There are so many variables that can affect just how one candle burns, it's impossible to calculate an exact burn time. A container candle will burn hotter as it gets lower, so the hotter the burn the faster the burn time. Even Yankee doesn't give one approximate burn time on any one size candle. For 22 oz., 110-150 hrs. 14.5 oz., 65-90 hrs. 3.7 oz., 25-40 hrs.