Dishwasher Buying Guide: 10 Things to Know First
Before you buy a dishwasher, you need to know your kitchen’s size, your budget, and the three main types available. Measure your space first to avoid buying one that simply won’t fit. The biggest mistake we see is skipping this crucial step and then facing a costly return.
Buying a dishwasher is a big appliance purchase. It’s not just about washing dishes; it’s about noise levels, energy use, and how much you can actually fit inside. We found that understanding the different levels of quality and the features that matter most will save you money and stress. Choosing the wrong model can mean loud cycles or dishes that never dry properly, so a little homework goes a long way.
- Measure your cutout space for a standard 24-inch model or a compact 18-inch model.
- Pick your type: built-in, portable, or drawer. All three serve different needs.
- Check the decibel rating (dBA) 44 or lower ensures it’s truly quiet.
- Look for a stainless steel tub—it dries better and lasts longer than plastic.
- Compare wash cycles for your needs, especially a heavy-duty option for pots.
Below, we break down everything you need to know before buying, from fit and install to the features actually worth your cash. Let’s walk through it step by step so you can buy with total confidence.
Key Factors to Consider for Your New Dishwasher
Buying a dishwasher comes down to three big things: your space, your budget, and how you cook. We found that matching these three basics to your kitchen routine makes the whole process easier. If you skip this step, you might end up with a machine that fights your lifestyle instead of helping it.
Think of it like buying a pair of shoes. You wouldn’t grab a size 9 without checking your foot first. The same logic applies here. Let’s break down each factor so you can walk into any store feeling prepared.
Measure Your Kitchen Cutout Space First
This is the single most important step you can take. Measure the width, height, and depth of the opening where the dishwasher will go. Write these numbers down and keep them in your phone. You will reference them constantly.
Most homes have a standard 24-inch wide opening. But older homes or apartment kitchens might have an 18-inch space. If you have a smaller opening, you are looking at compact or slim models. These hold fewer dishes but still get the job done well.
Tools You Need for Accurate Measurements
- A metal tape measure (fabric ones stretch and lie to you)
- A notepad or your phone notes app
- A level to check if the floor is even
Measure the opening at the top, middle, and bottom. Flooring can bow over time, and you want to catch that before you buy. Check that the water supply line and electrical outlet are within reach. If they are too far, installation costs go up fast.
Built-In, Portable, or Drawer Units
Built-in models are the standard choice. They slide under your countertop and connect to your plumbing permanently. These offer the most capacity and the quietest operation. Most households in the US pick this option.
Portable dishwashers sit on wheels and hook up to your kitchen faucet. We found these are great for renters or small kitchens. You roll them out, use them, and store them away. They take up counter space while running, which is a trade-off to consider.
Drawer dishwashers work like a kitchen drawer that pulls out. They are easy to load without bending down. They cost more for less capacity, but many people love the convenience. These are also great if you wash small loads often rather than saving up for one big wash.
Noise Levels and How to Judge Quiet Operation
Nobody wants a dishwasher that sounds like a jet engine taking off in their kitchen. Noise is measured in decibels, usually shown as dBA on the spec sheet. The lower the number, the quieter the machine runs.
Many experts say that anything above 50 dBA is noticeably loud. It can interrupt conversation or TV time. We found that looking for something in the low 40s or below is the sweet spot for comfort.
| dBA Rating | What It Sounds Like | Is It Worth It? |
|---|---|---|
| 38-40 dBA | Soft whisper, barely noticeable | Yes, if you have an open floor plan |
| 41-44 dBA | Quiet hum, light conversation level | Great balance of cost and comfort |
| 45-47 dBA | Audible but not distracting | Good for closed kitchens |
| 48+ dBA | Loud enough to talk over | Skip these if you can afford more |
Check the rating on every model you compare. Retailers often highlight the quietest models on the showroom floor. Your kitchen isn’t a showroom, so pay attention to the specs, not the sales pitch.
Why a Stainless Steel Tub Matters for Drying
The inside of your dishwasher is either plastic or stainless steel. We found that stainless steel tubs dry your dishes much better. The metal holds heat and transfers it to your dishes faster than plastic ever could.
Plastic tubs are cheaper but they absorb heat and stay wet. This leads to more water spots and longer drying times. Stainless steel also resists stains and odors better over the long haul.
You will pay more upfront for a stainless tub. But it lasts longer and performs better. If you hate hand-drying plates after a cycle, this upgrade is worth every penny.
Wash Cycles and Features You’ll Actually Use
Dishwashers come with many buttons and settings, but you will only use a few of them. We found that focusing on the basics saves you money. Avoid paying extra for features you will never touch.
The normal cycle is your everyday workhorse. It handles typical loads of plates, bowls, and silverware. The heavy or pots-and-pans cycle is for baked-on messes and large cookware. These two are essential.
Smart Features That Add Real Value
A third rack is a game changer for utensils and small items. It adds a dedicated space for spatulas, lids, and measuring cups. This frees up the lower racks for larger dishes and makes loading much easier.
Soil sensors are another feature to look for. They detect how dirty the water is and adjust the cycle automatically. This saves water and energy on lightly soiled loads.
Adjustable tines let you fold down rows of prongs to fit bulky items. You can make room for a large mixing bowl or a tall stockpot without sacrificing space. Look for this flexibility in the lower rack design.
