Archives: Time Calculation Guides

Convert units in either direction using a table, exact totals and mixed-unit remainders.

Translate 12-hour and 24-hour clock labels and handle noon and midnight.

Interpret a time-looking value as elapsed quantity, clock reading or decimal number using context.

Roll up precomputed task durations by project and audit a period total.

Build a row-wise shift calculation from date/time endpoints, with optional break and weekly total.

Build and format a Sheets work log with timestamp and break validation.

Choose elapsed days or inclusive date count and reproduce both methods.

Count working weekdays in a defined range and optionally remove listed holidays.

Find the mean of unequal durations and define how missing records and rounding are handled.

Apply Gregorian century exceptions and verify date-difference edge cases.