Aluminum 1.5 mm²
- One conductor resistance
- 1.884267 Ω
- Two-conductor loop
- 3.768533 Ω
- Area
- 1.5 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
VALICALC · TECHNICAL REFERENCE
Wire Resistance Chart
Compare copper and aluminum bulk wire resistance by area, length and conductor temperature. Transfer the selected conditions to Voltage Drop.
ValiCalc · Wire Resistance Chart
https://www.valicalc.com/wire-resistance-chart
Dataset v1.2.0 · verified 2026-10-06
Print the selected answer, conditions, scope and source summary.
Display: metric. One-way conductor length: 100 m · Conductor temperature: 20 °C
SCENARIO MATRIX
Search within the verified subset. Numeric sizes match complete designations; a nearby size is a candidate, not an exact match.
SELECTED REFERENCE
Copper 4 mm²
- One conductor resistance
- 0.431025 Ω
- Two-conductor loop
- 0.86205 Ω
- Area
- 4 mm²
All fields & cell provenance
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
- Material / area: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06 · source value Copper 4 mm².
- One conductor resistance: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06.
- Two-conductor loop: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06.
- Area: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06 · source value 4.
- Material: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06 · source value Copper.
- ρ at 20°C: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06 · source value 0.017241.
- Temperature coefficient: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06 · source value 0.00393.
- ρ at selected temperature: Copper wire bulk resistance method — Bulk material properties and authored R=ρL/A scenarios · verified 2026-10-06.
v1.2.0 · verified 2026-10-06 · values use the valid conditions shown above
Use this value
Review the selected values and units in the calculator before applying them.
Use area, length and temperature →Use reviewed values in cable resistance →Copper 4 mm²0.431025 ΩBack to answer ↑
Explore the verified data
22 matching rows · 22 in this subset
| Material / area | One conductor resistance | Two-conductor loop | Area | Actions |
|---|---|---|---|---|
| Aluminum 1.5 mm² | 1.884267 Ω | 3.768533 Ω | 1.5 mm² | |
| Copper 1.5 mm² | 1.1494 Ω | 2.2988 Ω | 1.5 mm² | |
| Aluminum 2.5 mm² | 1.13056 Ω | 2.26112 Ω | 2.5 mm² | |
| Copper 2.5 mm² | 0.68964 Ω | 1.37928 Ω | 2.5 mm² | |
| Aluminum 4 mm² | 0.7066 Ω | 1.4132 Ω | 4 mm² | |
| Copper 4 mm² | 0.431025 Ω | 0.86205 Ω | 4 mm² | |
| Aluminum 6 mm² | 0.471067 Ω | 0.942133 Ω | 6 mm² | |
| Copper 6 mm² | 0.28735 Ω | 0.5747 Ω | 6 mm² | |
| Aluminum 10 mm² | 0.28264 Ω | 0.56528 Ω | 10 mm² | |
| Copper 10 mm² | 0.17241 Ω | 0.34482 Ω | 10 mm² | |
| Aluminum 16 mm² | 0.17665 Ω | 0.3533 Ω | 16 mm² | |
| Copper 16 mm² | 0.107756 Ω | 0.215513 Ω | 16 mm² | |
| Aluminum 25 mm² | 0.113056 Ω | 0.226112 Ω | 25 mm² | |
| Copper 25 mm² | 0.068964 Ω | 0.137928 Ω | 25 mm² | |
| Aluminum 35 mm² | 0.080754 Ω | 0.161509 Ω | 35 mm² | |
| Copper 35 mm² | 0.04926 Ω | 0.09852 Ω | 35 mm² | |
| Aluminum 50 mm² | 0.056528 Ω | 0.113056 Ω | 50 mm² | |
| Copper 50 mm² | 0.034482 Ω | 0.068964 Ω | 50 mm² | |
| Aluminum 70 mm² | 0.040377 Ω | 0.080754 Ω | 70 mm² | |
| Copper 70 mm² | 0.02463 Ω | 0.04926 Ω | 70 mm² |
Copper 1.5 mm²
- One conductor resistance
- 1.1494 Ω
- Two-conductor loop
- 2.2988 Ω
- Area
- 1.5 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 2.5 mm²
- One conductor resistance
- 1.13056 Ω
- Two-conductor loop
- 2.26112 Ω
- Area
- 2.5 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 2.5 mm²
- One conductor resistance
- 0.68964 Ω
- Two-conductor loop
- 1.37928 Ω
- Area
- 2.5 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 4 mm²
- One conductor resistance
- 0.7066 Ω
- Two-conductor loop
- 1.4132 Ω
- Area
- 4 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 4 mm²
- One conductor resistance
- 0.431025 Ω
- Two-conductor loop
- 0.86205 Ω
- Area
- 4 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 6 mm²
