Fast field calculators for HVAC, Plumbing & Electrical
electrical calculator workflow
Voltage, current, power, and circuit planning calculators for quick electrical field estimates.
Choose a path based on the circuit question: load conversion, breaker/wire planning, voltage drop, or conduit fit.
Convert the load, check current, then compare circuit assumptions.
After load is known, check voltage drop and conductor direction.
Common starting points for quick planning and assumption checks.
Calculate watts, amps, or volts by entering any two known electrical values for fast field checks and planning estimates...
Open calculatorEstimate voltage drop across conductor runs for early branch and feeder planning.
Open calculatorEstimate breaker sizing from connected load assumptions and basic continuous-load planning factors.
Open calculatorUse these groups to move from an initial estimate to the next practical check.
Start here for basic load conversions and electrical relationships.
Use these when current, breaker size, and conductor assumptions must be checked together.
Check long-run performance after you know load, conductor, and distance assumptions.
Check whether conductor sets fit raceway planning limits.
Calculate watts, amps, or volts by entering any two known electrical values for fast field checks and planning estimates.
Open calculatorConvert kilowatts to amps for single-phase and three-phase systems with voltage and power factor assumptions.
Open calculatorCompute volts, amps, resistance, and watts from any two known values using standard Ohm's Law relationships.
Open calculatorEstimate voltage drop across conductor runs for early branch and feeder planning.
Open calculatorEstimate breaker sizing from connected load assumptions and basic continuous-load planning factors.
Open calculatorEstimate conductor size starting points from amperage, run length, and basic installation assumptions.
Open calculatorEstimate operating cost from wattage, runtime, and utility rate for budgeting and upgrade comparisons.
Open calculatorEstimate conduit fill percentage from conduit size and conductor counts for quick layout checks.
Open calculatorElectrical guide
Electrical planning often starts with simple relationships, but it is important to know when those relationships stop being enough.
Electrical guide
Circuit planning works best when load, breaker, conductor, conduit, and voltage-drop checks are treated as connected decisions.
Planning guide
This guide shows a repeatable process for turning fast calculator outputs into better field decisions. It is designed for technicians,...
Electrical
Understand voltage drop with practical field examples and simple ways to reduce risk on long runs.
These calculators support early planning and field checks. Final decisions should account for site conditions, adopted local codes, manufacturer data, and licensed trade review where required.