Potatoes and carrots take about 25 to 45 minutes in the oven, depending on how you cut them and the temperature you use.
When roasted at 400°F (200°C), diced potatoes and carrots usually need around 25 to 35 minutes, while larger chunks can take 40 to 45 minutes.
So if you’ve been wondering how long do potatoes and carrots take in the oven, the honest answer is that it depends on size, temperature, and the texture you’re after.
In this post, we’ll break down exactly how long potatoes and carrots take in the oven, how to prep them, and the best tips for getting them perfectly tender and golden every single time.
How Long Do Potatoes and Carrots Take in the Oven?
Potatoes and carrots take roughly 25 to 45 minutes in the oven at 400°F, and here’s what actually decides the timing:
1. The Size of Your Cuts Matters Most
How long potatoes and carrots take in the oven starts with how you cut them.
Diced into half-inch cubes, both veggies roast in about 25 to 30 minutes.
Cut into one-inch chunks, they’ll need closer to 35 to 40 minutes.
And if you leave potatoes in wedges or carrots whole, expect 45 minutes or more.
2. Oven Temperature Sets the Pace
At 425°F, potatoes and carrots take around 25 to 30 minutes and get beautifully caramelized edges.
At 400°F, that same batch takes about 30 to 40 minutes for a more even, gentle roast.
Drop to 375°F and you’re looking at 40 to 50 minutes, which is great when you’re roasting them alongside a chicken or a bigger protein.
3. Carrots Usually Cook Slightly Faster
Carrots are denser but sweeter, and they tend to soften a touch quicker than potatoes.
When roasted together, cut your carrots a little larger than your potatoes so they finish at the same time.
That one trick solves most of the guesswork around how long potatoes and carrots take in the oven when they share a pan.
4. Parboiling Cuts the Time in Half
If you’re in a hurry, boil the potatoes and carrots for 5 to 7 minutes first.
Drain them, pat them dry, then roast at 425°F for just 15 to 20 minutes.
This is the fastest way to answer the how long do potatoes and carrots take in the oven question when dinner is already running late.
How to Roast Potatoes and Carrots So They Cook Evenly
Getting the timing right is only half the battle.
Here’s how to make sure your potatoes and carrots come out crispy outside and fluffy inside:
1. Cut Them Into Similar Sizes
Uneven pieces are the number one reason one tray of veggies burns while the rest stays raw.
Aim for pieces that are all about the same thickness so everything finishes together.
2. Dry Them Before They Hit the Oil
Moisture is the enemy of browning.
Pat your potatoes and carrots completely dry with a clean towel before tossing them in oil.
The drier they are, the faster they crisp, which shortens how long potatoes and carrots take in the oven.
3. Don’t Crowd the Pan
Spread everything in a single layer with a little space between each piece.
If they’re piled up, they steam instead of roast and the timing goes out the window.
Use two trays if you have to.
4. Flip Them Halfway Through
Give everything a stir or flip at the halfway mark.
This ensures both sides get that golden, caramelized finish.
How to Tell When Potatoes and Carrots Are Done
How long do potatoes and carrots take in the oven isn’t just about the clock, it’s also about the look and feel.
Here’s how to check:
1. The Fork Test
Pierce a piece with a fork or knife.
If it slides in with little resistance, they’re done.
2. Look for Golden Edges
The edges should be browned and slightly crispy, with the centers soft and creamy.
If they look pale, give them another 5 minutes.
3. Watch for Shrinking
Roasted potatoes and carrots shrink a bit as they lose moisture.
When they’ve visibly reduced in size and darkened in color, they’re ready.
So, How Long Do Potatoes and Carrots Take in the Oven?
Potatoes and carrots take about 25 to 45 minutes in the oven at 400°F, depending on how you cut them and how crispy you like them.
Diced pieces finish in 25 to 35 minutes, larger chunks take 40 to 45 minutes, and parboiling first can cut that time down to 20 minutes.
Now that you know exactly how long potatoes and carrots take in the oven, you can roast them with confidence any night of the week.
Happy roasting!