170C to Fahrenheit Oven (Conversion Chart)

A 170°C oven setting equals 338°F exactly. If your oven uses Fahrenheit, choose 338°F when available, or 340°F on a dial with ten-degree steps. The chart below covers nearby conversions, and the guide explains how to check oven temperature, confirm cookware limits, and avoid common temperature-related mistakes.

“No one is born a great cook, one learns by doing.” — Julia Child

Converting an oven setting is simple; knowing what the number does and does not tell you is just as useful. The setting is a target for the oven, not a promise that every spot inside will stay at exactly that temperature. I use the conversion first, then check the recipe, the oven, and any cookware instructions before cooking.

Celsius to Fahrenheit oven conversion chart

This chart gives Fahrenheit equivalents for common Celsius oven settings. The conversion uses the standard formula, °F = (°C × 9/5) + 32. For 170°C, the calculation is (170 × 9/5) + 32, which equals 338°F.

The exact conversion is 338°F. If your oven has a digital control that accepts single-degree entries, set it to 338°F. If it displays only steps of five or ten degrees, use the nearest available setting. A 340°F setting is two degrees above the conversion, while 335°F is three degrees below it.

Some recipes use rounded conversions. A recipe that says 170°C may list 340°F as a practical equivalent. That is a small rounding difference, not a different cooking method. Follow the temperature and timing instructions as written, and use the recipe’s doneness cues rather than adjusting the time based on the conversion alone.

Choosing the right Fahrenheit setting

The right setting is the closest useful equivalent your oven can provide. Use 338°F when available, or 340°F on a dial marked in ten-degree steps. Keep the original recipe’s cooking time as a starting point, since food size, pan material, and oven behavior all affect how quickly a dish cooks.

If your oven uses Celsius, set it to 170°C directly. If it uses Fahrenheit, check the control increments before choosing a number. A marked dial may not show every temperature, and the pointer can make small differences hard to judge. In that case, use the closest labeled setting rather than trying to estimate an exact mark.

An oven’s thermostat switches heating on and off to maintain a target range. This cycling can cause temperature changes during cooking, so a reading taken at one moment may not match the oven’s average temperature. If you need to check how your oven is performing, place an oven thermometer inside and let it register during normal preheating and cooking.

Do not change a recipe’s cooking time just because 338°F has been rounded to 340°F. Instead, start with the stated time and check the food using the recipe’s cues. These may include browning, texture, or a food thermometer reading. The oven setting alone cannot confirm the internal temperature of the food.

Material setup and oven preparation for 170°C/338°F

Before placing cookware in the oven, confirm that the full item is rated for at least 338°F. Check the vessel, handles, lid, and any coating or parts made from another material. A pan body may tolerate the heat while a lid knob or handle does not.

Material names alone do not prove that every item is safe at a particular temperature. For example, “tri-ply” describes a layered construction, not a universal oven rating. A product’s stated limit matters, especially when it has a coating, a lid, or a handle made from a different material.

Induction compatibility is a separate question from oven safety. Induction cooktops need a magnetic base to work, but that fact does not determine whether cookware is oven-safe. Check the manufacturer’s instructions for both uses.

Before preheating, position the oven rack where the recipe calls for it. Then set the oven to 170°C or its closest Fahrenheit equivalent. If you are checking the oven with a thermometer, place it where it can be read without touching the oven walls or heating element. Follow the thermometer maker’s directions.

Cooking technique and execution at 338°F

A correct setting helps you follow a recipe, but it does not guarantee a particular cooking time or internal food temperature. Food depth, cookware material, and oven behavior can change how quickly food heats. Use the recipe’s timing as a guide, then check the food using its stated doneness cues.

Once the oven has reached its set temperature, place the dish on the prepared rack. Avoid opening the door more than needed, since doing so lets heat escape and can affect the oven’s temperature. Follow the recipe for cooking time, and check earlier only if the recipe or the size of your food calls for it.

