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Global ClockTime zone converter & meeting planner
PAGES
SETTINGS
Clock
Working hours
Start
09
End
18
Theme

AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

IST to EST

IST is UTC+5:30 and EST is UTC−4 today — EST is 9½ hours behind IST. Abbreviations are for reading: this page resolves IST to Asia/Kolkata and EST to America/New_York, which are the names that do not go ambiguous.

IST: India — Irish and Israel Standard Time share the letters. EST: US Eastern; Eastern Daylight Time in summer.

The working day, side by side

The working days do not meet at all. Current abbreviations: IST and EDT.

IST and EST hour by hour, with the working-hour overlap shaded
City00:00 in IST01:00 in IST02:00 in IST03:00 in IST04:00 in IST05:00 in IST06:00 in IST07:00 in IST08:00 in IST09:00 in IST10:00 in IST11:00 in IST12:00 in IST13:00 in IST14:00 in IST15:00 in IST16:00 in IST17:00 in IST18:00 in IST19:00 in IST20:00 in IST21:00 in IST22:00 in IST23:00 in IST
IST——000102030405060708091011121314151617181920212223
EST——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with IST and EST

Open in the PlannerAdd more cities or zones, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep IST, EST and other zones on screen as live clocks, under an animated sky and sun.

Common questions

What is IST in EST?

EST is 9½ hours behind IST today: noon in IST is 02:30 in EST.

Is IST the same all year?

India — Irish and Israel Standard Time share the letters. An abbreviation describes an offset at a moment, not a place — the zone identifier Asia/Kolkata is the unambiguous name.

When can IST and EST meet?

They do not overlap during working hours. 17:00–18:00 your time (08:00 there) is the cheapest compromise.

IST converted to other zones