Calculated Industries 9430 ScheduleCalc Day Date Time (12/24hr) and Calendar Math Calculator for Schedulers, Production Planners and Contract Admins; Includes Stopwatch, Timer, Alarm and Elapsed Time Function MASTER TIME ON DAILY WEEKLY MONTHLY BASIS  add, subtract, multiply and divide time and date units for timecards, scheduling, forecasting and more SIMPLIFIES CONFUSING TIME MATH  lets you work in and convert between hours, minutes, seconds, h:m:s, in both 12hr AM/PM or military 24hr clocks SOLVES DAY DATE CALENDAR MATH AT A GLANCE  planners and schedulers of all types can work in days, weeks, months, years -- even work days and work weeks STOPWATCH AND TIMER BUILT IN  count down or up to time events, processes and do elapsed time calculations with ease; includes optional alarm buzzer HELPS ANY PLANNING PROFESSIONAL  in production, transportation, projects, teachers, military, events, correctional, payroll, pilots, truckers, etc