Cable Size Calculator
Calculate the correct electrical cable size based on current, voltage, cable length, material, and allowable voltage drop.
📘 User Guide (Click to Open)
What is a Cable Size Calculator?
A cable size calculator determines the minimum conductor cross-section required to safely carry electrical current without excessive voltage drop.
Why Voltage Drop Matters
- Excessive voltage drop reduces equipment efficiency
- Can cause overheating and energy loss
- Electrical standards usually limit drop to 2–5%
Calculation Basis
The calculator uses resistivity-based formulas for copper and aluminum conductors, including single-phase and three-phase systems.
How to Use
- Select system type
- Enter voltage and current
- Enter cable length
- Select material and voltage drop
- Click calculate
Typical Use Cases
- Home wiring
- Industrial panels
- Solar installations
- Motor circuits