Whirlpool WMCS3018RB Countertop Microwave with Turntable 0.7 Cu. Ft
- Countertop Microwave Oven
- 0.7 cu ft
- 700 watts
- Push button
- Better rated than 81%
A quiet, easy-to-operate microwave at a genuinely compact size, suited to light single-person use rather than family-size reheating.
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How it ranks among the 85 countertop microwave ovens we track
4.5★ across 73 Amazon ratings, Bayesian-smoothed toward the category average.
73 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
3,018+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 85 countertop microwave ovens we track - how the scorecard works · full countertop microwave ovens data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jun 13, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Whirlpool WMCS3018RB is a compact 0.7 cubic foot countertop microwave with 700 watts, a steam clean cycle, and four express buttons for quick reheating. It's sized for a single person, a small kitchen, or a secondary spot like an RV rather than a family-size countertop.
At 0.7 cubic feet this is one of the smaller countertop microwaves Whirlpool sells, and buyers who didn't check the capacity before ordering were the ones most likely to find it undersized, one specifically noting a bag of popcorn catching on the interior wall while spinning. The steam clean function uses a bowl of water and heat to loosen splatters, which several buyers highlighted as an easy way to avoid scrubbing. The door has a safety lock behavior where leaving it unlocked after heating causes the unit to resume cooking, a quirk one buyer found inconvenient.
- 0.7 cu ft capacity, 700 watts
- Steam clean cycle
- 4 express buttons plus auto functions
- Dishwasher-safe turntable plate
Who it's for
Fits a single cook, a small kitchen with limited counter space, or a secondary microwave for an RV or bedroom. Not the right size for reheating full dinner plates or larger cookware regularly, since the interior is built for a small plate.
What buyers say
From Amazon customer reviews.
Buyers repeatedly called it quiet, easy to operate, and appropriately sized for a small kitchen or single-person use, with the steam clean and keep-warm settings drawing specific praise. The main complaints were size-related: one buyer wished they'd bought a larger model after a popcorn bag got stuck against the interior wall while spinning, and another found the door's re-lock requirement after heating inconvenient. One reviewer using it as an RV replacement noted it came with an air fry tray and called it a strong fit for that space.
Strengths and trade-offs
Drawn from this product's published specifications.
- Quiet operation noted by multiple buyers
- Steam clean loosens spills without scrubbing
- Express buttons skip manual time entry
- Fits tight counter space or RV use
- 0.7 cubic feet is small for bulkier items like popcorn bags
- Door must be manually unlocked or it resumes cooking
- Sits low, and the door can catch on counter edges
Performance notes
At 700 watts and 0.7 cubic feet, this microwave is built for speed on small portions rather than raw power on large ones, which is consistent with buyers describing it as quick for a cup of coffee or a small plate but tight for anything bulkier. The steam clean cycle works by heating a bowl of water inside to loosen dried spills before you wipe them out, rather than using any chemical cleaner. The door has to be manually unlocked after each heating cycle or the unit will start cooking again, a design detail that trips up buyers expecting it to simply stop and wait.
Specifications
| Brand | Whirlpool |
|---|---|
| Model | WMCS3018RB |
| Dimensions & fit | |
| Item Dimensions D x W x H | 12.4 × 18.3 × 10.5 inches |
| Capacity & performance | |
| Capacity | 0.7 cu ft |
| Power & efficiency | |
| Wattage | 700 watts |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Installation Type | Countertop |
| Included components | |
| Included Components | item |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Control Type | Push button |
| Item Type Name | Microwave |
| Additional Features | Self-Cleaning |
| Recommended Uses For Product | Residential |
Other Whirlpool countertop microwave ovens
How it compares
This product against the closest alternatives we track in countertop microwave ovens.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Whirlpool WMCS3018RB Countertop Microwave with Turntable 0.7 Cu. FtThis product | 4.5 / 5 | 73 | 3.9 / 5 |
| COMFEE' EM720CPL-PMB Countertop Microwave Oven with Sound On/OffCOMFEE' | 4.4 / 5 | 28,000 | 4.4 / 5 |
| Panasonic Microwave Oven NN-SN686S Stainless Steel Countertop/Built-In with Inverter…Panasonic | 4.3 / 5 | 8,400 | 4.4 / 5 |
| Nostalgia RMO4BK Retro 0.9 Cubic Foot 800-Watt Countertop Microwave OvenNostalgia | 4.6 / 5 | 1,200 | 4.4 / 5 |
| TOSHIBA EM131A5C-BS Countertop Microwave Ovens 1.2 Cu FtTOSHIBA | 4.4 / 5 | 32,299 | 4.3 / 5 |
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Questions about the Whirlpool WMCS3018RB
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What size is the Whirlpool WMCS3018RB microwave?
It has a 0.7 cubic foot interior and runs at 700 watts, sized for small portions rather than full dinner plates.
How does the steam clean function work?
You add a bowl of water and run the steam clean cycle, which loosens splatters so you can wipe the interior clean afterward.
Is the turntable dishwasher safe?
Yes, the turntable plate can be removed and washed in the dishwasher.