Cost to run a dishwasher
This page gives a quick running-cost estimate for common household appliances. It is useful when users want to compare a dryer with a heated airer, a shower with a short wash, or a background-load appliance against the cost of keeping it on.
How tariff changes affect this appliance
The same appliance becomes more or less expensive as the unit rate changes. Use the tariff comparison to judge the effect of a cheaper or more expensive electricity plan before switching supplier.
- 20p/kWh
- £0.54 per use
- 25p/kWh
- £0.68 per use
- 27p/kWh
- £0.73 per use
- 30p/kWh
- £0.81 per use
- 35p/kWh
- £0.94 per use
What changes this appliance’s cost?
Dishwasher cost is often a programme-comparison problem. Eco, quick and half-load cycles do not behave the same, and drying options can matter more than the headline power rating.
kitchen appliance is the right mental model here because the runtime pattern matters as much as the wattage.
This page is for household devices whose runtime pattern matters more than the sticker power figure.
At the illustration above, one use consumes 2.70 kWh. Five uses would cost about £3.65 and twenty uses about £14.58 at 27p/kWh. Your unit rate and measured consumption produce the most useful estimate.
Worked example
A single appliance session for 90 minutes at 1800W consumes about 2.70 kWh. At 27p/kWh that works out at roughly £0.73 per use, before adding any standing charge. Repeating the same routine five times would cost about £3.65 on the same tariff.
What this calculator does
This page estimates the incremental electricity cost of a single appliance use. It does not include the standing charge, buying price, repairs, detergent or installation. The most accurate input is a measured wall-plug reading or the unit’s energy label rather than the nameplate maximum.
For laundry and dishwashing, the right comparison is eco cycle versus convenience cycle, because duration and temperature move the result more than the headline wattage.
Eco and quick cycles can differ more in drying time than in washing cost.
For this appliance, the runtime pattern and the purpose of use matter more than the static wattage figure.
How this example is calculated
Energy equals watts ÷ 1,000 × hours used. The headline uses 27p/kWh and excludes the daily standing charge.
Last reviewed: 1 September 2026 · Ofgem: Energy price cap ↗
Results are estimates for planning and are not personal financial advice.
Why results differ
Programmatic pages use fixed example assumptions, so a different salary, rate, term, tariff or property value changes the output. Fees, eligibility checks, product rules and legal thresholds may not be fully modelled on this example page. Use the main calculator and official source links if you need a result for a decision.
Why the result can differ
Programmatic pages use fixed example assumptions, so a different salary, rate, term, tariff or property value changes the output.
Fees, eligibility checks, product rules and legal thresholds may not be fully modelled on this example page.
Use the main calculator and official source links if you need a result for a decision.
Frequently asked questions
Will every model cost the same?
No. Rated power, cycle length and efficiency differ by model and programme.
Is the standing charge included?
No. This example measures the appliance's incremental unit-rate cost.