All you need is an oven thermometer with good accuracy – and a Phillips head screwdriver, if your oven has analog controls. … If the oven thermometer shows a reading that is above or below 350 degrees by 15 degrees or more, you will need to calibrate your oven.

Are ovens calibrated?

Every oven model has a calibration process and you can reset your oven so that it is accurate when you cook. Most ovens can be calibrated up or down 30-35 degrees F.

How do I test my oven calibration?

To check the temperature of your oven, set it to 350 degrees, allow it to pre-heat and then place an oven thermometer in the oven. Wait until the thermometer settles on a number, that is the true temperature of your oven. If it is exactly 350 degrees then congratulations! Your oven is correctly calibrated.