• Adobe After Effects Expressions

  Convert F Temperature to Centigrade AND round off to 1 decimal place

  Posted by Joseph Urso on January 14, 2016 at 7:06 pm

  I’m trying take a value from a slider control for a Fahrenheit temperature, convert it to Celsius and round it off to 1 decimal place. Converting the temperature is no problem using this formula:

  value = (PICKWHIP TO FARENHEIT SLIDER)-32)*(5/9);

  but it returns 12 decimal places (or none if it is an even number). I’ve tried several expressions from this forum to round off to 1 decimal place, but they always return incorrect math results. Any suggestions on how to proceed?

  Joseph Urso replied 10 years, 4 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  January 14, 2016 at 7:33 pm

  If it’s for a text layer, you could do it like this:

  s = effect(“Slider Control”)(“Slider”);
  ((s-32)*(5/9)).toFixed(1);

  If not, you could try this:

  s = effect(“Slider Control”)(“Slider”);
  Math.round((s-32)*(5/9)*10)/10;

  Dan
• 

  Joseph Urso

  January 15, 2016 at 5:58 am

  The first one worked perfectly. Thank you very much for the help.

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