★ COST COMPARISON · EVERYDAY · COOKING & ENERGY
The pressure cooker saves $26.79 a year at the defaults — but the headline hides a twist. Three meals a week is 156 meals a year. At $0.17 per kWh, the slow cooker at 0.22 kW for 8 hours (1.76 kWh per meal) costs $0.2992 per meal, or $46.68 a year, while the pressure cooker at 1.0 kW for 0.75 hours (0.75 kWh per meal) costs $0.1275 per meal, or $19.89 a year. The pressure cooker also finishes 7.25 clock-hours sooner per meal — 1,131 hours a year — yet it costs about 5 extra active minutes per meal (20 minutes of prep, pressurizing, and release versus 15 minutes for the slow cooker), or 13 hours a year of extra hands-on time. Most of the clock time saved is unattended time, not labor saved. Enter your own meals, power, hours, and electricity rate below. This is energy cost only: it excludes buying either appliance.
A slow cooker sips power for a long time; a pressure cooker gulps power for a short time. The product of power and time decides the energy bill, and here the short, sharp cook wins on energy. But time has two kinds: clock time, which the pressure cooker crushes, and active time — the minutes your hands are actually busy — where the slow cooker quietly wins. This calculator prices both, so the verdict is honest about each.
Energy per meal = power in kW × hours per meal. Cost per meal = energy per meal × electricity rate per kWh. Meals per year = meals per week × 52. Annual energy cost = meals per year × cost per meal, computed from the unrounded per-meal cost and then rounded to cents; the saving is the difference of the two rounded annual costs, matching the convention used across this site. Clock-hours saved per meal = slow cooker hours − pressure cooker hours; clock-hours saved per year = meals per year × that difference. Extra active time assumes 15 active minutes per slow-cooker meal (chop, load, walk away) versus 20 active minutes per pressure-cooker meal (chop, load, seal, wait for pressure, release) — 5 extra minutes per meal, or meals per year × 5 ÷ 60 extra active hours a year. The comparison is energy cost only: it excludes buying either appliance, and it assumes the same meal in both cookers.
Setup: 3 meals a week, slow cooker 0.22 kW × 8 hours, pressure cooker 1.0 kW × 0.75 hours, $0.17 per kWh.
Line 1 — meals per year. 3 × 52 = 156 meals a year.
Line 2 — slow cooker energy per meal. 0.22 × 8 = 1.76 kWh per meal.
Line 3 — slow cooker cost per meal. 1.76 × $0.17 = $0.2992 per meal.
Line 4 — slow cooker annual energy cost. 156 × $0.2992 = $46.68 a year.
Line 5 — pressure cooker energy per meal. 1.0 × 0.75 = 0.75 kWh per meal.
Line 6 — pressure cooker cost per meal. 0.75 × $0.17 = $0.1275 per meal.
Line 7 — pressure cooker annual energy cost. 156 × $0.1275 = $19.89 a year.
Line 8 — the saving. $46.68 − $19.89 = $26.79 a year.
Line 9 — clock time. 8 − 0.75 = 7.25 clock-hours saved per meal; 156 × 7.25 = 1,131 clock-hours a year.
Line 10 — active time. 20 − 15 = 5 extra active minutes per meal; 156 × 5 ÷ 60 = 13 extra active hours a year.
5 meals a week. 260 meals a year cost $77.79 slow and $33.15 pressure — a $44.64 saving, and 1,885 clock-hours saved.
Electricity at $0.30 per kWh. Each slow meal costs $0.528 and each pressure meal $0.225, so 156 meals cost $82.37 and $35.10 — a $47.27 saving.
A bigger pressure cooker: 1.2 kW for 1 hour. Each pressure meal uses 1.20 kWh and costs $0.204, so 156 meals cost $31.82 a year — and the saving falls to $14.86.
