Is 700 Watt Microwave Enough? | Real-World Limits

For the full breakdown, see our best 700 Watt Microwave guide.

Wondering whether a 700 watt microwave is enough comes down to how you cook. For reheating coffee, softening butter, or defrosting ingredients, it works fine. For cooking dense foods or full meals, you’ll notice the difference. Most package directions and recipes assume wattage in the 1,000 range, so a 700W unit needs time adjustments nearly every time you use it.

What 700 Watts Handles Well

A 700 watt microwave sits solidly in the compact, light-use category. Consumer Reports places these models as suited for reheating and simple tasks rather than family-sized cooking.

Tasks a 700W microwave handles comfortably include:

• Reheating leftovers and beverages
• Defrosting meat and frozen ingredients
• Melting butter, chocolate, or cheese
• Cooking small portions of vegetables or oatmeal

For these jobs, the slower heating rarely matters. You stir once, and the food comes out fine.

Where 700 Watts Falls Short

Dense foods, dinner plates, and frozen entrées expose the limitations of a 700 watt microwave. Lower wattage means the magnetron produces less microwave energy, so food heats more slowly and less evenly throughout.

Frozen dinners provide the clearest example. Package directions typically assume 1,100 watts or higher. Follow the printed time on a 700W unit and the center stays cold while the edges overcook. The Maytag guide to microwave wattages notes that most recipes assume roughly 1,000 watts, which leaves 700W users constantly adjusting.

Food safety hinges on reaching a safe internal temperature. Lower wattage doesn’t reduce that requirement; undercooked cold spots are a real risk when cooking times aren’t extended properly.

How Much Longer Does A 700 Watt Microwave Take?

You can estimate adjusted cook time with a simple formula: new time = old time × recipe watts ÷ your watts. For a recipe written for 1,100 watts, a 700 watt microwave takes about 1.57 times as long. That turns a 5-minute dish into nearly 8 minutes.

Consumer Reports describes the performance gap this way: higher-wattage models cook faster and more evenly, and recommended full-size units typically run from 1,050 to 1,250 watts.

If you don’t know your microwave’s wattage, a simple water test gives a ballpark figure:

The power level setting matters too. Running a 700W microwave at full power already produces slower results; dropping to medium power extends cook times further, so reserve lower settings for defrosting and delicate tasks.

Is 700 Watts Right For You?

Choose a 700 watt microwave when counter space is tight, you heat mostly small portions, and you reheat more than you cook from scratch. Dorm rooms, offices, and small apartments suit this size well.

Step up to a 900W or higher model when you cook frozen meals regularly, reheat full dinner plates, or want results closer to what recipes expect. For weekly meal prep, cooking vegetables in bulk, or warming dense casseroles, the higher wattage saves time and produces more even results.

Energy use stays modest either way. The Department of Energy’s appliance standards program notes that microwave ovens typically draw less power than full ovens, and the difference between 700W and 1,000W units is small on a monthly electric bill. If you own a 700 watt microwave and cook dense foods often, try increasing cook times by 50% and stirring at the halfway point before upgrading.