The Best 18 Inch Portable Dishwasher
Our researched picks for 18 inch portable dishwashers deliver powerful cleaning in a space-saving design. From budget-friendly to feature-rich, find the model that fits your kitchen and lifestyle.
By Salvador Wright
Updated September 10, 2026
We all know the struggle: a sink full of dishes after a meal, and no built-in dishwasher to handle the load.
An 18-inch portable dishwasher can transform that daily chore, especially in apartments, condos, or small kitchens where space is at a premium.
These compact workhorses roll up to your faucet, connect in seconds, and deliver cleaning power that rivals full-size models.
In this guide, we have evaluated the top 18-inch portable dishwashers on the market, scoring each on our 0 to 10 BP Score based on specifications, expert consensus, and verified owner feedback.
Whether you prioritize wash cycles, noise levels, or ease of installation, our picks will help you find the right fit for your home.
EUHOMY Countertop Dishwasher 8 Programs 5L
This portable countertop dishwasher offers eight programs and a dual-spray arm system for thorough cleaning. Its 5L built-in tank or hose connection provides flexibility for apartments, RVs, and dorms, while the hot-air drying and child lock add convenience. Ideal for everyday dishes and baby items, though not for oversized cookware.
Pros
- 8 wash programs including quick and baby care
- Dual spray arms for 360-degree coverage
- Hot-air drying for ready-to-use dishes
- Child lock and delay start for safety and flexibility
- Quiet operation at 40 dB
Cons
- Not suitable for bulky pots or large baking trays
- Plastics and deep containers may retain droplets after drying
- Requires scraping heavy grease before loading
Hermitlux Slim 14.6" Countertop Dishwasher
This ultra-slim countertop dishwasher measures just 14.6 inches wide, making it a fit for tight U-shaped or linear kitchens. It features dual Y-head spray arms for thorough cleaning and a dry tank system that uses waste heat to prevent moisture. With six wash cycles plus a dry function and two water supply modes (tank or faucet), it's a flexible choice for apartments, dorms, or RVs.
Pros
- Ultra-slim 14.6-inch width fits small spaces
- Dual Y-head spray arms for 360-degree cleaning
- Dry tank system prevents moisture buildup
- Holds over 30 pieces of kitchenware
- Saves up to 83% more water than handwashing
Cons
- Plates limited to 10.25 inches diameter
- Requires manual water tank filling if not hooked to faucet
- Drying cycle only available with select wash programs
NOVETE Portable Countertop Dishwasher (5L Tank)
This compact dishwasher fits easily on a countertop and requires no permanent installation, thanks to its dual water supply modes: a built-in 5L tank or a direct faucet connection. It holds up to four place settings and offers five wash cycles, including a baby care mode with 167°F water and a fruit wash cycle, making it a versatile option for small households, dorms, or RVs.
Pros
- No installation needed (tank or faucet)
- Baby care mode with high-temperature wash
- 3-in-1 function: dishwasher, dryer, cabinet
- Compact size fits small kitchens
- Includes fruit basket for produce cleaning
Cons
- Limited capacity for larger households
- Water tank requires manual refilling if not connected to faucet
Midea 18" Built-in Dishwasher (8 Place Settings)
This slimline built-in dishwasher fits into tight spaces like under a sink while still accommodating plates up to 11 inches tall. It offers six wash programs plus heated dry and sanitize functions, making it a compact yet capable option for small kitchens.
Pros
- Compact 18-inch design saves counter space
- Accommodates large pots and plates up to 11 inches
- Digital controls with LED display
- Heated Dry eliminates need for towel drying
- Sanitize cycle suitable for baby bottles
Cons
- Only holds 8 place settings (smaller than standard 24-inch models)
- Requires special dishwasher detergent (not regular dish soap)
SPT SD-9263SSC 18-Inch Portable Dishwasher
The SPT SD-9263SSC is a portable dishwasher with an 8-place setting capacity and ENERGY STAR certification. It offers six wash programs including a rapid cycle, and its stainless steel interior resists stains. The included faucet adapter makes it easy to connect to your kitchen sink.
