A mental math heuristic to convert between Fahrenheit and Celsius (opens in new tab)
To convert from Celsius to Fahrenheit, double it and add 30. To do the reverse, subtract 30 and halve it. This is usually pretty close.
Read the original articleTo convert from Celsius to Fahrenheit, double it and add 30. To do the reverse, subtract 30 and halve it. This is usually pretty close.
Read the original article