Find the best shared slot in the date and time meeting planner.
edttocst tools
Calculators
Free online calculators for everyday time math—work hours, time cards, shifts, weekly totals, and more. New calculators will appear here as we ship them.
Time Calculator
Add hours and minutes, shift time with lunch, weekly timesheet totals, cycle time, average duration, expressions, and date & time math.
Available nowTime Card Calculator
Free weekly or bi-weekly employee time cards with lunch, breaks, overtime, holiday pay, decimal hours, print & CSV.
Available nowTime Duration Calculator
Hours and minutes between times or dates, 24h / military clock, lunch and breaks, multiple intervals, and work time duration.
Available nowWork Hours Calculator
Daily, weekly, biweekly and monthly hours with lunch, overtime, pay estimates, rounding, and add-up totals.
Available nowSleep Calculator
Bedtime and wake-up times from 90-minute sleep cycles, age hours for kids and teens, power naps, travel, and a quality quiz.
Also on edttocst
Need time zones instead of duration math? Try these tools.
For live city times while you convert, open the world clock est.
Quick Eastern to Central math starts at the edt to cst converter.