Wire Size Calculator
Free online wire size calculator. Enter your values and get instant results with the formula, step-by-step working, a worked example and FAQs — everything runs locally in your browser on Calcton, no signup required.
| AWG | 线径 mm | 截面 mm² | 铜线载流 60/75/90 °C |
|---|---|---|---|
| 14 | 1.628 | 2.08 | 15 / 20 / 25 A |
| 12 | 2.053 | 3.31 | 20 / 25 / 30 A |
| 10 | 2.588 | 5.26 | 30 / 35 / 40 A |
| 8 | 3.264 | 8.37 | 40 / 50 / 55 A |
| 6 | 4.115 | 13.30 | 55 / 65 / 75 A |
| 4 | 5.189 | 21.20 | 70 / 85 / 95 A |
| 2 | 6.544 | 33.60 | 95 / 115 / 130 A |
How to use the Wire Size Calculator
- Fill in the inputs with your own numbers — every field shows what it expects.
- The result updates instantly as you type; no "Calculate" click needed.
- Read the result card for the main figure, the step-by-step formula, and practical notes.
Frequently asked questions
Is the Wire Size Calculator free?
Yes — all electrical calculators on Calcton are free, with no sign-up required. Your inputs are processed in your browser and never sent to a server.
Is there a Chinese version of this tool?
Yes. Use the Chinese version link above — it is the same calculator with the interface in Simplified Chinese.
References
Formulas and benchmarks used by this calculator follow these published sources.
KevinContent LeadCalcton Editorial Team · Last updated 2026-06-05
Kevin maintains Calcton's formula verification and content: every calculator cites the standard it implements, worked examples are recomputed programmatically, and health benchmarks follow WHO and international guidelines.
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