How long to cook sweet potatoes
Choose a method and size for a practical estimate; cooking times are ranges, not a substitute for checking doneness. How we calculate times.
Calculator
Estimated cooking time
29–34 min
Evidence-informed estimate · Cooking times vary — follow the food-specific completion and food-safety guidance.
- Times assume the food starts refrigerated, not room temperature.
Sweet potatoes by method
At typical settings. Boil is fastest at 29–34 min.
| Method | Typical time | Temp |
|---|---|---|
| Boil | 29–34 min | |
| Oven | 51–59 min | |
| Air fryer | 39–46 min |
Sweet potatoes cooking time by size
| Size | Approximate | Time |
|---|---|---|
| Cubed (3 cm) | For mash or roasting | 16–19 min |
| Medium whole | ≈200 g | 29–34 min |
| Large whole | ≈350 g, for baking | 41–49 min |
How to know when it's done
Test with the tip of a sharp knife or a fork — it should slide in with little resistance. sweet potatoes keep cooking slightly after they leave the heat, so check a minute early.
Food-level cooking reference: BBC Good Food — How to cook sweet potatoes (checked 2026-08-18). CookCue applies deterministic adjustments; food-safety guidance is sourced separately.
Frequently asked questions
How long does a whole sweet potato take to bake?
60–75 minutes at 200°C for a large one — fork-tender all the way through. Cubes roast in 30–35 minutes.