As far as I know, the conversion forCelsius to Fahrenheit
is:
F=1.8C+32
Therefore if we substitute 15 degrees Celsius into the formula
we get:
F=(1.8x15)+32
F=59
Therefore 15 degrees Celsius is 59 degrees Fahrenheit.
For a rough conversion you can do 'F=2C+30'.
Iban S