Cables • Wires • Voltage Drop

Cables & Wires Calculators

Choose the right calculator for wire cross-section, voltage drop, cable length, conductor resistance and cable losses. All calculators are clearly laid out and ready to use right away.

Contents 13 calculators in this category

Suitable For Copper, aluminum, three-phase, single-phase and photovoltaic DC.

Available Calculators

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Three-Phase Copper – Power in kW Calculate the wire cross-section for three-phase with a copper cable using power.

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Three-Phase Aluminum – Power in kW Calculate the wire cross-section for three-phase with an aluminum cable.

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Single-Phase Copper – Power in kW Calculate the wire cross-section for single-phase with a copper cable using power.

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Single-Phase Aluminum – Power in kW Calculate the wire cross-section for single-phase with an aluminum cable.

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Three-Phase Copper – Current in Amps Calculate the wire cross-section directly from current for three-phase.

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Single-Phase Copper – Current in Amps Calculate the wire cross-section directly from current for single-phase.

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Calculate Voltage Drop Calculate the voltage drop of a cable from length, current, material and cross-section.

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Calculate Cable Length Calculate the maximum cable length based on voltage drop and cross-section.

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Calculate Conductor Resistance Calculate the resistance of a cable from length, cross-section and material.

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Calculate Cable Loss Roughly calculate the power and energy loss of a cable.

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Calculate Maximum Power Over a Cable Estimate how much power can be transmitted over a cable.

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Calculate Maximum Current Over a Cable Calculate the maximum current based on cross-section and voltage drop.

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Calculate PV DC Cable Cross-Section Roughly calculate the DC cable cross-section for photovoltaic cables.

Notes on Usage

For the practical selection of cables and wires, in addition to the calculation, you should always check installation method, ambient temperature, grouping, protective devices, material and applicable standards.

These calculators provide useful guideline values but do not replace professional planning, inspection or sizing of electrical systems.