Free calculators for sizing, converting and costing generator sets. No sign-up needed — every tool has its own page.
Pick your appliances and get the running load, starting surge and recommended generator size in kW and kVA.
Convert between real power (kW) and apparent power (kVA) using the power factor, with the equivalent current at 400 V and 230 V.
Convert a current reading into kVA, kW and horsepower for single-phase or three-phase supplies.
Estimate hourly and total fuel use, consumption per kWh, and the running cost of a diesel or gasoline generator.
Check how much voltage is lost along a cable run before it reaches the load, in volts and as a percentage.
Find the minimum cable cross-section for your current, voltage and run length at an acceptable voltage drop.
Work out how much current a generator or transformer of a given kVA will deliver at your supply voltage.
Estimate fuel, maintenance and cost per kWh to judge whether a generator is competitive for daily use.
Sizing a generator by guesswork is expensive either way: an oversized set burns more fuel than necessary and costs more up front, while an undersized set trips out the moment a motor starts. These tools use the same formulas our engineers apply when preparing a quotation — power factor, starting surge, voltage drop and fuel consumption included.
Tell us what you need to power and we will confirm the exact model, voltage and configuration.
