Electrician Tools

Amps to Watts Calculator

Convert electrical current in amps to power in watts using voltage and, where ap

Arc-Flash Incident Energy Calculator

Estimate incident energy and the working-distance flash-hazard boundary for a lo

Battery Bank Sizing Calculator (Inverter Systems)

Size an off-grid or backup battery bank from load, runtime and autonomy days, ap

Cable Length Calculator (Max Run)

Find the maximum one-way cable length for a given wire size, current, voltage an

Cable Tray Fill Calculator

Check cable tray fill: enter tray width, height and type, then your cable diamet

Capacitance Calculator (Series / Parallel)

Total up to eight capacitors in series or parallel with mixed units, and get sto

Circuit Breaker Size Calculator

Suggest a preliminary breaker rating from load current, conductor ampacity, cont

Conduit Fill Calculator

Calculate conduit fill for EMT, PVC, IMC and RMC. Enter the trade size and your

Copper vs Aluminum Wire Size Converter

Convert a copper wire size to the aluminum size with equal capacity, and vice ve

Demand Load Calculator

Convert connected loads into estimated demand load using configurable demand and

Electrical Estimate / Quote Generator (Materials + Labor)

Build a full electrical quote from material lines, labor at two rates, equipment

Electrical Load Calculator (Commercial)

Calculate estimated electrical demand for offices, shops, restaurants, warehouse

Electrical Load Calculator (Residential)

Estimate the total electrical load of a home by combining lighting, fans, applia

Electrician Labor Cost / Job Pricing Calculator

Price an electrical job from crew size, hours and travel, applying a skill multi

Energy Consumption Calculator (kWh & Cost Estimator)

Work out the energy an appliance uses and what it costs to run, including standb

Frequency / Wavelength Calculator

Convert between frequency and wavelength for light, sound or any custom velocity

Fuse Size Calculator

Suggest a standard fuse rating from the load current, continuous-load portion an

Generator Sizing Calculator

Estimate the generator capacity required for your loads, accounting for running

GFCI / RCD Trip-Time Reference Tool

Look up standard GFCI/RCD ratings (10, 30, 100, 300 mA), their trip thresholds a

Ground-Fault Calculator

Estimate the ground-fault current and touch voltage for a line-to-earth fault, c

Grounding Conductor Size Calculator

Estimate the minimum grounding/earthing conductor size from the phase conductor,

Impedance Calculator (RL, RC, RLC)

Calculate inductive and capacitive reactance, total impedance, phase angle and p

Inverter Sizing Calculator

Size an inverter from running and surge loads across several appliances, applyin

kVA to kW Calculator

Convert apparent power in kilovolt-amps to real power in kilowatts at your chose

kW to kVA Calculator

Convert real power in kilowatts to the apparent power in kilovolt-amps the suppl

LED Savings Calculator (vs Incandescent / CFL)

Compare existing lamps against LED replacements across a whole installation: ann

Light Fixture Load Calculator

Total a lighting circuit from fixture wattage and quantity, add driver losses, a

Lighting Layout / Spacing Calculator (Lux Level per Room)

Apply the lumen method to size and lay out lighting: fixture count, a suggested

Lumens to Watts Calculator

Convert a target lumen output into the wattage each lighting technology needs, o

Metric to AWG Wire Converter

Convert wire cross-section between square millimetres (mm2) and American Wire Ga

Motor FLA Calculator

Compute the full-load current (FLA) of an electric motor from kW or horsepower,

Motor Starting Current Calculator

Estimate the current a motor draws during startup from FLA or kW, starting metho

NEC / IEC Code Reference Lookup

Quick reference to the most-used NEC articles and IEC clauses for sizing, protec

Ohm's Law Calculator (V, I, R, P Solver)

Enter any two of voltage, current, resistance and power and solve the other two.

Panel Load Calculator (Service Panel Capacity)

Calculate the connected and estimated demand load of an electrical panel, compar

Power Factor Calculator

Find the power factor from kW and kVA, or from voltage, current and power. Calcu

Resistor Color Code Calculator / Decoder

Decode 4, 5 and 6 band resistor color codes into resistance, tolerance and tempe

Series / Parallel Resistance Calculator

Total up to eight resistors in series or parallel, see both equivalents at once,

Service Call Pricing Calculator

Build a call-out price from trip charge and mileage, diagnostic and repair time

Short-Circuit Current Calculator

Estimate the prospective short-circuit current at the source and at a feeder poi

Single-Phase to Three-Phase Load Calculator

Convert a single-phase load connected to a three-phase supply into its equivalen

Solar Panel Wire Sizing Calculator

Size PV array cable from string current, system voltage and run length. Applies

Three-Phase Power Calculator

Compute real power (kW), apparent power (kVA), reactive power (kVAr) and power f

Transformer Sizing Calculator

Estimate the kVA rating for a transformer from connected load, demand factor, po

Voltage Drop Calculator

Calculate voltage drop in volts and percent for a known wire size, current, leng

Watts to Amps Calculator

Determine the current in amps required for a given electrical power and voltage.

Wire Ampacity Calculator (NEC / IEC)

Calculate allowable ampacity for a wire using NEC 310.16 or IEC tables, with amb

Wire Gauge (AWG) Calculator

Find the right AWG wire size from conductor diameter, cross-sectional area, or r

Wire Resistance Calculator

Calculate the DC resistance of a wire from material, length and cross-section, w

Wire Size Calculator (Amps + Distance)

Find the correct wire size for a load based on amperage, one-way distance, volta