How to Calibrate Oven Temperature

If your oven consistently runs hotter or cooler than its dial setting, calibration can fix it without any parts or professional help. Most modern ovens have a built-in calibration function that lets you offset the thermostat by up to 35°C. Here's how to do it.

Step 1: Measure Your Oven's Actual Temperature

Before calibrating, you need to know exactly how far off your oven is running.

1. Place an oven thermometer in the centre of the oven at middle rack level
2. Set the oven to 180°C (350°F) and allow 20 minutes to fully stabilise
3. Read the thermometer — take 3 readings over 10 minutes and average them
4. Calculate the offset: actual temperature minus set temperature = offset

Example: Oven set to 180°C, thermometer reads 165°C → offset is −15°C (oven runs 15°C cold)

The Oven Thermometer 2 Pack (50–300°C / 100–600°F) is essential for this step — accurate measurement is the foundation of successful calibration.

Step 2: Access the Calibration Setting

The calibration method varies by brand and model. Common methods:

Most Modern Electric Ovens (Digital Controls)

1. Press and hold the "Bake" button for 5–8 seconds until a temperature or "CAL" appears on the display
2. Use the up/down arrows to adjust the offset in the direction needed
3. Press "Start" or "Bake" again to confirm and save

GE Ovens

1. Press "Bake" and hold for 5 seconds until the display shows the current calibration offset (e.g. "0" or "+5")
2. Press the up arrow to increase temperature or down arrow to decrease
3. Press "Start" to save

Whirlpool / KitchenAid Ovens

1. Press "Bake" then immediately press and hold "Start" for 5 seconds
2. Adjust using the temperature pad
3. Press "Start" to save

Samsung Ovens

1. Press "Settings" or "Options"
2. Navigate to "Oven Temperature Calibration"
3. Adjust and confirm

Always check your specific oven manual — the exact button sequence varies significantly between models. Search "[your oven brand and model] temperature calibration" for model-specific instructions.

Step 3: Apply the Offset

Enter the offset value you calculated in Step 1:

• If your oven runs 15°C cold: add +15°C to the calibration
• If your oven runs 15°C hot: add −15°C to the calibration

Most ovens allow calibration in increments of 5°C, up to a maximum of ±35°C.

Step 4: Verify the Calibration

1. After saving the calibration, run the oven at 180°C again for 20 minutes
2. Check the thermometer reading
3. If still off, repeat the process with a smaller adjustment
4. Aim for within 5°C of the set temperature

What If My Oven Doesn't Have a Calibration Function?

Older ovens with mechanical thermostats may not have a digital calibration option. In this case:

• Compensate manually: If your oven runs 15°C cold, set it 15°C higher than recipes specify
• Thermostat adjustment screw: Some older ovens have a small adjustment screw on the thermostat knob shaft — consult your manual
• Professional calibration: An appliance engineer can recalibrate or replace the thermostat

How Often Should You Calibrate?

Check your oven's accuracy once a year, or whenever you notice baking results becoming inconsistent. Thermostats drift gradually over time, so annual verification is good practice.

Summary

Measure your oven's actual temperature with a thermometer, calculate the offset, access the calibration setting (usually by holding the Bake button), enter the offset, and verify. Most modern ovens support calibration of up to ±35°C and the process takes under 30 minutes.