Wire Square Mm Diameter

Reference data and engineering information about wire square mm diameter for electrical applications.

wiresquarediameter

Overview

Engineering reference data for Wire Square Mm Diameter in electrical engineering.

Key Formulas

Ohm's Law

$V = IR$

Voltage = Current × Resistance.

Power

$P = VI = I^2R = V^2/R$

Electrical power.

Energy

$E = Pt$

Energy = Power × Time.

Variables

Symbol	Description	Unit
$V$	Voltage	V
$I$	Current	A
$R$	Resistance	Ω
$P$	Power	W

26 rows

Standard Wire Size Conversion: Cross-sectional Area (mm²) to Conductor Diameter (mm)
Cross-sectional Area(mm²)	Diameter(mm)
0.75	1
1	1.1
1.5	1.4
2	1.5
2.5	1.8
4	2.3
6	2.8
10	3.6
16	4.5
25	5.6
35	6.7
50	8
70	9.5
95	11
120	12.4
150	13.8
185	15.4
240	17.5
300	19.5
400	22.6
500	25.2
630	28.3
800	31.9
1000	35.7
1200	39.1
2000	50.5

Source: engineeringtoolbox.com

Note: The diameters listed are for the bare copper conductor. To find the real outside diameter of a specific cable, you must add the insulation thickness for that cable type.