Energy labels make it easier to compare how much energy appliances use, but the headline rating is only one part of the decision. Use this guide to compare like with like, estimate running costs for your own routines, and choose an appliance that fits your home.
1. Identify the label system and product category
Start by checking which label system applies where you live. Labels differ by country and product category, and their scales are not always directly comparable. For example, a letter grade on one system may use a different scale or testing method from a letter grade elsewhere. Compare products sold under the same system whenever possible.
Then confirm that you are looking at the label for the exact model and configuration. Similar model names can cover different sizes, finishes or features, and those differences may affect energy use. Check the model number on the product listing against the manufacturer’s product information. If a listing gives only a broad range or family name, look for the label linked to the precise model before making a comparison.
Labels commonly show a combination of:
- An efficiency class or rating scale.
- Energy consumption over a stated period or number of cycles.
- Capacity, such as usable volume, load weight or place settings.
- A noise figure, water consumption or other category-specific measure.
- A QR code or model reference that leads to further product information, where provided.
The rating summarizes performance against the rules of that label system. The consumption figure is usually more useful for estimating energy use, but it is still based on a defined test. Neither tells you exactly what a particular household will use.
2. Compare capacity and function before the grade
An efficient rating does not make two appliances a fair comparison if they do different jobs. First decide what size and functions you actually need. Then compare models in that range.
For a refrigerator, compare usable capacity and layout, and make sure the models have similar configurations. A larger model may use more energy overall even if its rating is as good as that of a smaller one. For a washing machine, compare rated load capacity and the cycle or program named on the label. For a dishwasher, check place settings and the referenced program. For an oven, compare models with similar cooking functions and usable capacity if those details are available.
Ask these practical questions before ranking the labels:
- Will the appliance fit the available space, including required ventilation or door clearance?
- Does its capacity suit typical use, rather than an occasional maximum load?
- Are the main functions and installation type comparable?
- Does the label report consumption using the same unit and test basis?
A larger capacity can be helpful if it lets you combine loads or store the food you need. It can also be unnecessary if it means paying to run unused space. Choose the size that fits your regular needs; do not assume the biggest appliance is automatically the best value.
3. Read the energy figure, not just the colored arrow
Find the consumption number and its unit. Depending on the appliance and label, it may be stated per year, per 100 cycles, per cycle, or per another defined interval. Record the figure and basis for each model. A smaller number is generally lower consumption only when the products use the same basis and perform a comparable task.
| Label figure | What it helps you compare | What to check alongside it |
|---|---|---|
| kWh per year | A standardized annual estimate, often for appliances that run continuously | Capacity, configuration and the label’s assumed conditions |
| kWh per 100 cycles | Energy for a stated number of standardized cycles | The named program, load and cycle assumptions |
| kWh per cycle | Energy for one stated test cycle | Whether it is the same program and comparable load |
| Capacity or volume | How much the appliance can hold or process | Whether the size suits your household’s routine |
Do not compare an annual figure on one label directly with a per-cycle figure on another without converting them to the same period and usage assumption. For a per-100-cycle figure, for example, an approximate estimate for your expected number of cycles is:
label kWh per 100 cycles ÷ 100 × expected cycles per year
This is a planning estimate, not a prediction. Your result can differ because you may use different programs, loads, temperatures, settings or amounts of hot water. The same applies to annual figures: they reflect the label’s test conditions, not a guarantee of your bill.
Check the program behind the number
Many labels base energy use on a particular program or standardized test. Laundry labels may name an eco program, while dishwashers may report a specified cycle. These programs can take longer than a quick setting. A label value for the test program does not mean every available program uses the same amount.
Look in the product information for the program, load and test conditions. If the label does not make the basis clear, consult the manufacturer’s product sheet or manual. If you still cannot establish what the figure means, treat the comparison as incomplete rather than guessing.
4. Compare kitchen appliances
Kitchen appliances differ in how often they run and how much their size and settings matter. Use the category-specific details instead of relying on a single grade.
Refrigerators and freezers
These appliances usually operate continuously, so an annual consumption figure is a useful starting point. Compare models with similar usable volume and similar refrigerator/freezer arrangements. A combined model, a separate freezer and a refrigerator may have different capacities and layouts, so their headline ratings alone do not make them equivalent.
Check whether the stated capacity meets your needs and whether the appliance can be installed as intended. Built-in models may have particular ventilation and clearance requirements; follow the manufacturer’s instructions. Poor placement, unsuitable ambient conditions or frequent door opening can affect real-world use. A label cannot account for every kitchen layout or household habit.
Dishwashers
Compare the same place-setting capacity and the consumption for the same labeled program. Consider how often you expect to run a full load. A model with a lower per-cycle figure may not save energy if its usable capacity leads you to run it more often, while choosing an oversized model can leave you with unused capacity.