What About Heated Dry and Sanitize Cycles
Heated dry uses a heating element to speed up drying, which is great for plastic items that hold water. But it uses more energy. Sanitize cycles raise the water temperature to kill bacteria, which is helpful if you have kids or someone with a weak immune system in the home (CDC guidelines support this practice for home kitchens).
These options are not required for everyone. If you air-dry your dishes anyway, a heated dry feature just adds waste. Think about your habits before you pay for these extras.
Energy Efficiency and Operating Costs
Dishwashers use both water and electricity, so your utility bill matters. Look for the Energy Star label on any model you consider. Energy Star certified models are more efficient than the federal minimum standard.
These models use less water per cycle, which adds up over a year. They also use better insulation to hold heat, which helps with drying. We found that the cost difference between a standard and an Energy Star model is usually small, but the savings over time are real.
Remember that running a dishwasher uses less water than hand-washing your dishes. Many guidelines point to this being a water-saving choice in homes (EPA.gov). This is true even for older models, but newer ones do it even better. Treat this purchase as a long-term investment in both your comfort and your utility bills.
Installation and Plumbing Requirements
Installation is more than just sliding the unit into place. You need a dedicated electrical circuit and a water supply line. Most homes have these already set up if you are replacing an old unit. But if you are adding a new dishwasher, you need to account for extra labor and parts.
Check whether the unit comes with a power cord or if you need to buy one separately. Dishwashers usually do not include the cord in the box. This is a small but common surprise that adds to your final cost.
Do You Need a Garbage Disposal Connection?
Many dishwashers drain into a garbage disposal unit. This is a common setup in US homes. If you do not have a disposal, you can connect the drain hose directly to the sink pipe. A qualified installer can handle either setup without much trouble.
We found that checking your existing hookups before ordering saves a big headache. If you have questions, take a photo of your under-sink area and show it to a salesperson or installer. This 5-minute check prevents costly mistakes later.
Setting Your Budget and Sticking to It
Dishwasher prices range from a few hundred dollars to well over two thousand. The price difference comes down to features, build quality, and brand reputation. We found that mid-range models in the 700 to 1,000 dollar range offer the best value for most families.
Budget models get the job done but are louder and have plastic tubs. Premium models offer quiet operation, stainless steel, and more flexible racks. Decide which features matter most to you and spend accordingly.
Our Checklist Before You Buy
- Measure your cutout space at three heights
- Confirm you have a grounded outlet within reach
- Check the dBA rating is below 45 for quiet use
- Look for stainless steel tub over plastic
- Confirm the cycle options match your cooking habits
- Set a budget that includes installation and a power cord
Going through this checklist every time you look at a model will keep you on track. It also helps you compare models fairly. You won’t be swayed by flashy marketing or a shiny exterior.
Brand Reputation and Warranty Coverage
Some brands are known for reliability while others are known for features. Research user reviews for the specific model you are considering, not just the brand as a whole. A good brand can still have a bad model.
Check the warranty carefully. Most dishwashers come with a one-year parts and labor warranty. Some brands offer extended warranties on the motor or tub. These parts are expensive to replace, so coverage matters.
Also look at how easy it is to get replacement parts. If you have a simple design, parts are cheaper and available anywhere. Fancy models with custom panels can be harder to fix. Keep this in mind if you plan to keep your dishwasher for more than 10 years.
Final Sizing and Fit Check Before You Commit
Before you hit the buy button, do one last check. Compare your measurements with the manufacturer’s installation requirements. Make sure you have room for the door to swing open fully. This small detail trips up a lot of people.
Check your countertop overhang. A thick countertop edge can stop the dishwasher door from opening enough to pull out the racks. This is a common issue in modern kitchens with thicker stone surfaces.
Finally, confirm your floor level. Dishwashers need a level base to drain properly. If your floors are uneven, a simple shim kit solves this. It is an easy fix that you or an installer can handle in minutes.
Conclusion
Buying a dishwasher comes down to measuring your space, picking the right type, and choosing the features that match how you actually live. You now know to check the dBA rating, look for a stainless steel tub, and compare wash cycles that fit your cooking habits. Keep your budget realistic and include installation costs from the start.
Your next step is simple: grab a tape measure and check your cutout space right now. Write those numbers down. Then compare three models side by side using the checklist above. You have everything you need to make a confident choice that will serve your kitchen well for years.
Frequently Asked Questions
How long should a dishwasher last?
Most dishwashers last between 9 and 12 years with regular use. The stainless steel tub models tend to outlast plastic ones by a few years. If you run heavy loads daily, expect closer to the shorter end of that range.
Is it cheaper to run a dishwasher or hand wash dishes?
Running a dishwasher is almost always cheaper than hand washing. Modern machines use less water per cycle than filling a sink. You also save on energy because you are not heating water continuously while you scrub.
Can I install a dishwasher myself to save money?
You can, but only if you are comfortable with basic plumbing and electrical work. The water line, drain hose, and power connection all need to be done correctly. A small mistake can cause a leak that damages your floors and cabinets, so weigh that risk carefully.
Do I really need a third rack for utensils?
No, but it makes loading easier and gives you more usable space. You can fit more bowls and plates in the lower racks when utensils have their own spot. If you cook a lot and use many small tools, this feature is worth the upgrade.
What is the best time of year to buy a dishwasher?
You will find the best deals around major holidays like Memorial Day, Labor Day, and Black Friday. Many retailers also clear out inventory in September when new models arrive. If you can wait, these windows save you the most money.
