Thanks to all who replied re a calculator that could manage durations. In the end, I decided to go for a physical unit, as I dont have access to and dont want to install a spreadsheet application on my work machine.
For anyone who is in need of something similar, I did find a small app called CalcWorks SE which will do the job, but will not accept timecode format without decimals, so, good in a pinch, but not so good if you are used to typing timecode. thanks again :) Jude ___________________________________________________________________ In the beginning there was nothing, which exploded. Terry Pratchett ___________________________________________________________________