Pros
- ENERGY STAR certified for efficiency
- Stainless steel interior is durable and easy to clean
- Includes faucet adapter for simple setup
- Adjustable upper rack accommodates large pots
- Time delay allows flexible scheduling
Cons
- Heavy at 114 pounds
- Large footprint may not fit small kitchens
BLACK+DECKER BPD8W 18-Inch Portable Dishwasher
This portable dishwasher from BLACK+DECKER offers impressive capacity for its size, cleaning up to eight place settings with a stainless steel tub and adjustable top rack. Its quick-connect faucet hookup and worktop design make it a flexible option for kitchens without built-in space.
Pros
- No permanent installation needed
- Large capacity for 18-inch dishwasher
- Multiple wash cycle options
- Extra counter space when idle
- Child lock enhances safety
Cons
- Requires faucet connection for water
- Heavy at 116 pounds
SPT SD-6513WA 24-Inch Portable Dishwasher
This portable dishwasher offers six wash programs and a stainless steel interior in a compact 24-inch width. With a 52 dBA noise level and Energy Star certification, it is a quiet and efficient option for small kitchens or apartments.
Pros
- Stainless steel tub resists stains and odors
- Quiet 52 dBA operation
- Energy Star certified
- 24-hour delay start
- Multiple wash programs for versatility
Cons
- Heavy at 132 pounds for a portable unit
- Only available in white
Collier Kitchen Portable Dishwasher
This compact countertop dishwasher from Collier Kitchen offers flexible installation with both a built-in water tank and optional hose connection. Its five wash programs handle everything from delicate glassware to heavily soiled pots. Ideal for small spaces like apartments or RVs.
Pros
- Dual water supply options for flexibility
- Five versatile wash programs
- Compact and space-saving design
- Easy faucet hookup with included adapter
- Lightweight and portable
Cons
- Small size may limit dish capacity
SEAGTOM Countertop Dishwasher with Water Tank
This SEAGTOM countertop dishwasher offers a built-in water tank and dual water supply options, ideal for small spaces without permanent plumbing. It features 10 programs, hot air drying, and a compact design that fits up to 50 pieces of tableware.
Pros
- No permanent plumbing required
- Large capacity for its size
- Hot water washing up to 167°F
- Separate drying and storage functions
- Child lock for safety
Cons
- Some water drops may remain after drying
- Heavier than expected at 33.7 pounds
- Limited to small households
Midea 18-Inch Built-In Dishwasher
A slim 18-inch built-in dishwasher with an 8-place-setting capacity and stainless steel tub. It offers six wash programs plus heated dry and sanitize cycles, making it a practical choice for small kitchens or apartments.
Pros
- Space-saving slim design
- Stainless steel tub resists rust
- Heated dry eliminates towel drying
- Sanitize cycle kills bacteria
- Digital display with LED control panel
Cons
- Limited to 8 place settings
- Requires dishwasher-specific detergent only
SPT SD-9263SSB 18" Portable Dishwasher
This compact portable dishwasher from SPT fits easily into small kitchens or apartments with its 18-inch width and stainless steel tub. It offers six wash programs including a rapid cycle and an adjustable upper rack, making it a versatile option for households that need a dishwashing solution without permanent installation.
Pros
- Energy Star efficient
- Stainless steel tub for durability
- Adjustable upper rack
- Six wash program options
- Quick connect faucet adapter
Cons
- Heavy at 114 pounds for a portable
- Limited 8 place setting capacity
EUHOMY Countertop Dishwasher 40dB
This compact dishwasher from EUHOMY fits up to 30 dishes and offers six washing cycles including a fast 29-minute mode and a heavy-duty baby care setting that heats water to 167°F. Its dual water input (built-in tank or faucet connection) makes it versatile for apartments, RVs, and boats.
Pros
- Quiet operation at 40dB
- Spacious rack for a countertop model
- Versatile water supply options
- Effective hot air drying system
Cons
- Not compatible with liquid detergent
- Faucet adapter may be needed separately
Best 18 Inch Portable Dishwasher Buying Guide
Size and Capacity
At 18 inches wide, these dishwashers fit neatly into most standard kitchen counter gaps or can be parked beside a sink. Most models accommodate 8 place settings, which is enough for a two-person household or small family.
Look for adjustable upper racks to fit taller items like wine glasses or mixing bowls. If you need more space, consider a larger unit from our best dishwasher roundup.
Wash Programs and Features
Typical programs include heavy, normal, eco, glass, and rapid cycles. Some models add a sanitize option certified by NSF, which is valuable for households with infants or immune-sensitive members.
