Technical tools

Electrical Calculators for UK Electricians

Fast calculation tools help with checks and learning while keeping the assumptions visible. Final design decisions still require the applicable standards, manufacturer data and competent judgement.

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What it helps with

A connected workflow, not another isolated tool

Voltage-drop calculator

Cable-sizing support

Maximum Zs calculation guidance

Clear inputs and assumptions

Common searches this page answers

electrical calculator UKvoltage drop calculator electricianmax Zs calculatorcable sizing calculator UK

Related learning

Learn the electrical concepts behind the tool

Learning hub

Inspection & testing

Earth Fault Loop Impedance (Zs) Explained

Understand the basic Zs concept: the impedance of the complete earth-fault loop at the point considered and its relationship with fault current.

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