Define one complete cycle
For a useful comparison, start when the program begins and finish when the selected washing and drying stages are complete. Note the program, options and load. A reading that ends before heated drying cannot be compared directly with one that includes it.
Check where hot water comes from. A meter at the dishwasher records that appliance’s electricity, but may omit energy used by a separate water heater. An annual label estimate can have a different measurement boundary. Record what each figure includes before adding it to another cost.
Calculate per load and per month
Suppose one hypothetical complete cycle uses 0.9 kWh at $0.18/kWh. Its electricity cost is 0.9 × $0.18 = $0.162. Twenty cycles cost $3.24, and 30 cycles cost $4.86. Round after multiplication instead of multiplying the already rounded $0.16 figure.
If a second program uses 1.2 kWh and produces the same acceptable result, the difference is 0.3 kWh, or $0.054 per cycle. Across twenty cycles, that is $1.08. These are invented examples; they do not assign typical consumption to a brand or program name.
Compare a finished job, not just a short program
ENERGY STAR suggests considering cycle options, scraping food rather than routinely pre-rinsing, and running full loads where appropriate. Load according to the manufacturer’s instructions so the dishes can be cleaned properly; crowding the racks is not the same as using their intended capacity.
Check whether the selected program actually cleans and dries what you need. A short cycle that must be repeated can use more energy for the finished job. Record repeat washes and any extra drying rather than treating the first program’s result as the whole cost.
Make the estimate relevant to your apartment
When shopping for a compact dishwasher, consider how many cycles it would take to handle your household’s dishes. ENERGY STAR notes that smaller capacity can lead to greater use over time. A lower per-cycle number is not enough if you need twice as many cycles.
Keep electricity, water, sewer charges and detergent as separate budget lines. If a utility is included in rent, distinguish the resource used from the cost you personally pay. For another appliance measured by cycle, the same boundary question appears in our laundry cost guide.
Choose your next step
Continue with the question that matches your next decision:
Sources & further reading
Numerical examples are illustrative unless explicitly described as measured. This guide does not claim hands-on product testing. Read the methodology and editorial disclosure.