About 5 or 6 years ago I found a get timecode calculator for the mac called TC Cal. It was a free utility and great for adding and subtracting timecode as well as converting timecode to frames and vice versa. I was very sad when the author took down his website. Recently I was in need of a timecode calculator and was not at my personal computer. I found a new timecode calculator on apple’s website called Timecode Calculator.