Microwave Size Guide: How Many Litres Do You Need?

Last updated: 2026-09-04

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The right microwave size comes down to two questions: how many people are you heating food for daily, and how much counter space do you actually have? The quick rule: 20L to 23L for one or two people, 25L for a small family (the most popular size in Egypt), and 36L to 42L for a big household or anyone who reheats full trays regularly. For a practical example in the large-capacity tier, the LG MH8265DIS at 42L (≈ 10,520 EGP) is our top pick in the best microwave in Egypt.

The quick answer

Pick your microwave’s capacity by household size first, then by counter space. One or two people: 20L to 23L, priced from roughly 3,800 EGP. Small family (3 to 4 people): 25L is the most popular size. Big household or frequent gatherings: 36L to 42L. And remember that a bigger capacity means a bigger unit outside, not just more room inside.

Key takeaways

• 20L is enough for one or two people and normal-sized plates, and it’s the cheapest tier in the Egyptian market.
• 25L is the most popular size for a small family, taking a wider dish and more food without needing two separate runs.
• 36L to 42L suits a big household and anyone reheating full trays or large batches of rice and chicken for gatherings.
• Capacity is measured in litres, the standard unit of volume (litre definition from NIST), and the printed number is the internal heating cavity’s volume.
• A bigger capacity means a bigger unit outside too, so measure your shelf space before you commit, since that’s the detail most buyers forget.

Work out your size by household headcount

This table sums up the right size for each household size, based on what’s actually available in the Egyptian market:

These ranges are approximate and change, and you can find specific model prices kept current on our microwave prices in Egypt page.

What does the printed capacity actually mean?

The number you see on a microwave’s box (20L, 25L, and so on) is the volume of the internal heating cavity, measured in litres, the standard unit of volume used worldwide for liquids and appliance interior spaces (litre definition from NIST). That capacity is set by the cavity’s inner dimensions: length, width, and height, and it isn’t always directly tied to the unit’s outer size, but in practice a bigger capacity almost always means a physically bigger appliance.

Another important point: bigger capacities usually come with higher wattage, because a larger cavity needs more power to heat evenly. So if you’re going for 36L or more, look for 1,000W or higher, not 700W.

Don’t forget the counter space

The most common mistake when buying a microwave: focusing on the capacity inside and forgetting the size outside. A 42L unit is noticeably bigger than a 20L unit in every direction: width, depth, and height. If your shelf is narrow or sits under a low overhead cabinet, a large unit can genuinely be a problem.

Before you commit to a capacity, measure your available space in centimeters, and leave ventilation clearance around the unit, especially above and behind it. If space is genuinely tight, it’s sometimes smarter to pick a size a notch below your theoretical need and make up for it with an extra reheating run, rather than buying a unit that won’t even fit.

Who actually needs 36L to 42L?

A big capacity isn’t a luxury for everyone, it’s a real need for a specific group: households of 5 or more people, anyone who hosts gatherings regularly, or anyone who wants to reheat a whole tray of chicken or a large batch of rice in one go instead of splitting it into runs. If that describes you, the big capacity saves you real time every week.

If your daily use is simpler than that (a mug of milk, a plate of pasta, reheating a ready meal), a big capacity will sit mostly unused most of the time, and you’ll be paying extra money for size and shelf space you don’t really need.

The practical pick for the large-capacity tier

If you’ve decided you need the big capacity, the LG MH8265DIS at 42L and 1,200W with Smart Inverter tech is our top pick in this tier, plus a built-in grill that browns the top too. Its approximate price is ≈ 10,520 EGP, and it’s the most-reviewed model among our picks with over 715 ratings, which backs up that the overall experience is positive at scale. We didn’t recommend it for being the cheapest in its class, we recommended it because the balance of big capacity, power, and trust makes sense, and it tops our guide to the best microwave in Egypt.

See the LG MH8265DIS price on Amazon ↗

Pick your size in a minute

1. Work out how many people you reheat food for daily: one or two, a small family, or a big household.
2. Match that number to the table above: 20L to 23L, 25L, or 36L to 42L.
3. Measure your available shelf space in centimeters before you commit, and leave ventilation clearance.
4. Check current prices for the size you’ve picked on our microwave prices in Egypt page.
5. If you’re also torn between solo and grill, read solo vs grill microwave before you finalize your choice.

Bottom line

The right microwave size comes down to your household headcount first: 20L to 23L for one or two people, 25L for a small family and the most popular size, and 36L to 42L for a big household or frequent gatherings. And whatever capacity you pick, measure your shelf space first, since a bigger unit inside is bigger outside too. If you genuinely need the big capacity, the LG MH8265DIS at 42L is our top pick. To learn about every other spec beyond size, read our guide on how to choose a microwave, and if you have questions about safety, see is microwave food safe?. To browse all the options, visit our microwaves section.

Sources

• US FDA, “Microwave ovens”, background on how a microwave works and its internal heating cavity: https://www.fda.gov/radiation-emitting-products/resources-you-radiation-emitting-products/microwave-ovens
• NIST, “SI units of volume”, definition of the litre unit used to measure appliance capacity: https://www.nist.gov/pml/owm/si-units-volume

This analysis is based on published information from US FDA (Microwave ovens), NIST (SI units of volume).

Written by Mohab Mohamed Hussein