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Calculators

Calculate voltage drop, wire resistance, and ampacity for any AWG wire gauge — copper or aluminum, with wire size recommendations per NEC

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Material

Wire Gauge (AWG)

Current (Amps)

One-Way Wire Length (meters)

Round-trip = 60.0 m (196.9 ft)

Supply Voltage (V)

Voltage Drop

4.69 V

3.91%

Acceptable but above 3% branch limit

Total Resistance

0.3127 Ω

Power Loss

70.35 W

Wire Diameter

2.053 mm

Ampacity (75°C)

25 A

AWG	Diameter	Area (mm²)	Ω/km	Amp 60°C	Amp 75°C	Amp 90°C
0000 (4/0)	11.684 mm	107.2	0.1608	195	230	260
000 (3/0)	10.405 mm	85.03	0.2028	165	200	225
00 (2/0)	9.266 mm	67.43	0.2557	145	175	195
0 (1/0)	8.251 mm	53.49	0.3224	125	150	170
1	7.348 mm	42.41	0.4066	110	130	150
2	6.544 mm	33.63	0.5127	95	115	130
3	5.827 mm	26.67	0.6465	85	100	115
4	5.189 mm	21.15	0.8152	70	85	95
6	4.115 mm	13.3	1.296	55	65	75
8	3.264 mm	8.366	2.061	40	50	55
10	2.588 mm	5.261	3.277	30	35	40
12	2.053 mm	3.309	5.211	20	25	30
14	1.628 mm	2.081	8.286	15	20	25
16	1.291 mm	1.309	13.17	10	13	18
18	1.024 mm	0.823	20.95	7	10	14
20	0.812 mm	0.518	33.31	5	7	11
22	0.644 mm	0.326	52.96	3	5	7
24	0.511 mm	0.205	84.22	2.1	3.5	5.5
26	0.405 mm	0.129	133.9	1.3	2.2	3.5
28	0.321 mm	0.081	212.9	0.83	1.4	2.2
30	0.255 mm	0.051	338.6	0.52	0.86	1.4