How much does it cost to run a slow cooker?

At 200 watts used 8 hours a day, a slow cooker costs about $0.27 per day, $3.40 per month and $40.80 per year on an average rate of 17¢ per kWh — roughly 240 kWh and 96 kg of CO₂ over a year. Enter your own electricity rate and usage in the calculator above for a figure matched to your bill.

The fundamental appeal of slow cookers lies in their efficiency through patience. Rather than concentrating high heat into a short window, slow cookers distribute modest warmth over an extended period, allowing collagen in tougher cuts of meat to break down and flavors to meld without aggressive boiling. This low-and-slow approach demands far less electrical power than active cooking methods. A typical slow cooker drawing around 200 watts is operating at a fraction of a conventional oven's capacity, yet it delivers fully cooked, tender results because time compensates for temperature. Understanding this trade-off is key to appreciating why slow cookers rank among the cheapest kitchen appliances to operate.

When selecting a slow cooker, capacity and insulation quality matter more than you might expect. A 6-quart model uses roughly the same power as a 3-quart one because both run the same heating element at the same wattage; the larger model simply takes slightly longer to reach temperature. More relevant to running costs is the insulation around the heating element and ceramic pot. Poor insulation forces the heating element to cycle on and off more frequently to maintain temperature, increasing total energy consumption. Thicker ceramic walls and better-sealed lids reduce heat loss and mean the element runs more steadily. When shopping, check for a heavy-bottomed crock and a lid that sits snugly without rattling—these are signs the manufacturer prioritized thermal retention.

Common mistakes with slow cookers inflate their running time and energy use without improving results. Lifting the lid frequently to check progress or stir unnecessarily adds 15 to 20 minutes to cook time each time you do it, as the appliance must reheat the contents back to temperature. Similarly, adding cold ingredients straight from the refrigerator delays cooking and forces more work from the heating element. Many cooks also run slow cookers on the high setting when the low setting would complete the job in the same wall-clock time, wasting power for no practical benefit. The low setting is almost always the more efficient choice; use high only when you genuinely need to finish a meal faster.

The practical cost advantage of slow cookers comes from their role in meal preparation rather than their instantaneous power draw. Because they excel at transforming inexpensive, tough cuts of meat and dried legumes into tender dishes, slow cookers often encourage cooking from scratch rather than reheating prepared foods or ordering takeout. A slow cooker running for 8 hours on low uses far less energy than running a conventional oven for 1.5 hours or leaving your stove on for an hour. Additionally, slow cookers release heat into your kitchen, which in cooler months reduces the burden on your heating system—a secondary benefit not reflected in the electricity meter but real in your overall utility bills.

Newer models sometimes include programmable timers and automatic warm settings that switch the cooker to a lower temperature after a set time, preventing overcooking and allowing you to leave food warming for hours without drying it out. While these features add minimal cost, they also add minimal efficiency gains; a basic slow cooker without these bells and whistles is just as economical to operate. What does matter is whether the appliance has a visible temperature dial or control that lets you confirm you're using the low or high setting as intended. Some manufacturers make the settings ambiguous, leading users to guess which setting they are actually on, which can result in running on high when low would suffice.