Electrical Cable Size Calculator

Use load current and cable run length to get a simple cable size recommendation.

Results - Electrical Cable Size Calculator

Enter your measurements and press calculate.

Cable sizing notes

This is a simple guide only. Actual cable selection must consider installation method, grouping, ambient temperature, protective devices and current regulations before installation.

Disclaimer

Material quantities shown are estimates for guidance only. Although typical UK wastage and compaction allowances have been included, actual requirements may vary depending on site conditions, installation methods, and material differences. Please confirm quantities with your installer or supplier before ordering. We accept no liability for inaccuracies, financial loss, or delays arising from the use of these estimates.