TOOL-001
Ohm’s Law Calculator
Solve for a missing DC voltage, current, or resistance and view power and formulas.
Open calculator →PowerEngineerLab · Published tools
Electrical and energy calculators.
Choose a published calculator with a visible method, inputs, and applicability boundary.
TOOL-002
Series and Parallel Resistance Calculator
Find the equivalent resistance of ideal series and parallel resistor networks.
Open calculator →TOOL-003
Voltage Divider Calculator
Compare loaded and unloaded output voltage, current, and equivalent lower resistance.
Open calculator →TOOL-004
AC Power Calculator
Calculate real, apparent, reactive power, and line current for single-phase or balanced three-phase systems.
Open calculator →TOOL-005
Power Triangle Calculator
Calculate apparent power, power factor, and phase angle from real and signed reactive power.
Open calculator →TOOL-006
Power Factor Correction Calculator
Estimate reactive compensation and capacitance per branch for a lagging load.
Open calculator →TOOL-007
Conductor Resistance Calculator
Estimate single-conductor resistance from length, area, resistivity, and temperature.
Open calculator →TOOL-008
Capacitive Reactance Calculator
Calculate the magnitude of ideal capacitive reactance from frequency and capacitance.
Open calculator →TOOL-009
Inductive Reactance Calculator
Calculate the magnitude of ideal inductive reactance from frequency and inductance.
Open calculator →TOOL-010
RC Time Constant Calculator
Calculate the ideal RC time constant and capacitor voltage at a chosen time.
Open calculator →TOOL-011
Appliance Electricity Cost Calculator
Estimate energy use and cost from power, operating time, load factor, and your tariff.
Open calculator →TOOL-012
Home Energy Use Calculator
Compare device energy use, share, and estimated cost in one home energy budget.
Open calculator →TOOL-013
Energy Cost Comparison Calculator
Compare undiscounted or discounted lifecycle energy costs for multiple scenarios.
Open calculator →TOOL-014
Lighting Energy Savings Calculator
Compare annual energy, cost savings, and simple payback for a lighting replacement.
Open calculator →TOOL-015
Appliance Replacement Payback Calculator
Estimate annual savings and simple payback when replacing an appliance.
Open calculator →TOOL-016
Battery Runtime Calculator
Estimate battery runtime from usable energy, efficiency, and constant load.
Open calculator →TOOL-017
Battery Charging Time Calculator
Estimate charging time from capacity, state of charge, current, efficiency and taper factor.
Open calculator →TOOL-018
UPS Sizing and Runtime Calculator
Size UPS active and apparent power and estimate battery runtime.
Open calculator →TOOL-019
Voltage Drop and Cable Sizing Calculator
Compare conductor inputs, voltage drop, line loss, and lifecycle cost candidates.
Open calculator →TOOL-020
Solar Energy and Payback Calculator
Estimate solar generation, cash flow, and simple or discounted payback.
Open calculator →BACKLOG-001
EV Charging Time, Cost and Range Calculator
Estimate charging time, grid energy, cost, range and simple trip feasibility.
Open calculator →BACKLOG-002
Generator Capacity and Starting Load Calculator
Analyze running loads, starting peaks and recommended generator rating.
Open calculator →BACKLOG-003
Transformer Capacity, Loading and Losses Calculator
Estimate apparent power, load factor, losses and annual loss cost.
Open calculator →BACKLOG-004
Three-Phase Motor Current and Starting Analysis
Estimate rated current, starting current and suggested capacity.
Open calculator →BACKLOG-005
HVAC Operating Cost Comparison
Compare annual electricity use and cost for air-conditioning and heat-pump options.
Open calculator →BACKLOG-006
Data Center and Server Energy & UPS Planner
Estimate facility energy, cost and basic UPS input and runtime.
Open calculator →BACKLOG-007
Pump Energy and Variable-Speed Retrofit Analysis
Estimate hydraulic power, annual energy, cost and savings.
Open calculator →BACKLOG-008
Fan System Energy Analysis
Estimate aerodynamic power, annual energy, cost and savings.
Open calculator →BACKLOG-009
Compressed Air Leak and Savings Calculator
Estimate wasted compressor power, annual cost and repair savings.
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