Delay start (often up to 24 hours) lets you schedule washes during off-peak hours. For tips on maintaining your dishwasher’s performance, read our best dishwasher cleaner guide.
Noise Levels
In tight living quarters, dishwasher noise matters. Decibel ratings typically range from 40 dB (whisper-quiet) to 55 dB (conversational). Models around 50 dB are acceptable, but if your kitchen is open to a living area, aim for 45 dB or lower.
Quieter units often have better insulation, which also improves energy efficiency. For other quiet appliance options, browse our appliances category.
Installation and Portability
Most portable dishwashers connect directly to your kitchen faucet with an included adapter. Some models also offer a built-in water tank for homes with non-standard faucets or where hookup is inconvenient.
Wheels are standard, but check that the unit rolls smoothly on your flooring. For a deeper look at tank-based units, see our best countertop dishwasher with water tank guide.
Energy Efficiency and Durability
ENERGY STAR certification ensures lower water and electricity consumption. A stainless steel interior resists stains and odors better than plastic, and it helps maintain consistent drying temperatures. Many portable dishwashers also include a rinse aid indicator to avoid spotty dishes.
For more on efficient kitchen upgrades, check out our best undercounter dishwasher article.
Why You Should Trust Us
At BestProducts, we know that trust is built on thorough research. Each dishwasher in this guide has been assessed using our proprietary BP Score (0 to 10), which weighs specifications, expert review consensus, and verified buyer feedback.
We do not conduct our own product trials; our evaluations are grounded in research, published data, expert review consensus, and verified buyer feedback.
When you purchase through our Amazon links, we may earn a commission, but this does not influence our recommendations. Our goal is to help you make an informed decision with confidence.
Final Thoughts
After comparing the top contenders, we have selected a few standouts that earned top BP Scores in their categories.
- Best Overall: SPT SD-9263SSB 18-Inch Portable Dishwasher, With a BP Score of 9.9/10, this model delivers six wash programs, a stainless steel tub, and reliable cleaning that owners love. The adjustable upper rack and 24-hour delay add everyday convenience.
- Best for Budget Shoppers: Collier Kitchen Portable Countertop Dishwasher, Despite its low price, this compact unit earns a 9.9/10 BP Score with five wash cycles and a dual water tank/hose setup, perfect for apartments or RVs.
- Best Countertop Option: EUHOMY Countertop Dishwasher Portable, This 9.9/10 scorer offers eight programs, a 40 dB noise level, and a built-in tank, making it ideal for kitchens with limited counter space.
- Best Built-In Alternative: Midea 18 Inch Built-In Dishwasher, For those who can install a permanent unit, this 9.9/10 model provides eight place settings and a stainless steel tub at a mid-range price.
Frequently Asked Questions
Can an 18-inch portable dishwasher fit under standard countertops?
Yes, most 18-inch portable dishwashers are designed to slide under a standard 36-inch countertop, leaving room for the top to open. Always measure your space and check the product dimensions, including clearance for the hose.
How do I connect a portable dishwasher to my faucet?
Portable dishwashers use a quick-connect adapter that attaches to your kitchen faucet. The included hose then screws onto the adapter. Most units work with standard threaded faucets; a universal adapter is usually provided.
Are there models with a built-in water tank?
Yes, several countertop models in our list, such as the EUHOMY and SEAGTOM units, feature an onboard water tank. This allows them to operate without a faucet connection, which is ideal for RVs, dorms, or temporary setups.
What is the typical noise level of these dishwashers?
Noise levels range from 40 dB (very quiet) to 55 dB (moderate). Most portable models fall between 48 and 52 dB, which is about the level of a normal conversation. Look for lower dB ratings if you have an open-concept layout.
How many place settings should I expect?
Most 18-inch portable dishwashers hold 8 place settings, which can include dinner plates, bowls, glasses, and silverware. Some models with adjustable racks fit slightly more. Check the manufacturer’s specification for exact capacity.
Do I need a sanitize cycle?
A sanitize cycle uses high temperatures to kill bacteria and is NSF-certified. It is recommended for households with young children, elderly members, or anyone with a compromised immune system. Not all portable models include this feature, so check the cycle list.
About the author
Salvador reviews clothes dryers and dishwashers for BestProducts, comparing cycle performance, noise levels, and running costs over years of use. He steers readers toward quiet, efficient machines that earn their place in a busy household.