Between 45 and 60 cm, it's not just the size that differs: capacity (place settings), consumption per place setting, and loading convenience all change. Here's a simple guide to understand which dishwasher actually makes sense based on your space and number of people.
Between a 45 cm and a 60 cm dishwasher, the difference isn't just about size. The actual capacity changes (place settings), water consumption per place setting changes, and loading convenience changes. In short: the 60 cm is worth it if you wash frequently or live in a family; the 45 cm makes sense when kitchen space is really tight and there are one or two people.
Quick answer. If you have space, when in doubt choose 60 cm: it washes more place settings and uses less water per plate. Switch to 45 cm only when the available niche requires it or when you wash small and infrequent loads.
In brief: what you'll find in this guide
Capacity: how many place settings it actually washes
The "place setting" is the unit used to measure a dishwasher's capacity: one place setting corresponds to the set of plates, glass and cutlery for one person at a meal. It's the most useful figure to understand if a model is right for you.
45 cm: approximately 9-10 place settings. Covers daily meals for one or two people well.
60 cm: approximately 13-14 place settings (some models reach 15). Suitable for families and those who accumulate bulky items like pots and baking trays.
The practical point isn't "how many place settings on paper", but how many times you need to run the machine. A 45 cm that's too small for your household forces you to wash more frequently, and this is reflected in consumption (see below).
Dimensions: what changes and what doesn't
Between the two formats, essentially the width changes. Height and depth remain within standard built-in specifications, so the choice depends almost solely on the width of the niche or space available.
| Feature | 45 cm (slim) | 60 cm (standard) |
|---|---|---|
| Width | approximately 44.8-45 cm | approximately 59.8-60 cm |
| Place settings (approximate) | 9-10 | 13-14 |
| Water per eco cycle* | approximately 9 litres | approximately 9.5 litres |
| Water per place setting* | approximately 0.90 litres | approximately 0.67 litres |
| Height / depth | standard (approximately 82-85 / 55-60 cm) | standard (approximately 82-85 / 55-60 cm) |
| Ideal for | 1-2 people, limited space | families, frequent use |
*Approximate values based on the eco programme. Exact data varies from model to model: always check the energy label and the manufacturer's sheet. Reference data as of 06/09/2026.
Consumption: why the smaller one isn't always the most economical
This is where the most common mistake happens: thinking that "smaller" automatically means "consumes less". In absolute terms a 45 cm uses slightly less water per cycle, but it also washes many fewer place settings. What matters is the consumption per place setting.
The method is simple: water per cycle divided by place settings washed.
45 cm: approximately 9 litres per 10 place settings = approximately 0.90 litres per place setting.
60 cm: approximately 9.5 litres per 14 place settings = approximately 0.67 litres per place setting.
The 60 cm, making better use of the tank volume, is more efficient per plate washed (around 25% less water per place setting). If your load regularly fills a 60 cm, a single full wash beats two half washes of a 45 cm. The same reasoning applies to energy: a full cycle optimizes water and electricity better than several partial cycles.
The correct interpretation is therefore: the 45 cm is worthwhile when your loads are really small, not when you have a lot to wash in limited space. To compare consumption and energy labels of updated models, you can compare dishwashers on SniffaPrezzi.
Pros and cons of the two formats
45 cm dishwasher
Concrete advantage: takes up little space, frees up room for cabinets and drawers in narrow kitchens or studio apartments.
Advantage: slightly lower absolute consumption per cycle, useful if you wash small loads.
Main limitation: fewer place settings and less flexible baskets for large pots and baking trays.
Limitation: less efficient per place setting; with frequent loads you may end up consuming more.
60 cm dishwasher
Concrete advantage: greater capacity and adjustable racks, ideal for families and bulky dishes.
Advantage: better efficiency per place setting on water and energy.
Main limitation: requires more width, not always available.
Limitation: if it often remains half empty, the efficiency advantage decreases.
How to choose: the grid in three questions
Answer these three questions, in order.
How much width do you have? If the niche is under 50 cm, the 45 cm is almost mandatory.
How many of you are there? One or two people: 45 cm is sufficient. Three or more: 60 cm is better.
How much and how do you cook? If you often use pots, baking trays and have guests, the 60 cm pays off in convenience and consumption.
Choose the 45 cm if: space is the main constraint, you're alone or a couple and loads are small.
Choose the 60 cm if: you have the space, you're a family or wash often, and you want the lowest consumption per place setting.
Where to check models, availability and prices
Before deciding, it's worth looking at actual models in both formats and comparing their features and prices. The main brands (Bosch, Siemens, Electrolux, Smeg, Hisense) offer dishwashers in both 45 and 60 cm.
To see available models in both formats you can view the dishwashers section on OpportunityCommerce.
To compare prices between sellers you can compare offers on SniffaPrezzi.
For reliable technical data (place settings, energy class, noise level) always refer to the manufacturer's official product sheet and the energy label of the specific model.
Common mistakes
Choosing the 45 cm just to save money: if you then wash twice a day, the savings disappear.
Looking only at declared place settings: the flexibility of racks for your actual utensils also matters.
Ignoring the energy label: with the same format, between two models the difference in annual consumption can be significant.
Underestimating noise: in kitchens open to the living room the decibels make a difference; it's a data point shown on the product sheet.
Portos in-depth guides
The same logic "it's not the biggest, it's the most suitable" applies to the entire kitchen. If you're renovating appliances, also read The right refrigerator isn't the biggest one: capacity, consumption and quietness with the same selection method.
In upcoming Portos content we'll explore built-in and freestanding installation, how much a dishwasher really consumes and how to keep it efficient over time.
Once you've chosen the width, there's the model: two 60 cm dishwashers from the same brand, same niche and same 14 place settings can have three energy class differences and a different installation constraint on the door weight. The comparison is between Bosch SMV4HVX03E and SMH6YCX02E.
Note on data and method
This is a Portos editorial analysis based on product specifications, energy labels and processing of consumption data. Place setting and litre values are indicative and refer to standard market formats: the definitive data is always that provided by the manufacturer for the specific model. Verified on 06/09/2026. Prepared by Portos Editorial Team.
Also worth reading: for the complete picture on place settings, consumption and programs, see the guide How to choose a dishwasher.
