A typical slow cooker costs roughly $0.26 to run for an 8-hour cook, making it one of the most budget-friendly ways to prepare a hot meal.
If you’ve ever watched your oven preheat and wondered about the meter spinning, the economics of a slow cooker are refreshingly simple. Your dinner costs pennies in electricity. For most U.S. households, the question of how economical is a slow cooker comes down to a few watts, a few hours, and your local electricity rate. The short version: it’s far cheaper than roasting in the oven, but the comparison gets more interesting against other cooktops.
How Much Power Does a Slow Cooker Use?
Slow cookers are low-draw appliances. Most models pull between 75 and 300 watts, with many popular sizes hovering around 150 to 210 watts on the low setting. Settings matter: the low setting on a 6-quart model might draw about 200 watts, while high can push that closer to 300 watts.
The wattage scales with the pot. A small 1.5-quart model sips power, while a large 6-quart cooker uses more to heat a bigger ceramic vessel. The trade-off is worth noting: a bigger cooker costs a bit more per hour but handles a full family meal in one go.
Here’s the catch that trips people up: wattage alone doesn’t tell the story. A 300-watt slow cooker running for 4 hours uses 1.2 kWh; a 150-watt model running for 8 hours also uses 1.2 kWh. Total energy is what you pay for, so the duration matters as much as the draw.
What Does an 8-Hour Cook Cost?
At the U.S. average electricity rate of about $0.16 per kilowatt-hour, the math works out cleanly. A typical 200-watt slow cooker used for 8 hours consumes 1.6 kWh. Multiply that by $0.16, and you get about $0.26 for a full day’s dinner. Some sources put the 8-hour figure as low as $0.16, depending on wattage and local rates.
Per hour, that’s roughly 1.3 to 3 cents, depending on the model and your electricity price. The exact number shifts with your rate, but the scale is what matters: we’re talking about a daily cost measured in cents, not dollars.
That efficiency stacks up fast. Either way, the annual cost of daily slow cooking stays under what you’d spend on a single restaurant appetizer.
How It Compares to Ovens and Cooktops
The most dramatic savings come when you compare a slow cooker to a conventional oven. A typical oven draws 2,000 to 5,000 watts to maintain temperature, and one energy comparison found a slow cooker uses about 10 times less energy to cook the same meal. For a pot roast that would otherwise run the oven for 3 hours, the savings are substantial.
Against other cooktops, the picture is more balanced. Induction is highly efficient because it heats the pan directly, while gas prices in some regions undercut electric rates.
When you’re ready to put that efficiency to work, our roundup of the best affordable slow cooker picks covers models that balance price with performance.
How to Calculate Your Own Cost
You don’t need to trust a generic estimate. The standard formula is simple: (wattage ÷ 1000) × hours used × electricity unit rate = cost. Wattage is usually printed on the bottom of the unit or in the manual.
Worked example: your cooker draws 200 watts. Divide by 1000 to get 0.2 kW. Multiply by 8 hours for 1.6 kWh. Multiply by your rate — say $0.16 — and you land on $0.256, or about 26 cents. Adjust the rate to your local tariff and the hours to your recipe, and the equation gives you your exact number.
That formula also highlights the common mistake: comparing only wattage without accounting for cook duration. A lower-wattage appliance can still cost more if it runs much longer. Always compare total energy, not just the draw.
FAQs
Is a slow cooker cheaper than an air fryer?
Both are efficient, but they serve different purposes. An air fryer heats a small chamber quickly and cooks faster, which keeps total energy low despite a higher wattage draw. A slow cooker uses less power but runs for hours. For long unattended cooks, the slow cooker wins; for quick meals, the air fryer often comes out ahead on total energy.
Does the size of the slow cooker change the cost?
Yes. Larger models like a 6-quart cooker generally draw more watts to heat a bigger ceramic pot, so they cost slightly more per hour. A small 1.5-quart model uses less power. The difference is modest, so pick the size that fits your cooking needs rather than optimizing purely for energy.
Is it cheaper to use a slow cooker or a microwave?
A microwave is typically cheaper for short cooking tasks because it runs for minutes, not hours. Microwaves draw 600 to 1,200 watts but only run briefly. A slow cooker’s advantage is bulk cooking and unattended operation. For reheating leftovers, the microwave wins; for a full meal that cooks while you work, the slow cooker is the better value.
References & Sources
- CNET. “This Appliance Uses 10 Times Less Energy to Cook Than Your Oven.” Supports the energy comparison between slow cookers and ovens.
- British Heart Foundation. “Are Slow Cookers Cheap to Run?” Confirms cost comparison against ovens, induction hobs, and gas hobs.
- Daily Express. “Slow Cooker vs Oven Costs.” Provides typical wattage ranges and per-hour cost estimates.