Welcome to the DC Cable Size Calculator, your go-to tool for selecting the correct DC cable sizes to ensure safety and efficiency in your electrical installations. Whether you’re designing a mobile vehicle system, an industrial project, or any other DC-powered electrical system, our tool helps you size cables accurately.

Our easy-to-use calculator helps you quickly determine the optimal DC cable size based on your specific installation parameters.






Nominal cable rating is based on 30°C. Corrections are applied if conditions differ.

Select the installation method that best describes your conditions.

Choose the grouping category that fits your cable installation setup.


Why Proper DC Cable Sizing Matters

Incorrect cable sizing can lead to various operational and safety issues, such as:

  • Overheating: Undersized cables may overheat under high load, increasing fire risks.
  • Voltage Drop: Poorly sized cables can lead to excessive voltage drop, reducing system performance.
  • Equipment Damage: Using incorrect cable sizes can cause equipment to fail prematurely due to insufficient power delivery.

Using our DC Cable Size Calculator ensures your electrical system is both safe and reliable.

How the DC Cable Size Calculator Works

Our calculator requires basic system details to help you calculate the correct cable size. You will need to provide the following:

  • System Voltage
  • Current (Amperage)
  • Cable Length (Distance)
  • Cable Material (Copper or Aluminum)

Once you enter these details, our tool will provide the ideal DC cable size, ensuring your installation meets safety and performance requirements.

Key Features of the DC Cable Size Calculator

  • Fast, Accurate Results: Get instant and precise cable size recommendations.
  • User-Friendly Interface: No complex technical knowledge required—simply input your system details and let the calculator do the work.
  • Supports Different Systems: Whether for residential installations, industrial projects, or any DC-based system, our calculator is adaptable to your needs.

Start Sizing Your DC Cables with Confidence

Ensure the safety and efficiency of your electrical installations today. Use our Calculator to quickly find the right cable size for your project. By using this tool, you can avoid costly mistakes and enhance your system’s reliability.

Disclaimer: This Cable Size Calculator provides a general guide for cable sizing. Please consult with a qualified electrician or engineer for specific applications and local regulations.

Visit www.calcsquick.com to start sizing your cables now.

Reference: AS/NZS 3000:2018

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