Check water consumption and noise if those matter in your home. These figures describe separate trade-offs; a low energy number does not automatically mean low water use or quiet operation. Follow the manual for loading, detergent and program selection. Avoid assuming that a particular short cycle is the most efficient just because it finishes sooner.
Ovens and other cooking appliances
For ovens, compare the same appliance type and broadly similar capacity and functions. A label’s test consumption may not represent every cooking mode, temperature or recipe. If you use several functions regularly, consult the product information for how the modes differ, where details are available.
The label may be less decisive when your cooking habits vary widely. Make a shortlist based on capacity, installation and useful functions, then use the label as one comparison point. Do not treat a rating for one standardized test as a measure of every cooking task.
5. Compare laundry and cleaning appliances
Washing machines
Match load capacity and the cycle used for the label figure. The stated energy use may refer to an eco program or a defined set of cycles. Your actual consumption depends on how full the drum is, the selected temperature, program and settings, and how often you wash.
Consider whether the capacity fits your usual loads. A machine that is too small can require more cycles; a much larger one may be a poor fit if you rarely need its capacity. Compare water consumption and noise figures as well if they matter to your household. For installation, drainage, electrical connection and care, use the manufacturer’s instructions rather than general assumptions.
Washer-dryers and tumble dryers
Do not compare a washer-dryer’s combined performance with a washing machine’s label as if they describe the same service. Check whether the label reports washing and drying separately, and note the capacity for each operation. A washer-dryer may have a smaller drying capacity than washing capacity, which affects how you use it.
For tumble dryers, compare the same dryer type and capacity, and check the label’s consumption basis. If you will use the appliance for a mix of loads and programs, a single standardized figure has limits. Installation and ventilation requirements vary by model, so check the manual before deciding that a particular type will suit your space.
Vacuum cleaners and other cleaning equipment
Label requirements and displayed measures vary by market and product. If a product has no comparable energy figure, do not infer its efficiency from a rating shown for another category. Compare the manufacturer’s stated power or consumption only when the units and test conditions are clear, and consider the cleaning performance and accessories you need.
For cordless equipment, runtime and charging behavior may be more relevant to practical use than a simple power figure. Check that any claimed runtime refers to a setting and accessory you would use. Battery performance can vary with age, floor type and mode, so label data cannot fully predict your experience.
6. Turn label figures into a running-cost estimate
To estimate electricity cost, multiply expected energy use in kilowatt-hours by the price you pay per kilowatt-hour. Use the unit price shown on your own bill or plan; do not assume that a single rate applies everywhere or to every tariff.
estimated annual energy cost = estimated annual kWh × your electricity price per kWh
For a label that gives kWh per 100 cycles, first estimate how many comparable cycles you will run in a year and convert the figure to annual kWh. For a continuously operating appliance with an annual label figure, you can use that figure as a starting estimate. Keep the assumptions next to the result so you can compare alternatives consistently.
A simple worksheet can include:
- Model and exact model number.
- Capacity and key configuration.
- Label consumption and its unit or test basis.
- Your estimated annual use, with cycles or other assumptions.
- Your electricity price per kWh.
- Estimated annual energy cost.
- Other priorities such as noise, water use, installation and useful functions.
Use the same assumptions for every model. If your electricity rate varies by time or season, a single unit price may only give a rough comparison. Also remember that an energy estimate does not include purchase price, delivery, installation, maintenance or repair costs. Consider these separately when weighing overall value; do not treat a lower estimated electricity cost as proof that a model is cheaper to own.
7. Troubleshoot confusing or conflicting information
The online listing and product label show different values. Check that both refer to the exact same model number, size and configuration. Listings can group variants together or contain outdated details. Use the manufacturer’s product information or the label associated with the exact model to resolve the difference.
Two labels have different units. Convert them to a common basis only when you know the test and usage assumptions. If the underlying programs or capacities differ, the converted results may still not be a fair comparison.
The rating scale looks unfamiliar. Check the country or regional label system and the category. Do not assume that a letter grade from another system has the same meaning. Compare products within one system and use their consumption figures and capacities as supporting information.
The label figure seems unlike your experience. Review the program, settings, loads and frequency assumed by the label. Check the appliance manual for recommended operation and care. Your routines and home conditions may differ from the standardized test, and a label is not a promise of a particular bill.
A key figure is missing. Look for the manufacturer’s product sheet or manual. If you cannot confirm the model’s capacity, consumption basis or installation needs, ask the seller or manufacturer for the exact information before relying on a comparison.
8. Make the final comparison useful
Once you have two or three comparable models, rank them in this order: suitability for your space and routine, comparable capacity and functions, energy use on a common basis, then other priorities such as water, noise and controls. This keeps a strong headline grade from distracting you from a poor fit.
Use labels as a screening tool. They support a fair estimate when model, category, capacity and test basis align. They cannot predict every household’s energy use, establish product durability, or replace the installation and care instructions for a specific model. Keep a note of the figures and assumptions you used; if your expected usage changes, update the running-cost estimate before treating it as a long-term comparison.