keepcalculator

Drawer 02

Days and Time calculators

Durations in hours, minutes and seconds, hours worked per week, and counts of days. Decimal hours and clock time are kept apart on every page.

Cards in this drawer
2
Typical formula
1 d = 86,400 s
Photo collage: a brass pocket watch, a sand hourglass and a plain blank paper desk calendar with no printing.

Front of the drawer

No. 02·0017Hour, Minute and Second CalculatorTotal seconds9,930 sTurn hours, minutes and seconds into total seconds, total minutes and decimal hours. No. 02·0018Hours per Week Calculator with Lunch BreakHours worked per day8.00 hWork out paid hours per day and per week after an unpaid lunch break.

Every card in Days and Time

CalculatorWorks outExample result
Hour, Minute and Second CalculatorTotal seconds9,930 s
Hours per Week Calculator with Lunch BreakHours worked per day8.00 h

Every calculator uses a standard formula and shows it. How the calculators work.