Conduit Size Calculator
Free online conduit fill calculator for electrical installations
Free Online Tool
Calculate Conduit Fill Instantly
Determine the right conduit size for your cables with our free online calculator. Calculate fill rates and ensure compliance with installation standards.
Fill Rate Calculation
Automatically calculate conduit fill percentage based on cable sizes and quantities.
Multiple Cable Types
Support for various cable types and sizes with accurate cross-sectional area data.
Key Features
Simple Yet Powerful
No Registration Required
- Use immediately
- No account needed
- 100% free
Fill Percentage
- Visual indicator
- Color-coded status
- Compliance check
Add Multiple Cables
- Multiple cable types
- Complex installations
- Unlimited cables
Recommended Size
- Auto recommendations
- Minimum size
- Standard compliant
Cable Database
- Comprehensive list
- Accurate diameters
- All cable types
Mobile Friendly
- Works on any device
- On-site calculations
- Phone friendly
Visual Results
See Your Results Clearly
Our calculator shows fill percentage with an intuitive visual display. Know instantly if your conduit selection is compliant.
40% Fill Rule
Automatic compliance check against the 40% fill limit for multiple cables
Total Cable Area
See the total cross-sectional area of all cables in the conduit
Start Calculating Conduit Sizes Now
Free to use, no registration required. Get your results instantly.