About
About Hours Calculator
Hours Calculator is a focused Mycelgrid app for measuring one Start-to-End clock interval with an optional break.
What it calculates
The app converts Start and End to integer minutes, applies a next-day overnight convention when End is earlier than Start, subtracts an optional whole-minute break, and reports hours/minutes, decimal hours, and total minutes.
What stays separate
Time Calculator adds and subtracts durations. Time Card Calculator handles a weekly punch ledger. Date/time intervals, time zones, payroll, and overtime remain outside this app.
Local-first calculation
The calculation runs in this page. Entered times are not sent to a calculation server or stored as an app work history.