Google Time Converter Calculator

https://www.onlineconversion.com/lead_time.htm

Calculate Lead Time. Start Date: (month/day/year format) (day/month/year format) (year/month/day format) Add this much time: Days Weeks Months Years End Date will be: The date is calculated in the following order: Year, Month, Week, then Day. BookMark Us. It may come in handy. Are you bored? Try the Fun Stuff. Was this site helpful?

https://latenitefilms.com/blog/calculating-timecode-in-google-sheets/

What’s REALLY exciting though, is that the incredibly clever Stockholm-based Henrik Cednert has put together an awesome script (inspired by Nuke/Hiero Timecode Calculator) that allows you to calculate timecode within a Google Sheets document. It’s early days, and the code does not currently support obscure non-even frame rates (i.e. 23

https://support.google.com/docs/answer/3267350?hl=en

The string of text used in time_string should be within quotations and represent time using either the 12-hour or 24-hour time format, for example "2:15 PM" or "14:15". Returns a number between 0 (inclusive) and 1 (exclusive). Zero corresponds to 12:00:00 AM and 0.9999884259 corresponds to 11:59:59 PM.

https://sheetsformarketers.com/how-to-calculate-time-in-google-sheets/

Step 1. First we need to understand how times are stored in Google Sheets. All time calculations are done based on days in Google Sheets, so behind the scenes an hour is 1/24, 12 hours is 1/2 and a full day is 1. If we simply change the number formatting to decimal formatting for a duration, it will display as a fraction of a day, not a number