Setting target levels for nutrients relative to total caloric intake

ALiebCRON1

I was wondering if it would be possible to set the target level for some nutrients based upon the day's total caloric intake rather than a static measure in grams, mg, or µg. For example, if I'm trying to limit my saturated fat intake to no more than 10% of my daily caloric consumption, I'd like to use that 10% as my target rather than a static 20g per day, since my total daily caloric intake varies slightly.

MerryMag

I would also like this.