Whirlpool WMCS3018RB Countertop Microwave 0.7 Cu Ft
- Capacity: 0.7 cu ft
- Wattage: 700 watts
- Installation Type: Countertop
- Control Type: Push Button
Last refreshed Jun 13, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
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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ASIN: B0FM5KH112Model: WMCS3018RBCategory: Countertop Microwave Ovens
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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.
Pros and cons
- 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 ftlower than 77% of 94 countertop microwave ovens |
| Power & efficiency | |
| Wattage | 700 wattslower than 81% of 79 countertop microwave ovens |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Installation Type | Countertop |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Control Type | Push Button |
| Recommended Uses For Product | Residential |
| Additional Features | Self-Cleaning |
| Item Type Name | Microwave |
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Frequently asked questions
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.