There is no unit of measurement called "Cecilius". It's possible you meant "Celsius", which is a common temperature scale.

To convert Celsius to Fahrenheit, you can use the following formula:

°F = (°C × 9/5) + 32

For example:

* 1 degree Celsius is equal to (1 × 9/5) + 32 = 33.8 degrees Fahrenheit.

If you meant a different unit, please provide more information.