Best overall
Honda EU2200i
2,200W start · 1,800W run
Gasoline · Inverter · 48–57 dBA · 47 lb
The benchmark quiet inverter — legendary engine reliability and clean power (<3% THD) for sensitive electronics.
Find on AmazonWhat size generator to run a microwave (1000w)?
Short answer
A microwave (1000w) draws about 1,000 watts and has no motor surge, so a generator rated for at least 1,000 watts can run one on its own — a 2,000W unit gives comfortable headroom for anything else you add.
Running watts
1,000W
Starting watts
1,000W
Minimum generator
1,000W
Recommended
2,000W
Sizing a generator for a microwave (1000w)
A microwave (1000w) is a resistive load with no motor, so its starting and running watts are the same — about 1,000 watts. You only need to cover that steady draw, plus headroom for anything else on the generator.
To run one on its own, choose a generator rated for at least 1,000 starting watts. To run it alongside other essentials, add up everything you need and size up — the calculator below does that math for your exact list.
Run your full appliance list
This page covers the microwave (1000w) on its own. Open the calculator with it pre-selected, then add everything else you plan to power at the same time.
Size a generator with a microwave (1000w)Recommended recreational / portable generators
Real, widely available units in the Up to 3,500W class. Independent picks — we're not affiliated with any manufacturer or retailer and earn nothing from these links.
Best value
Westinghouse iGen2200
2,200W start · 1,800W run
Gasoline · Inverter · 52 dBA · excellent fuel economy
Matches the Honda’s 1,800W running output for a fraction of the price, and sips even less fuel.
Find on AmazonBudget pick
Champion 2500W Dual Fuel Inverter (201183)
2,500W start · 1,850W run
Dual fuel (gas / propane) · Inverter · CO Shield auto-shutoff · ultralight
Runs on gasoline or propane and includes a built-in carbon monoxide shutoff sensor.
Find on AmazonFrequently asked questions
What size generator do I need to run a microwave (1000w)?
To run a microwave (1000w) on its own you need a generator rated for at least 1,000 starting watts. We recommend a 2,000W (recreational / portable) unit so you have headroom to add other appliances without running the generator at its limit.
How many watts does a microwave (1000w) use?
A microwave (1000w) uses about 1,000 watts. It has no motor, so its starting and running watts are the same. Always check your unit's nameplate for exact figures.