Southwire® Voltage Drop Calc
Southwire Company
Calculate and wire size
Calculate for a specific conductor run or determine wire size based on and current carrying capacity. Limits wire size to and NEC ampacity. Supports AWG and KCMIL sizes only.
Apps Like WireStix Sizing Calculator for iPhone and iPad
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Mike Holt's Electrical Toolbox
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Size conductors, calculate voltage drop, select circuit
Provides conductor sizing calculations, circuit protection sizing, raceway sizing, and equipment grounding conductor sizing for heating and air-conditioning equipment.
SIMpull 600V Calculator
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Calculate wire pull characteristics and generate NEC®
The includes multiple calculators for electrical wire pull calculations. Users can input parameters for voltage drop, ground wire sizing, ampacity adjustments, and phase wire attributes. Results are generated according to NEC® standards.
Electric Toolkit - Calculator
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Wire diagrams, pinouts, calculate electricity
Access electrical wiring diagrams for switches, fans, and outlets. Calculate grounding conductor sizes. View diagrams for 3-way switches, 4-way switching, GFCI, and more. Includes NEC 2014 to NEC 2023 standards.
Ohms Law Calc.
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Calculate voltage, current, and resistance
Calculate electrical values using formulas for voltage, current, resistance, power, and more. Determine wire size and voltage drop. Perform transformer and generator calculations. Convert between electrical units.
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Calculate voltage, current, and resistance
Calculate values using resistor color codes, voltage, current, and resistance formulas. Perform impedance and RLC circuit analysis. Input values to get accurate results for engineering, wiring, and circuit design tasks.
Electrical Calculator
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Calculate values instantly
Provides tools for and electronics calculations. Users can compute resistance, voltage, current, and power. Includes resistor color code conversion and voltage drop calculations aligned with NEC/IEEE standards. Supports USCS and SI units.
ElectriCalc Pro
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Calculate and document electrical work safely
Perform electrical calculations for contractors, designers, and electricians. Calculate load, voltage drop, conduit fill, and panel sizing. Verify compliance with NEC® codes from 1996 to 2023. Store and retrieve past calculations.
Ductulator - Duct Sizing
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Size ducts by friction rate or velocity
Calculate sizes for rectangular and circular ducts by inputting maximum friction rate or velocity. Switch between calculation methods by tapping values. Convert between I-P and S-I units using a toggle switch. Export results for reference.
PV Calculator - off grid
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Size solar systems with precise calculations
Calculate solar system requirements by inputting power consumption and daily sun hours. Size solar panels, battery bank, and charge controller based on energy needs and sunlight availability.
Electrical Calc Elite
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Calculate loads and circuits
Calculate loads, voltage drops, and conductor sizes according to NEC codes. Verify compliance for residential and commercial projects. Access code references for 2002–2023 editions. Perform wire sizing, panel scheduling, and circuit calculations.
Electrical Toolkit by HCP
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Calculate conduit bends and offsets
Calculate conduit bends with offset and 90-degree tools. Determine stub-ups, kicks, and compound angles. Create three and four-point saddles for obstacle navigation. Access NEC-compliant calculations and field-tested utilities for work.
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Calculate BTU, convert units, compare systems, estimate
Calculate BTU/h capacity and determine recommended equipment types. Convert between BTU, kW, Kcal, and Tons. Check current price estimates and compare inverter versus conventional energy consumption. Unlock advanced features through in- purchases.
WinFab - Sheet Metal Ductulator
pasquale dipaola
Calculate duct sizes and dimensions
Calculate duct sizes based on airflow requirements and space constraints. Input dimensions and airflow rates. Generate reports with material estimates and installation guidelines. Export data for sharing or record-keeping.
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