Slow cooker vs Pressure cooker / Instant Pot
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
Long workday convenience (set and forget), cheap braising cuts, stews, casseroles.
Quick weeknight cooking, dried pulses (no soaking), stocks in 30 minutes, same results as slow cooker but faster.
| Aspect | Slow cooker | Pressure cooker / Instant Pot |
|---|---|---|
| Typical cooking time | 6-8 hours | 15-45 minutes |
| Temperature | 80-90°C | 115-125°C |
| Nutrient retention | Lower (long heat exposure) | Higher (shorter time) |
| Energy use | ~1-1.5 kWh per use | ~0.5-1 kWh per use |
| Best for | Collagen cuts, all-day cooking | Speed, dried pulses, stock |
Frequently asked
Can I do slow cooker recipes in a pressure cooker?
Yes, with time conversion. 8 hours slow cook ≈ 45-60 minutes pressure cook at high pressure. The texture differs slightly — pressure cooking extracts fat differently. Add less liquid in the pressure cooker (it doesn't evaporate).
Is an Instant Pot worth buying?
An Instant Pot is a combined pressure cooker/slow cooker/rice cooker/sauté pan. If you'd regularly use 3+ of those functions, it's worth the space. For most UK households, a standalone pressure cooker (simpler, cheaper, more durable) is the better choice if you already have a slow cooker.
Frequently asked questions
Can I do slow cooker recipes in a pressure cooker?
Yes, with time conversion. 8 hours slow cook ≈ 45-60 minutes pressure cook at high pressure. The texture differs slightly — pressure cooking extracts fat differently. Add less liquid in the pressure cooker (it doesn't evaporate).
Is an Instant Pot worth buying?
An Instant Pot is a combined pressure cooker/slow cooker/rice cooker/sauté pan. If you'd regularly use 3+ of those functions, it's worth the space. For most UK households, a standalone pressure cooker (simpler, cheaper, more durable) is the better choice if you already have a slow cooker.