Slow cooker vs electric oven: what does a meal cost?
A slow cooker can use less electricity for a meal, but the answer depends on cooking time, power and how many portions you make. Compare energy for the whole session, including oven preheat, and apply the same electricity price to both appliances.
Content checked 2026-09-27 · Rates published 2026-09-24 · Texas reference location · 2026-07-ytd
Three transparent cooking scenarios
These assumed sessions illustrate the calculation; they are not measured appliances, equivalent recipe instructions or food-safety guidance. Follow your recipe and manufacturer instructions.
| Session | Assumptions | kWh/session | Estimated/session |
|---|---|---|---|
| Slow cooker: low, 8 hours | Illustrative 180 W × 8 h × 80% duty | 1.1520 | $0.19 Range $0.12–$0.27 |
| Slow cooker: high, 4 hours | Illustrative 280 W × 4 h × 85% duty | 0.9520 | $0.15 Range $0.10–$0.23 |
| Electric oven: 1-hour session | Illustrative 2,400 W × 1 h × 60% duty, including preheat | 1.4400 | $0.23 Range $0.15–$0.34 |
For these inputs, the eight-hour low session uses 1.152 kWh, the four-hour high session 0.952 kWh, and the oven session 1.440 kWh. Changing the recipe, thermostat behavior or preheat time can change the ordering. Costs above are generated by the same engine as the calculator.
Compare portions, not just sessions
Divide total session energy by the number of portions. A full oven cooking multiple dishes can spread its electricity over more food. Do not assume an eight-hour slow-cooker recipe and a one-hour oven recipe produce identical results.
Check your own cooking energy
Use kWh measured over a complete cooking session if you have a suitable meter and the appliance instructions allow it. Otherwise, use the label watts and an explicit runtime/cycling assumption: kWh = watts ÷ 1,000 × hours × duty cycle. Gas ovens require a different fuel model.
Adjust slow cooker inputs · Adjust electric oven inputs · Compare stovetop cooking
Electricity source: EIA Table 5.6.B · Formula and uncertainty · Editorial checks