Inverter Load Calculator
Calculate total load on your inverter and check if your inverter capacity is sufficient for all connected appliances.
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Result
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Formula
Adds up the wattage of all devices you want to run on the inverter and compares it to the inverter VA capacity (accounting for power factor).
Worked Example
Frequently Asked Questions
What is the difference between VA and Watts?
VA (Volt-Amperes) is apparent power; Watts is real power. The ratio between them is the Power Factor. A 1000VA inverter at 0.8 PF can deliver 800W of real power.
What is a safe load percentage?
Do not load an inverter beyond 80% of its rated capacity for sustained use. Brief surges (like motor startup) can draw more temporarily.
What power factor should I use?
Most home inverters have a power factor of 0.7 to 0.8. Check your inverter specifications for the exact value.
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