Just 1 meal a week. 52 meals a year cost $15.56 slow and $6.63 pressure — an $8.93 saving, small in dollars but still the same 7.25 clock-hours per meal.
| Output | Formula | What it means |
|---|---|---|
| Slow cooker energy per meal | Slow kW × slow hours | 1.76 kWh at the defaults — low power, long time. |
| Pressure cooker energy per meal | Pressure kW × pressure hours | 0.75 kWh at the defaults — high power, short time. |
| Slow cooker cost per meal | Slow kWh × $/kWh | $0.2992 at the defaults. |
| Pressure cooker cost per meal | Pressure kWh × $/kWh | $0.1275 at the defaults. |
| Slow cooker annual energy cost | Meals per year × cost per meal | $46.68 at the defaults. |
| Pressure cooker annual energy cost | Meals per year × cost per meal | $19.89 at the defaults. |
| Pressure cooker saving | Slow annual cost − pressure annual cost | $26.79 at the defaults — the energy bill kept. |
| Clock-hours saved per meal | Slow hours − pressure hours | 7.25 at the defaults — mostly unattended time. |
| Clock-hours saved per year | Meals per year × clock-hours per meal | 1,131 at the defaults. |
| Extra active hours per year | Meals per year × 5 min ÷ 60 | 13 at the defaults — the honest cost of the speed. |
The energy math is exact for the numbers you enter, but four assumptions deserve daylight. First, the active-time figures (15 versus 20 minutes) are planning estimates, not measurements of your kitchen: your pressure-cooker routine may be faster once it is habit, and your slow-cooker prep may be slower if you brown meat first. Second, the comparison assumes the same meal in both cookers at the stated power and hours; a slow cooker on high for 4 hours uses about half the default energy, and a pressure cooker doing back-to-back batches uses more. Third, this is energy cost only: it excludes buying either appliance, replacement gaskets and seals, and the value of food quality differences (some dishes genuinely taste better slow-cooked). Fourth, slow cookers cycle on and off via thermostat, so treat 0.22 kW as an effective average draw over the whole cook rather than a constant nameplate draw — published slow-cooker figures run roughly 75–200 W with 8-hour cooks at about 1.2–1.6 kWh, and pressure cookers about 0.6–0.9 kWh per session, so the defaults here sit at the top of / inside those ranges. If you have a plug-meter reading for your own cooker, use it: divide your measured kWh per meal by the cooker's hours to get the effective kW, and enter that instead of 0.22. Error policy: missing, non-numeric, or out-of-range inputs (meals per week outside 1–21, non-positive power, hours, or rate) are reported as errors rather than calculated, so no result ever shows NaN.
Bright Side Kit. "Slow Cooker vs Pressure Cooker: Cost & Time Verdict." https://brightoolbox.com/slow-cooker-vs-pressure-cooker/ Accessed October 24, 2026.$46.68 a year at the defaults: 3 meals a week, 0.22 kW for 8 hours, $0.17 per kWh. Each meal uses 1.76 kWh and costs $0.2992, and 156 meals a year add up to $46.68.
$19.89 a year at the defaults: 3 meals a week, 1.0 kW for 0.75 hours, $0.17 per kWh. Each meal uses 0.75 kWh and costs $0.1275, and 156 meals a year add up to $19.89.
$26.79 a year at the defaults. The slow cooker costs $46.68 a year in energy and the pressure cooker $19.89, so the saving is the $26.79 difference. At 5 meals a week the saving rises to $44.64.
It saves 1,131 clock-hours, not 1,131 hours of your labor. Each meal finishes 7.25 clock-hours sooner, but a slow cooker runs unattended — you are not standing over it for those 8 hours. The honest labor difference is about 13 extra active hours a year for the pressure cooker.
Sealing, pressurizing, and releasing. The slow-cooker routine is roughly 15 active minutes (chop, load, walk away); the pressure-cooker routine adds sealing the lid, waiting for pressure, and releasing it — about 20 active minutes, or 5 extra minutes per meal.
The slow cooker costs $77.79 a year and the pressure cooker $33.15 — a $44.64 saving. More meals scale both costs up, and the saving grows with them.
The saving grows to $47.27 a year. At $0.30 per kWh, 156 meals cost $82.37 slow and $35.10 pressure. High-rate households gain most from the pressure cooker.
For batch cooking, all-day unattended cooking, and tough cuts that benefit from a long, gentle cook. If you load it in the morning and eat in the evening with no attention in between, the slow cooker's unattended hours cost you nothing in labor — and the energy gap is only $26.79 a year at the defaults. The companion guide covers exactly when slow wins.