Free online conduit fill calculator for electrical installations
Free Online Tool
Determine the right conduit size for your cables with our free online calculator. Calculate fill rates and ensure compliance with installation standards.
Automatically calculate conduit fill percentage based on cable sizes and quantities.
Support for various cable types and sizes with accurate cross-sectional area data.
Key Features
Use immediately
No account needed
100% free
Visual indicator
Color-coded status
Compliance check
Multiple cable types
Complex installations
Unlimited cables
Auto recommendations
Minimum size
Standard compliant
Comprehensive list
Accurate diameters
All cable types
Works on any device
On-site calculations
Phone friendly
Visual Results
Our calculator shows fill percentage with an intuitive visual display. Know instantly if your conduit selection is compliant.
Automatic compliance check against the 40% fill limit for multiple cables
See the total cross-sectional area of all cables in the conduit
Free to use, no registration required. Get your results instantly.
