SWG to SQMM Calculator – Fast & Accurate Wire Conversion
Convert wire sizes easily with our SWG to SQMM calculator. Get precise results for electrical, industrial, and DIY projects in seconds. Use this guide to understand and calculate SWG to square millimeters step by step.
SWG to Area Converter
How to Use the SWG to SQMM Calculator
Follow these simple steps to use the SWG to SQMM calculator:
- Step 1: Enter the SWG (Standard Wire Gauge) value in the input field.
- Step 2: Click the "Calculate" button.
- Step 3: View the result instantly in square millimeters (sqmm).
- Step 4: Use the result for wire selection, load calculation, or electrical planning.
- Always double-check the SWG value before calculating.
- Use standard charts for verification if needed.
- Ideal for electricians, engineers, and students.
How to Convert SWG to SQMM (Step-by-Step)
Converting SWG to SQMM requires knowing the wire diameter first. SWG values represent specific diameters defined by the Standard Wire Gauge system.
Step-by-Step Conversion
- Step 1: Find the diameter of the SWG wire (in mm) from a standard SWG table.
- Step 2: Use the formula to calculate cross-sectional area:
Area (sqmm) = (π / 4) × (Diameter)²
- Step 3: Substitute the diameter value into the formula.
Example Calculation: Convert SWG 10 to SQMM
Step 2: Area = (π / 4) × (3.251)²
Step 3: Area ≈ 0.785 × 10.569
Step 4: Area ≈ 8.30 sqmm
Final Answer: SWG 10 ≈ 8.30 sqmm
SWG to SQMM Conversion Chart
Common wire sizes for quick reference based on standard SWG tables:
| SWG | Diameter (mm) | Area (sqmm) |
|---|---|---|
| 6 | 4.876 | 18.68 |
| 8 | 4.064 | 12.97 |
| 10 | 3.251 | 8.30 |
| 12 | 2.642 | 5.48 |
| 14 | 2.032 | 3.24 |
| 16 | 1.626 | 2.08 |
| 18 | 1.219 | 1.17 |
| 20 | 0.914 | 0.66 |
| 22 | 0.711 | 0.40 |
| 24 | 0.559 | 0.25 |
Note: Values are approximate and based on standard SWG tables.
FAQs – SWG to SQMM Calculator
SWG stands for Standard Wire Gauge. It measures wire thickness.
SQMM (square millimeters) shows the cross-sectional area of a wire.
You convert SWG to SQMM to calculate current capacity and select the right wire size.
No. SWG and AWG are different standards with different values.
Yes. Use the formula: Area = (π/4) × diameter², but you need the diameter value from an SWG table.
Yes. It provides accurate results based on standard wire data and mathematical formulas.
SWG is commonly used in the UK and some Asian countries like India.
Electrical design tools, load calculators, and wiring systems use SQMM values for cable sizing.
No. SQMM only measures the conductor's cross-sectional area, not the insulation thickness.
SQMM is better for technical calculations because it directly represents the wire’s cross-sectional area, which is proportional to its current-carrying capacity.