- One conductor resistance
- 0.471067 Ω
- Two-conductor loop
- 0.942133 Ω
- Area
- 6 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 6 mm²
- One conductor resistance
- 0.28735 Ω
- Two-conductor loop
- 0.5747 Ω
- Area
- 6 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 10 mm²
- One conductor resistance
- 0.28264 Ω
- Two-conductor loop
- 0.56528 Ω
- Area
- 10 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 10 mm²
- One conductor resistance
- 0.17241 Ω
- Two-conductor loop
- 0.34482 Ω
- Area
- 10 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 16 mm²
- One conductor resistance
- 0.17665 Ω
- Two-conductor loop
- 0.3533 Ω
- Area
- 16 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 16 mm²
- One conductor resistance
- 0.107756 Ω
- Two-conductor loop
- 0.215513 Ω
- Area
- 16 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 25 mm²
- One conductor resistance
- 0.113056 Ω
- Two-conductor loop
- 0.226112 Ω
- Area
- 25 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 25 mm²
- One conductor resistance
- 0.068964 Ω
- Two-conductor loop
- 0.137928 Ω
- Area
- 25 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 35 mm²
- One conductor resistance
- 0.080754 Ω
- Two-conductor loop
- 0.161509 Ω
- Area
- 35 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 35 mm²
- One conductor resistance
- 0.04926 Ω
- Two-conductor loop
- 0.09852 Ω
- Area
- 35 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 50 mm²
- One conductor resistance
- 0.056528 Ω
- Two-conductor loop
- 0.113056 Ω
- Area
- 50 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 50 mm²
- One conductor resistance
- 0.034482 Ω
- Two-conductor loop
- 0.068964 Ω
- Area
- 50 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
Aluminum 70 mm²
- One conductor resistance
- 0.040377 Ω
- Two-conductor loop
- 0.080754 Ω
- Area
- 70 mm²
More dimensions
- Material
- Aluminum
- ρ at 20°C
- 0.028264 Ω·mm²/m
- Temperature coefficient
- 0.00403 1/°C
- ρ at selected temperature
- 0.028264 Ω·mm²/m
Copper 70 mm²
- One conductor resistance
- 0.02463 Ω
- Two-conductor loop
- 0.04926 Ω
- Area
- 70 mm²
More dimensions
- Material
- Copper
- ρ at 20°C
- 0.017241 Ω·mm²/m
- Temperature coefficient
- 0.00393 1/°C
- ρ at selected temperature
- 0.017241 Ω·mm²/m
How to use this data
ρ(T)=ρ20[1+α(T−20)]; Rone=ρ(T)L/A; Rloop=2Rone. Length is one-way, in metres. This is resistance lookup, not a current-carrying-capacity chart.
CHECK THE METHOD
Worked example
Copper 4 mm², 100 m and 20°C gives 0.431025 Ω per conductor and 0.86205 Ω for a two-wire loop.
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Common lookup questions
Can I use these values as a universal specification?
Geometry and bulk resistance do not establish ampacity, installation method, insulation rating, derating or electrical-code compliance. Diameter is the equivalent bare solid conductor, not finished cable OD.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.2.0
Last verified:
22 generated bulk-conductor scenarios. Copper uses annealed IACS values; aluminum uses the existing EC-aluminum model. Product stranding/alloy/AC effects are not included.
Values are curated product facts or generated scenarios. Paid standards, complete catalogs and source diagrams are not reproduced. A verification date applies to this documented subset.
Copper wire bulk resistance method ↗
Type B · US Bureau of Standards · Circular 31, 2nd edition, 1914
Selected government-authored engineering facts; source conditions are retained.
Full provenance & artifact record
- Source checked
- 2026-10-06
- Use basis
- public-domain
- Artifact SHA-256
- No retained source artifact hash; see the stated source and verification record.
Aluminum wire tables ↗
Type B · US Bureau of Standards · Handbook 109, 1972
Selected government-authored engineering facts; source conditions are retained.
Full provenance & artifact record
- Source checked
- 2026-10-06
- Use basis
- public-domain
- Artifact SHA-256
- No retained source artifact hash; see the stated source and verification record.