WattQuick
Command Center
Calculators

Daily savings, bills, and backup power for your home.

  • Appliance Daily CostAppliances · Appliance
  • Standby Power AggregatorGreen Home · Smart Home
  • Critical Load AnalysisBackup · Backup
  • EV Charging CostEV Charging · EV
  • Smart Thermostat Savings CalculatorGreen Home · HVAC
  • EV Charge TimeEV Charging · EV
  • Appliance Monthly EnergyAppliances · Appliance
  • Battery Cost EstimatorCost · Cost
  • UPS RuntimeBackup · Backup
  • Energy Consumption CalculatorAppliances · Appliance
  • Level 1 vs Level 2 EV Charging TimeEV Charging · EV
  • Electricity Bill EstimatorCost · Cost
  • Electric Heater Cost CalculatorAppliances · Appliance
  • Air Conditioner Energy Cost CalculatorAppliances · Appliance
  • Refrigerator Energy Usage CalculatorAppliances · Appliance
  • EV vs. Gas Car Savings CalculatorEV Charging · EV
  • EV Battery Pre-conditioning Cost CalculatorEV Charging · EV
  • Crypto Mining Power CalculatorAppliances · Appliance
  • Vampire Power Cost CalculatorAppliances · Appliance
  • Standby Power Waste CalculatorAppliances · Appliance
  • Generator Fuel Consumption CalculatorAppliances · Appliance
  • Heat Pump vs. Resistance Heat CalculatorAppliances · Appliance
  • Whole House Energy Budget CalculatorAppliances · Appliance
  • Lighting Circuit Load CalculatorAppliances · Lighting
  • AC Efficiency & Inverter Savings CalculatorAppliances · Cooling
  • Pool Energy Cost & Thermal Cover Savings CalculatorPool · Pool
  • Time-of-Use Load Shifting SavingsTOU · TOU
  • Commercial Demand Charge CalculatorTOU · Demand
  • V2G Grid Buyback Revenue CalculatorTOU · V2G
  • Home Battery Arbitrage ROI CalculatorTOU · Arbitrage
  • Solar & EV Carbon Offset CalculatorTOU · Carbon
  • Grid Frequency Response Reward CalculatorTOU · Grid Services
  • Peak Shaving Potential CalculatorTOU · Peak Shaving
  • Electricity Rate Plan Calculator (TOU vs Flat)TOU · TOU
  • Building Heat Loss & Insulation CalculatorGreen Home · Envelope
  • Home Insulation Savings CalculatorGreen Home · Envelope
  • LED Savings & ROI CalculatorGreen Home · Lighting
  • LED vs. Incandescent ROI CalculatorGreen Home · Lighting
  • Window Solar Heat Gain (SHGC) CalculatorGreen Home · Windows
  • Microgrid ROI CalculatorGreen Home · Microgrid
  • BESS Round-trip Carbon Cost CalculatorGreen Home · Storage
  • Solar Water Heater Efficiency CalculatorGreen Home · Solar thermal
  • Small Wind Turbine Yield CalculatorGreen Home · Wind
Start Planning: WattQuick Wizard
Browse all homeowners toolsView all calculators
My ProjectsBlogAboutContact
WattQuick

139 free micro-calculators for batteries, solar, EV charging, and home power. Instant answers—no account required.

Categories

  • Convert
  • Battery
  • Power
  • Solar
  • EV Charging
  • Appliances
  • Battery Sizing
  • Cost
  • Backup
  • Commercial EV
  • RV & Marine
  • TOU
  • Green Home
  • Pool
  • E-Bike
  • E-Scooter

Company

  • About
  • Blog
  • Contact

Legal

  • Privacy Policy
  • Terms of Service

Network partners

  • MapDiagram
  • CalnexApp

© 2026 WattQuick. All calculators are estimates—for planning only, not professional engineering advice.

All calculators
Convert

Conductor Resistance & Temperature Calculator

Calculate copper or aluminum conductor resistance from cross-section, length, and operating temperature.

WattQuick

Resistance rises ~0.4%/°C above 20°C reference

Resistance at temperature

0.0446Ω

Copper · 6 mm² · 25°C · R₂₀ 0.0438 Ω

Save Report: Download a PDF via JoinMyPDF or add this run to a project for a combined export.

Share this calculator

About Conductor Resistance & Temperature Calculator

Temperature-adjusted resistance

R(T) = R₂₀ × [1 + α(T − 20°C)] where R₂₀ = ρL/A. Copper ρ ≈ 0.0175 Ω·mm²/m; aluminum ρ ≈ 0.0282 Ω·mm²/m at 20°C.

Why it matters for DC cable BOM

Hot conductors increase I²R loss and voltage drop. Size cables using field temperature—not datasheet 25°C values—before quoting wire quantities.

Related calculators

More tools in this category and beyond

  • DC Cable Size CalculatorSizingOpen DC Cable Size Calculator
  • DC Cable Size & Voltage Drop CalculatorSolarOpen DC Cable Size & Voltage Drop Calculator
  • Ohm's Law CalculatorPowerOpen Ohm's Law Calculator
  • Residential AC Voltage Drop CalculatorPowerOpen Residential AC Voltage Drop Calculator