DC Wire Size Calculator - AWG, mm2, and Voltage Drop
Calculate recommended DC wire size from current, cable length, voltage, AWG or mm2 conductor size, and allowable voltage drop for low-voltage systems.
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DC Wire Size and Voltage Drop Calculators
DC wire size, cable sizing, voltage drop, AWG to mm2 conversion, 12V wiring, 24V control wiring, and solar DC cable calculators.
Recommended workflow
- Choose the actual use case: control panel, battery, solar, vehicle, or field device
- Enter current, one-way distance, voltage, and allowable drop
- Check recommended size against ampacity, protection, terminals, and local code
Wire Size Calculator DC - Cable Length, Current, and Voltage Drop
Find a practical DC wire gauge by comparing cable length, load current, system voltage, and voltage-drop margin for field wiring.
DC Cable Size Calculator for Battery, Solar, and Control Wiring
Estimate DC cable size for battery, solar, control panel, and low-voltage equipment wiring using current, distance, and voltage-drop limits.
Voltage Drop Calculator DC - 12V, 24V, 48V Wiring
Calculate DC voltage drop percentage, load terminal voltage, and wiring margin for 12V, 24V, 48V, battery, solar, and control circuits.
24V Cable Calculator for PLC Sensors, Solenoids, and Control Panels
Check 24V DC cable voltage drop and recommended wire gauge for PLC sensors, solenoid valves, relays, IO-Link hubs, and control panels.
12V Wire Size Calculator for Battery, RV, Marine, and LED Wiring
Estimate 12V DC wire size for battery loads, RV accessories, marine devices, LED strips, and low-voltage equipment.
Solar DC Cable Size Calculator for PV, Battery, and Inverter Runs
Estimate solar DC cable size and voltage drop for PV strings, battery connections, charge controllers, and low-voltage inverter wiring.
AWG to mm2 Calculator and Wire Size Conversion Table
Convert common AWG wire gauges to approximate mm2 cross-sectional area and compare resistance, ampacity, and practical use cases.
Free preliminary engineering reference for technicians, panel builders, automation engineers, and designers worldwide.