Dishwasher: How to Buy the Right One
A dishwasher is a long-term appliance you'll live with daily for a decade, so two unglamorous things matter most before any feature: does it physically fit your cabinet opening, and how quiet is it? Get the measurements and the noise rating right, and the rest — efficiency, racking, tub material — is about matching the machine to your kitchen and habits.
Key takeaways
- Fit: measure the cavity is a priority — see why below.
- Noise level (decibels) is a priority — see why below.
- Energy & water efficiency is a priority — see why below.
- Decide the job first, then buy the minimum that does it well for the next few years.
The most common dishwasher mistake happens before you even shop: not measuring the cavity. Built-in dishwashers come in standard widths, but the height, depth and the opening's exact dimensions vary, and a machine that doesn't fit is an expensive return. Measure the width, height and depth of the opening, and check your plumbing and electrical connections, before you fall for any model.
After fit, noise is the feature people underestimate and then notice every single day, especially in open-plan kitchens where the dishwasher runs near living space. Decibel ratings tell the story: lower is quieter, and the best machines are barely audible. From there, prioritise an Energy Star rating for lower running costs, a stainless-steel tub for better drying and longevity, and racking — like a third rack — that fits the way you actually load.
What actually matters when buying a dishwasher
Fit: measure the cavity
Before anything else, measure the opening — width, height and depth — and confirm your water, drain and electrical connections. Built-in dishwashers follow standard widths, but heights and depths vary, and 'standard' is not universal; a machine that won't fit the cabinet is a costly return. Note any tall tubs or thick doors that could change the fit. Getting the measurements right first saves the single most common and frustrating dishwasher-buying mistake.
Noise level (decibels)
You'll hear the dishwasher every day, so its decibel (dB) rating matters more than buyers expect — and lower is quieter. Quiet machines (around the mid-40s dB or below) are barely audible, which is a real comfort in open-plan kitchens where the dishwasher runs near living and dining space. Louder budget models can intrude on conversation and TV. If your kitchen opens onto living areas, prioritise a low decibel rating; it's a quality-of-life feature you'll appreciate for years.
Energy & water efficiency
A dishwasher runs hundreds of times a year, so efficiency directly affects your bills. Look for an Energy Star qualification, which certifies lower energy and water use than standard models — and modern efficient dishwashers typically use less water than washing the same load by hand. The running-cost savings add up over a decade of use. Check both the energy rating and water consumption, since an efficient machine pays back part of its price over its life.
Tub material (stainless steel)
The tub is the interior, and stainless steel is generally the better choice over plastic. Stainless tubs retain heat better, which improves drying (especially with energy-saving condensation drying), resist staining and odours, and tend to last longer. Plastic tubs cost less and are perfectly serviceable but can stain and hold smells over time, and dry less effectively. If drying performance and longevity matter to you, a stainless-steel tub is worth prioritising.
Racking & third rack
How a dishwasher loads day to day depends on its racks. Adjustable, foldable tines and a height-adjustable upper rack let you fit awkward pots, tall glasses and big platters. A third rack — a shallow top tier — adds room for cutlery, utensils and small items, freeing space below and improving capacity. Look at the racking with your own dishes in mind; flexible racks that suit how you load make every cycle easier and more efficient.
Capacity (place settings)
Dishwasher capacity is rated in 'place settings' — a standard set of dishes for one person. A larger household or one that entertains benefits from more place settings and flexible racking; a couple or small kitchen can do well with a compact or standard capacity. Bigger isn't automatically better if it won't fit or you rarely fill it. Match the capacity to your household size and how often you run full loads.
Cycles & features
Most people use only a few cycles, so don't overpay for a long menu of programs you'll never touch. Useful options include an eco cycle for efficiency, a heavy cycle for pots, a quick wash for lightly soiled loads, and a soil sensor that adjusts the wash automatically. A delay-start timer is handy for running off-peak. Focus on the handful of cycles and features you'll actually use rather than a crowded control panel.
The jargon, decoded
Specification sheets are full of terms designed to sound impressive. Here is what the ones that matter actually mean in plain language.
| Term | What it means |
|---|---|
| Decibel (dB) | A measure of how loud the dishwasher is. Lower is quieter; mid-40s dB or below is barely audible in open-plan kitchens. |
| Energy Star | A certification for appliances that meet higher energy- and water-efficiency standards, lowering long-term running costs. |
| Place setting | A standard set of dishes for one person, used to rate capacity. More place settings suit larger households. |
| Stainless-steel tub | A metal interior that dries better, resists stains and odours and lasts longer than a plastic tub. |
| Third rack | A shallow top tier for cutlery, utensils and small items, freeing space below and adding capacity. |
| Condensation drying | An energy-saving drying method using residual heat and a stainless tub instead of a power-hungry heating element. |
How much should you spend? Budget tiers
There is no single 'right' price — only the right price for what you need. These tiers show what your money realistically buys.
