Busbar Size Calculator for Copper & Aluminum
Calculate recommended copper or aluminum busbar dimensions and current capacity.
Use this busbar size calculator to estimate copper or aluminum busbar size, current carrying capacity, and cross-section area for electrical power distribution systems.
Busbar Requirements
Design Load
Amps
Material Specs
Recommended Busbar
Standard Profile
Busbar Size (Width × Thickness)
100 × 10
mm
Single Run Arrangement
Operational Metrics
Capacity Data
Maximum Ampacity
0
A
Free air, ~35°C Rise
Total Cross-Section
0
mm²
Total active conductor area
Engineering Reference
Target Current
I_target = Nominal × Margin
Parallel Derating (k)
2 Bars ≈ 1.8 | 3 Bars ≈ 2.5
- Cu ≈ 1.5 - 2.0 A/mm² (General)
- Al ≈ 1.0 - 1.2 A/mm² (General)
- Note = Ampacity based on typical DIN 43671 / IEC approximations for bare rectangular profiles.