Is a combination microwave with a grill and oven worth it?

What combination actually adds over a solo microwave, the households where it earns its money, and the compromises that come with putting three appliances in one box.

Difficulty: beginner
Time: 25 min
Read: 4 min

Short answer

Worth it if you have one oven and regularly need a second, or if kitchen space means one appliance must do several jobs. Not worth it if you mainly reheat — a solo microwave does that identically for a third of the price, with a simpler control panel and a machine that is cheaper to replace.

A combination microwave is three appliances sharing a cavity: a microwave, a grill element and a convection fan oven. Used well it genuinely replaces a second oven in a small kitchen. Used as most people use a microwave, it is an expensive way to reheat leftovers behind a more complicated set of controls.

Step by step

Be clear about the three modes and what each does.Microwave alone: reheating and microwave cooking. Grill: a top element for browning and finishing. Convection: a genuine small fan oven that bakes and roasts. Combination modes run microwave plus grill or microwave plus convection together, which is what makes it fast.
Understand why the combination modes are the point.Microwave energy heats the inside of the food fast; the convection or grill browns the outside. Running both cooks a jacket potato or a chicken portion in a fraction of the oven time with a real crust, which neither mode alone achieves.
Test it against your actual week.If you have one oven and it is regularly full, or you cook for one or two and heating a full oven feels wasteful, a combination unit earns its place several times a week. If the microwave is used for porridge and leftovers, it will never justify the difference.
Check the usable capacity in oven mode.The cavity is small and the turntable takes up part of it. A combination microwave will not take a large roasting tin, and the accessories it comes with — a low rack, a high rack, a crisper plate — are what define what it can actually do.
Look at the cleaning burden honestly.In convection and grill mode you get baked-on splatter in a cavity that also has to stay microwave-clean, and the waveguide cover is right there. It is a more demanding appliance to keep clean than a solo microwave.
Read the metal rules for your specific model.Combination microwaves are supplied with metal racks that are safe in the modes the manual specifies and not in others. Leaving a metal rack in during a microwave-only phase is the most common combination-microwave mistake and it arcs immediately.
Compare running cost against the main oven.For a small dish, a combination microwave uses far less energy than heating a full oven, because there is a fraction of the cavity to bring up to temperature and the microwave component does part of the work. That is a genuine and repeated saving in a one-or-two-person household.
Reach a verdict, and consider the middle option.A microwave with a grill but no convection costs a modest step over solo and covers browning, which is most of what people actually want. Full combination is for households that genuinely need a second oven and do not have room for one.

Tips

The crisper or browning plate supplied with many combination models is the accessory that does the most work. Check one is included rather than an extra.
Combination cooking has a learning curve — the timings are unlike either a microwave or an oven. Expect a few disappointing weeks before it becomes useful.
If it is replacing a second oven, check the cavity will take the dish you would have used. Measure a real dish rather than trusting the litre figure.
A built-in combination microwave at eye level in a tall housing is the arrangement that most often justifies the cost, because it genuinely functions as the second oven in the run.

Common mistakes

Leaving a metal rack in during microwave-only cooking — The rack is designed for convection and grill modes. In microwave mode it arcs, which can damage the waveguide cover and the magnetron.
Buying combination and only ever using microwave mode — It is the most common outcome. If you suspect that is you, the money is better spent on a good solo microwave and a better main oven.

Alternatives

Solo microwave: Reheating, defrosting and microwave cooking. Cheapest, simplest controls, and identical performance for the jobs most people actually use a microwave for.
Microwave with grill: Adds a top element for browning and finishing. Small price step, covers most of what people want combination for.
Combination microwave oven: Adds convection so it bakes and roasts, and combines modes for speed with browning. A genuine second oven in a small kitchen.
Air fryer plus a solo microwave: Two appliances doing the two jobs well for a similar total price, at the cost of two pieces of worktop rather than one.

Questions people ask

Can a combination microwave replace an oven entirely?

In a very small kitchen for one or two people, close to it — it roasts, bakes and grills. What it cannot do is capacity: no large roasting tin, no two trays, no whole large bird.

Is it slower than a normal oven in convection mode?

To preheat, no — the cavity is tiny and comes up fast. To cook, it is comparable in pure convection and much faster in a combination mode, because the microwave component is heating the inside at the same time.

Do they break more often?

There is more in them to fail — a magnetron, a fan, an element and a more complex control board. Against that, they are usually built to a higher standard than a budget solo microwave. The practical difference is that a repair is more likely to be worth doing.