| Tier | Typical price | What you get |
|---|---|---|
| Budget | $350 – $550 | A functional built-in dishwasher with the core cycles and a plastic tub. Cleans well for everyday use; expect a higher decibel rating and fewer racking options. Confirm it fits your cavity and prioritise an Energy Star model even at this tier for lower running costs. |
| Mid-range | $650 – $1,000 | The value sweet spot: a quieter machine (lower dB), a stainless-steel tub for better drying, flexible racking often including a third rack, a soil sensor and Energy Star efficiency. For most households this tier balances quiet, efficiency and convenience without premium prices. |
| Premium | $1,200 + | The quietest machines with the lowest decibel ratings, premium stainless tubs, highly adjustable racking, advanced sensors and refined drying. Worth it for open-plan kitchens where quiet matters most and households that run the dishwasher constantly, where the comfort and durability earn their cost over a decade. |
Browse current dishwasher listings on Amazon →
A simple decision flowchart
If you only remember one thing, let it be this: match the purchase to how you'll really use it. Follow the path that fits you.
Common mistakes (and how to avoid them)
1. Not measuring the cavity first
The most common dishwasher mistake is skipping the measurements. Built-in machines follow standard widths, but heights and depths vary, and a unit that won't fit your cabinet opening is a costly, frustrating return. Measure width, height and depth, and confirm your water, drain and electrical connections, before you shop for any model. Fit comes before features, always.
2. Ignoring the noise rating
Buyers focus on cleaning and forget noise — then hear a loud dishwasher every day, especially in open-plan kitchens. Decibel ratings tell you what to expect: lower is quieter, and the best machines are barely audible. If your kitchen opens onto living areas, a low dB rating is a quality-of-life feature well worth prioritising over a longer cycle menu.
3. Overpaying for unused cycles
A control panel crammed with programs sells well but most people use only a few cycles. Paying a premium for a long menu you'll never touch is wasted money. Focus on the handful that matter — eco, heavy, quick wash and a soil sensor — and put the budget toward what you'll feel daily: lower noise, a stainless tub and efficient running costs.
4. Skipping efficiency for a lower price
A dishwasher runs hundreds of times a year, so a cheaper, less efficient model can cost more over its life in energy and water. An Energy Star machine uses less of both — typically less water than hand-washing the same load — and pays back part of its price over a decade. Weigh running costs, not just the sticker price, when comparing models.
When is the best time to buy?
Dishwashers and other major appliances are cheapest during the traditional appliance-sale months — notably September and October, when new models arrive and retailers clear the previous line-up — and around major holidays and Black Friday. End-of-year and spring sales also bring deals. Buying an outgoing model during these windows often gets you a better-specified machine for less, since core dishwasher technology changes slowly year to year.
Tip: our seasonal sale calendar maps the cheapest months for every major category, and the discount calculator tells you what a sale price really works out to.
Frequently asked questions
How quiet should a dishwasher be?
As quiet as your kitchen layout demands — and decibels (dB) tell you. Lower numbers are quieter: machines around the mid-40s dB or below are barely audible, while louder budget models can intrude on conversation and television. If your kitchen is open-plan and the dishwasher runs near living or dining space, prioritise a low decibel rating; you'll notice it every day. In a closed kitchen, noise matters less and you can weight other features more heavily.
What size dishwasher do I need?
First, the size that fits — measure your cabinet opening's width, height and depth before shopping, since a machine that doesn't fit is a costly return. Then match capacity, rated in 'place settings', to your household: a couple or small kitchen suits a compact or standard size, while larger families or those who entertain benefit from more place settings and flexible racking. Bigger isn't automatically better if it won't fit or you rarely fill it, so size to your space and habits.
Is a stainless-steel tub worth it?
For most buyers, yes. A stainless-steel tub retains heat better, which improves drying — especially with energy-saving condensation drying — and it resists stains and odours while lasting longer than plastic. Plastic tubs cost less and clean dishes perfectly well, but they can stain and hold smells over time and dry less effectively. If drying performance and longevity matter to you, the stainless tub is a worthwhile upgrade; if budget is tight, a plastic tub still does the core job.
Does an Energy Star dishwasher save money?
Over its life, yes. A dishwasher runs hundreds of times a year, so the difference between an efficient and an inefficient model adds up in energy and water bills. An Energy Star machine is certified to use less of both, and a modern efficient dishwasher typically uses less water than washing the same load by hand. The running-cost savings help offset the purchase price across a decade of use, so it's worth weighing efficiency alongside the sticker price.