After logging many clips you'll Batch Capture them. However, it's helpful to know the total duration of all the clips added together so you can make sure that your drive can accommodate that amount of media.
Below are the steps to calculate the total duration of selected clips:
Select all the clips that you want to calculate the duration for. Methods include Shift + clicking to select a range of clips, or going to the Edit menu and choosing the Select-All command.
Right-click on one of the selected Master Clips.
From the menu select Get Bin Info.
The Console window will open.
There will be an entry in the Console that reads Total duration of selected items:. The duration is displayed as Hours:Minutes:Seconds:Frames (refer to the screenshot below).