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Estimate how long a portable power station can run a device based on battery capacity, device wattage, inverter efficiency, and allowed depth of discharge.

Convert generator rotational speed in RPM to electrical output frequency in hertz based on the number of magnetic poles and optional slip adjustment. This calculator helps estimate alternator frequency for common 2-pole, 4-pole, 6-pole, and 8-pole generator configurations.

Estimate the recommended portable power station capacity based on your daily energy use, desired backup duration, inverter efficiency, and depth of discharge.

Estimate the recommended battery generator capacity in watt-hours based on your device load, runtime needs, surge power, battery reserve, and inverter efficiency.

Estimate the recommended continuous running load for an inverter generator based on generator size, intended load type, altitude derating, ambient temperature, and a safety reserve for startup surges and efficient operation.

Estimate inverter generator electrical efficiency as the percentage of fuel energy converted into usable AC output based on power output, runtime, fuel use, and fuel type.

Estimate how long an inverter generator can run based on fuel tank size, fuel level, load, and efficiency mode. The calculator estimates runtime by converting available fuel into usable watt-hours and dividing by the connected electrical load.

Estimate the recommended inverter generator running watt capacity based on the total running load, highest starting surge, desired reserve capacity, and altitude derating.

Calculate the synchronous speed of an AC generator based on supply frequency and number of poles. Includes an optional slip input to estimate actual rotor speed for comparison.

Calculate the synchronous rotational speed of an AC generator based on electrical frequency and number of poles, with optional outputs for rotor speed ratio and pole pairs.

Calculate generator output frequency based on engine speed, alternator poles, drive ratio, and slip factor. Useful for estimating whether a generator setup will produce the target AC frequency such as 50 Hz or 60 Hz.

Estimate the total running wattage needed from a generator based on the number of appliances, average running watts per appliance, continuous load margin, and power factor adjustment.

Estimate generator phase load balance as the percentage deviation between the highest-loaded phase and the average phase load, using three phase loads and generator rated capacity.

Estimate the percent load balance across a three-phase generator by comparing the highest and average phase loads, with an adjustment for power factor and operating reserve.

Calculate how much a generator is overloaded or underloaded based on its rated capacity, actual connected load, power factor, and a demand factor.

Estimate generator capacity headroom based on total running load, expected peak surge load, desired reserve margin, and altitude derating. The result shows the recommended generator size needed to maintain adequate headroom under operating conditions.

Estimate the total generator demand load in watts by combining running wattage of connected devices, startup surge allowance, desired safety margin, and power factor adjustment.

Estimate the total simultaneous running load a generator must support by summing the wattage of connected loads and applying a startup surge factor plus a safety margin.

Estimate the minimum generator size needed for a continuous electrical load, accounting for power factor, surge margin, and recommended maximum generator loading.

Estimate the generator size needed to handle peak electrical demand by combining running load, motor starting surge, demand margin, and power factor.

Estimate the generator starting wattage needed for motor-driven equipment by combining running watts, motor starting surge, quantity, and a safety margin.

Convert generator wattage to current in amps based on voltage, phase, and power factor. Useful for estimating running amperage for portable and standby generators.

Estimate the generator surge wattage needed to start electrical loads by combining total running watts, the largest motor startup multiplier, and safety headroom. Use this to size a generator that can handle startup surges without overloading.

Calculate estimated generator output current in amps based on generator power, voltage, phase, power factor, and efficiency.

Calculate generator output voltage based on power, current, phase type, and power factor. This calculator uses standard electrical relationships for single-phase and three-phase generators.

Calculate estimated three-phase generator real power output from line voltage, line current, power factor, and efficiency. The calculator uses the standard three-phase power relationship and applies efficiency to estimate usable output power.

Calculate the line current of a three-phase generator based on generator apparent power, line-to-line voltage, power factor, and efficiency. Supports input in kVA and returns estimated output current in amperes.

Calculate the output current of a single-phase generator from power, voltage, power factor, and efficiency. Useful for estimating running current based on real-world generator and load conditions.

Calculate recommended generator wattage from voltage, current, phase type, power factor, and surge margin. This helps estimate the generator size needed to safely run electrical loads, including startup headroom.

Calculate estimated generator wattage from electrical current, voltage, phase type, and power factor. This helps size a generator by converting amps to running watts for single-phase or three-phase loads.