About Us

The Conduit Fill Calculator exists because electricians, engineers, and DIY installers often face the same question: “How many wires can fit into this conduit safely?”

I wanted a calculator that makes the answer immediately obvious. Enter your wire size, insulation type, and conduit size. The calculator instantly shows whether the configuration meets standard fill limits—so your installation stays safe, efficient, and code-compliant.

What we care about

• Accuracy first. Calculations are based on standard wire area and conduit capacity tables.
• Privacy by default. No login or account is required to use the tool.
• Speed & clarity. The interface is clean, fast, and mobile-friendly—use it on-site during installs.
• Accessibility. Clear typography, keyboard navigation support, and readable layout.

Friendly reminders

• This is a calculation and planning tool—not a substitute for your local electrical code.
• Always verify conduit fill, conductor temperature ratings, and derating guidelines according to your governing electrical standards.

Roadmap

• Support for additional conduit material standards
• Wire bundling / derating recommendations
• Export results as PDF or CSV
• Metric + Imperial switching
• Advanced multi-run project comparison mode

Brand note

This tool is independent and not affiliated with any electrical standards organization or manufacturer. Always confirm compliance with the electrical code applicable in your region.

Say hello

Have feedback, feature ideas, or found a bug? The best way to reach me is the contact page. Your input directly helps improve the tool.

Last updated: November 4, 2025