Calculators
Reference

Calculators

All calculators
Voltage Drop
Wire & Ampacity
Conduit & Box Fill
Load & Service
Motors & Transformers
Conversions

Reference

AWG Wire Chart
Ampacity Chart
Conduit Fill Chart
NEMA Plug Chart
Wire Color Codes

Load & Service

kW, kVA, amps, and service sizing calculations.

kW / kVA to Amps: Convert kW or kVA to amps for single-phase or three-phase systems.
Breaker Size Calculator: Determine the minimum overcurrent protection device (OCPD) size for a given load.
Generator Sizing Calculator: Estimate the kW generator size needed for your load list.

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Free electrical calculators for electricians and engineers. For estimation only.

Calculators

Voltage Drop
Wire Size
Conduit Fill
Breaker Size
All calculators →

Reference

AWG Wire Chart
Ampacity Chart
Conduit Fill Chart
NEMA Plug Chart
Wire Color Codes

For reference only. Verify all results with the current NEC, local codes, and a licensed electrician before any real installation. Full disclaimer