In a small kitchen, the right microwave is the one that fits and still holds a dinner plate. That is harder than it sounds, because a roomy cavity can hide in a surprisingly large body. This guide shows you what to measure, why external dimensions matter more than litres, and which compact models genuinely save space.
| Model | Price | Type | Capacity | Microwave power | Rating | Link | |
|---|---|---|---|---|---|---|---|
 | ★ Top pick Panasonic NN-DF386BBPQ 3-in-1 Combination Microwave | £189.99 | 3-in-1: microwave, grill, convection oven | 23 litres | 1,000 W | ★ 4.5 | View → |
 | Samsung MS23K3513AK 23L Solo Microwave | £89.00 | Solo (microwave only) | 23 litres | 800 W | ★ 4.4 | View → |
 | Russell Hobbs RHM2076B 20L Solo Microwave | £63.50 | Solo (microwave only) | 20 litres | 800 W | ★ 4.2 | View → |
 | Bosch Serie 4 FFL023MS2B 20L Solo Microwave | £139.99 | Solo (microwave only) | 20 litres | 800 W | ★ 4.3 | View → |
 | Panasonic NN-E27JWMBPQ 20L Compact Solo Microwave | £99.00 | Solo (microwave only) | 20 litres | 800 W | ★ 4.4 | View → |
 | Sharp YC-MG81U-S 28L Microwave with Grill | £119.00 | Microwave + grill | 28 litres | 900 W | ★ 4.1 | View → |
£189.99
3-in-1: microwave, grill, convection oven · 23 litres · 1,000 W
£89.00
Solo (microwave only) · 23 litres · 800 W
£63.50
Solo (microwave only) · 20 litres · 800 W
£139.99
Solo (microwave only) · 20 litres · 800 W
£99.00
Solo (microwave only) · 20 litres · 800 W
£119.00
Microwave + grill · 28 litres · 900 W
Before you look at a single model, get a tape measure out, because the most common small-kitchen mistake is buying on the litre rating and discovering the microwave is too deep or too tall for the gap. Measure three things. First, the width of the worktop space, leaving a few centimetres either side for airflow. Second, the depth, remembering the microwave must not overhang the front edge or hit the wall at the back, and that some need rear clearance for the vents. Third, the height, which matters most if the microwave sits under a wall cabinet, where there must also be room for the door to open and steam to escape.
Write those three numbers down and treat them as hard limits. A microwave that is two centimetres too deep is no use however good it is, and returning a heavy appliance is a chore. With your measurements in hand, you can compare against the external dimensions of any model and rule out the ones that will not fit before you fall for them.
This is the single most important thing to understand when buying for a small space. The litre figure describes the cavity, the usable space inside, not the external body. Two microwaves with the same 20-litre cavity can have noticeably different footprints, because some designs are far more efficient with their casing than others. A poorly packaged 20-litre model can take up as much worktop as a well-designed 23-litre one.
So in a small kitchen you are really looking for the best ratio of usable cavity to external size. You want enough room inside to fit a dinner plate, which generally means at least a 17 to 20 litre cavity, in the smallest possible body. Dropping below 17 litres to save space usually backfires, because the cavity becomes too cramped for everyday plates and dishes, leaving you no better off. The sweet spot for most small kitchens is a compact 20-litre solo.
Our pick for a small kitchen is the Panasonic NN-E27JWMBPQ. It is the standout example of a usable 20-litre cavity in one of the smaller bodies in its class, so it sits comfortably on a tight worktop or under a wall cabinet where bigger units will not fit. It is also light enough to move or store easily, with simple controls and Panasonic's everyday reliability, which makes it ideal for a flat, a galley kitchen, an annexe or a caravan.
If budget is the priority, the Russell Hobbs RHM2076B is another compact 20-litre solo at a lower price, with the same everyday cooking power and a smaller worktop footprint than the 23-litre all-rounders. Both are solo microwaves, which suits small kitchens well: a grill or combination model is larger and rarely worth the extra space when worktop room is your main constraint. If you genuinely need browning and can find the room, see our type guide first.
For a tight kitchen, the compact Panasonic NN-E27JWMBPQ is our pick: it fits a usable 20-litre cavity into one of the smaller bodies in its class, with simple controls and reliable performance. The 20-litre Russell Hobbs RHM2076B is a cheaper compact alternative if budget is the priority.
The smallest useful microwaves have around a 17-litre cavity, which suits a single person and the tightest worktops. Below that, a microwave struggles to fit a standard plate. For most small kitchens a compact 20-litre model is the better balance of footprint and usable space.
Measure the worktop depth and the gap under any wall cabinet, then compare against the external dimensions, not just the litre rating, as a roomy cavity can sit in a large body. Leave clearance around the vents for airflow, and check the door can open fully. A compact 20-litre solo usually fits where bigger models will not.
Measure your worktop's width, depth and height first and treat them as hard limits, then look for the most usable cavity in the smallest body, which for most small kitchens means a compact 20-litre solo. Our pick is the Panasonic NN-E27, with the Russell Hobbs RHM2076 as the budget alternative. Avoid dropping below 17 litres, since the cavity becomes too cramped to be useful, and judge models on their external dimensions rather than the litre figure alone. For the wider picture on power and features, read our buying guide and our wattage guide.