduit, Conductor Size and Conduit Bend Radius and the tool works out Max Conductor Allowable Tension, Straight Pull Required Tension and Sidewall Bearing Pressure straight away. Everything runs in your browser, so your data never leaves your device.

How to use Cable Pulling Tension & Sidewall Pressure Calculator

Enter Number of Conductors in Conduit, Conductor Size and Conduit Bend Radius.
Adjust the remaining options (Straight Run Length and Coefficient of Friction) to match your case.
Read Max Conductor Allowable Tension, Straight Pull Required Tension and Sidewall Bearing Pressure in the results panel — copy or download what you need.

Key features

Shows Max Conductor Allowable Tension (lbs)
Shows Straight Pull Required Tension (lbs)
Shows Sidewall Bearing Pressure (lbs/ft)
5 adjustable inputs, results update as you type
No signup, no limits

Frequently asked questions

Is this calculation free and private?: Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the Cable Pulling Tension & Sidewall Pressure Calculator give me?: It works out Max Conductor Allowable Tension, Straight Pull Required Tension, Sidewall Bearing Pressure and 90° Bend Tension Multiplier Factor, updating live as you change the inputs.
What do I need to enter?: Just Number of Conductors in Conduit, Conductor Size, Conduit Bend Radius, Straight Run Length and Coefficient of Friction. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

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