Commercial Rice Cooker Buying Guide: Sizing by Covers, Not Just Litres
Quick answerAs a rule of thumb, budget roughly 2 standard catering portions per litre of a rice cooker's rated capacity — so a 10L cooker covers ~20 portions and a 23L cooker covers ~45. Because Keloo prices every size in this range the same, there's no cost penalty for buying a size above your average day — only for buying one below your busiest day.
Rice is one of the few kitchen staples where the equipment, not the ingredient, sets your ceiling. Undersize the cooker and you're running a second batch mid-service, holding hungry tables or a lunch queue while it steams; oversize it and you've just spent money on capacity that sits empty. Because rice cookers are rated by tank volume rather than a single fixed output, sizing one is more straightforward than most kitchen equipment — once you know how litres convert to plates.
How rice cooker capacity converts to covers
Commercial rice cookers are rated by their tank's rice + water capacity in litres, not by portions — which is where most first-time buyers misjudge size. As a practical planning figure, a standard catering portion of cooked rice runs 75–100g, and rice roughly doubles in volume once cooked. Using that, each litre of rated cooker capacity works out to approximately 2 portions once you account for the water needed alongside the rice itself.
This is a planning estimate, not a promise — rice variety, desired portion size and how full you actually fill the tank all shift the real number by a portion or two either way. Use it to pick the right size bracket, then confirm with a test batch.
Compare Keloo's rice cooker range
| Model | Capacity | Power | Approx. portions | Price |
|---|---|---|---|---|
| ERC-8L | 8L | 1.3kW | ~16 | £149.99 |
| ERC-10L | 10L | 1.6kW | ~20 | £149.99 |
| ERC-13L | 13L | 2.0kW | ~26 | £149.99 |
| ERC-19L | 19L | 3.0kW | ~38 | £149.99 |
| 23L Professional | 23L | 3.0kW | ~46 | £149.99 |
| ERC-30L | 30L | 3.25kW | ~60 | £149.99 |
| ERC-35L | 35L | 3.5kW | ~70 | £149.99 |
ERC-8L
£149.99
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ERC-13L
£149.99
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23L Professional
£149.99
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ERC-35L
£149.99
View product →All seven sizes list at the same price — see below for why that changes the sizing decision.
Why buying above your average makes sense here
With most catering equipment, more capacity costs more money, so you size to your average day and accept a slower Saturday. Keloo's rice cooker range breaks that trade-off — every size from 8L to 35L is the same price, so the only real cost of buying bigger is a little extra counter space and a slightly higher running wattage. That flips the sizing logic: buy for your busiest realistic service, not your average one, since there's no premium for the headroom.
Keeping quality consistent at volume
- Don't max out the tank every batch. Rice cooks more evenly with a little headroom — running at 90% capacity rather than 100% gives steam room to circulate.
- Fluff and rest before holding. A quick fluff with the paddle a few minutes after cooking finishes prevents compaction during the keep-warm cycle.
- Don't hold indefinitely. Commercial keep-warm functions are built for hours, not a full day — for an evening service, plan a fresh batch rather than holding lunch's rice for six-plus hours.
- Match rinse habits to rice type. Short-grain and sushi rice benefit from a rinse before cooking; pre-steamed or parboiled rice often doesn't need it — check your supplier's guidance.
Frequently asked questions
How long does a commercial rice cooker keep rice warm for?
Most units hold rice at safe serving temperature for several hours on the keep-warm setting, but quality (moisture, texture) is best within the first 2–3 hours — plan batch timing around your service windows rather than one cook for the whole day.
Can I cook less than the rated capacity?
Yes — running below capacity is normal and doesn't damage the unit. It's running consistently at or above rated capacity that shortens element life, which is another reason to size with headroom rather than right at your average need.
Do larger rice cookers need a different power socket?
The 19L and above models draw 3kW+, which is within a standard UK 13A socket's rating (just), but check you're not sharing that circuit with other high-draw equipment — a dedicated circuit is safer for anything at 3kW or above running for extended periods.
Is there a difference in rice quality between the smallest and largest models?
No — all sizes use the same heating and steaming principle, just scaled. Quality comes down to rinse, water ratio and not overfilling, not which size you buy.
Compare the full range
Every Keloo rice cooker ships with a 12-month warranty and UK-based support.
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