An oven thermometer can help you spot a gap between the displayed setting and the temperature inside the oven. Thermostats cycle, so readings may move above and below the target. A single reading is not enough to show how the oven behaves over an entire cooking period; take readings in a consistent way and interpret them with the thermometer’s instructions.

Oven temperature is not the same as the food’s internal temperature. If a recipe gives a safe internal temperature, use a food thermometer and follow that instruction. If it gives visual or texture cues instead, check those as directed. Do not infer doneness from the 338°F setting alone.

Cleaning, seasoning, and cookware care

Let hot cookware cool gradually on a dry, heat-safe surface before washing. A sudden temperature change can damage some materials: cold water poured into hot glass or ceramic may cause thermal shock, which can lead to cracking. Abrupt cooling can also stress metal cookware.

For cast iron or carbon steel, clean and dry the pan promptly. If needed, apply a thin film of oil to help maintain the seasoned surface. Follow the maker’s care instructions, since recommended cleaning methods can vary by product and finish.

For PTFE or ceramic-coated cookware, use nonabrasive utensils and follow the product’s cleaning directions. Avoid metal scouring pads and abrasive cleaners on these coatings, which can damage their surfaces. Do not assume that a method suitable for bare metal is also suitable for a coated pan.

If you plan to deglaze metal cookware on the stovetop after oven cooking, first confirm that the manufacturer permits stovetop use. Add liquid cautiously: hot cookware can make liquid bubble or splash. This step is optional and is not needed for every recipe.

Serving and dining presentation

A pan can remain hot after it leaves the oven, so choose a dry, heat-safe surface for setting it down. If you are unsure whether the cookware is suitable for serving, transfer the food to a serving dish. Let others know that handles may still be hot.

Use a dry trivet that can support the cookware, and keep the hot vessel away from cold or wet surfaces, particularly if it is glass or ceramic. These precautions help avoid sudden temperature changes and protect the table or counter. Follow any extra handling directions supplied with the cookware.

Conclusion: using the conversion with confidence

The direct conversion is 170°C to 338°F. When your oven cannot show 338°F, 340°F is a close practical choice. Confirm the limits of the complete cookware item, preheat as directed, and judge the food by the recipe’s timing and doneness cues rather than by the setting alone.

For a reliable routine, write down the conversion, check the oven’s controls, and look up the cookware rating before cooking. If an oven thermometer shows repeated differences from the target, use its readings to better understand your oven rather than changing recipe times without checking the food.

Frequently asked questions

These answers cover common questions about converting a Celsius oven setting to Fahrenheit. The key number is 338°F, with 340°F a practical rounded choice on many dials. For cookware, the manufacturer’s stated temperature limit takes priority over a general material description.

What is 170°C in Fahrenheit for an oven?
170°C equals 338°F. If your oven does not offer 338°F, choose the closest available setting, often 340°F.

Should I set my oven to 338°F or 340°F?
Use 338°F if your oven accepts it. On a dial with ten-degree steps, 340°F is the closest setting.

Is 340°F the same as 170°C?
Not exactly. 170°C converts to 338°F; 340°F is a practical rounding that is two degrees higher.

What is the formula for converting Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5, then add 32. For 170°C, that gives 338°F.

Do I need to change the recipe’s cooking time when using 340°F?
Not automatically. Start with the recipe’s stated time and check the food using its doneness cues.

Can I use any pan at 338°F?
No. Check the oven rating for the whole item, including handles, lids, and coatings. Follow the maker’s instructions.

Is PTFE cookware safe at 338°F?
Some PTFE products are labeled for use up to 500°F/260°C, but limits differ. Use only the temperature rating stated for your cookware.

Does 170°C mean the food reaches 170°C?
No. That is the oven setting, not the food’s internal temperature. Check the food as the recipe directs.

Can I put hot glass bakeware on a cold counter?
Avoid sudden temperature changes. Follow the maker’s directions and set hot glass bakeware on a dry, heat-safe surface.

How can I check whether my oven reaches 338°F?
Use an oven thermometer according to its instructions. Oven temperatures can cycle, so one reading may not describe the full cooking period.

(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)