Minutes & Temps
Time your meal

Sweet potato · At 400°F in the oven.45 minutes to 1 h at 400°F

Whole medium sweet potato, skin pierced. A useful starting range, with the details that matter.

°F · oz/lb°C · g/kg

Make it your portion.

One piece or reference portion, rather than total basket load.
Stay within your appliance’s supported temperatures.

Changing the size or temperature gives a modelled estimate. How it works

Typical range

Sweet potato, your setting

45 min to 1 h

at 400°F

Check at 45 min

Based on North Carolina Sweetpotato Commission: cooking methods.

Source entry: Baking Sweetpotatoes. Portion controls describe one piece or planning portion; they are separate from the manufacturer’s total basket load.

From preheat to the final check.

  1. 1

    Preheat

    400°F; follow your appliance instructions.

  2. 2

    Cook

    45 minutes to 1 h; keep pieces evenly spaced.

  3. 3

    Check

    Test the center for tenderness or the stated texture.

  4. 4

    Rest

    No mandatory USDA rest time for this food.

A quick size comparison.

The source reference is marked below. Other rows are modelled estimates at your selected settings.

Sweet potato cooking time by reference size
Reference sizeTypical timeBasis
4.75 oz28-39 minutesModel estimate
9.5 oz45 minutes to 1 hSource reference
19 oz1 h 10 min to 1 h 35 minModel estimate

Same food. Different details.

Air fryer400°FPrint the oven chart

A frozen estimate is not supported for this method. Thaw safely before using the reference range.

A few things worth knowing.

How long does sweet potato take in the oven?

For Whole medium sweet potato, skin pierced, the chart baseline is 45 minutes to 1 h at 400°F. Adjusted sizes and temperatures are modelled estimates.

What makes sweet potato cook faster or slower?

Check the center with a skewer; whole potatoes and cut pieces need different times. Thickness, initial temperature and appliance output also matter. A total basket weight does not describe the thickness of each piece.

Can I cook sweet potato from frozen?

This method has no supported frozen model. Thaw safely first and use the reference shape.

When should I start checking?

Check at 45 minutes for this setting. Keep cooking if the center has not reached the appropriate safety endpoint or texture. A timer is a reminder to check.

How do I know when sweet potato is done?

Check the center for the texture you want. Start checking at the lower end of the range; your appliance and starting temperature can change the result.

Where this range comes from.

Reference facts are compiled from primary charts. Adjusted ranges are planning estimates. Read how we calculate them.