Time Difference: Kolkata vs Washington DC
Kolkata
12:09:01 PM IST
Sunday, April 5, 2026
9h 30m
9h 30m
Washington DC
2:39:01 AM EDT
Sunday, April 5, 2026
Washington DC is 9.5 hours behind Kolkata.
Quick Reference
- Kolkata
- IST (GMT+5:30)
No Daylight Saving Time
- Washington DC
- EDT (GMT-4)
EST starts on Nov 1, 2026
Frequently Asked Questions
- What is the time difference between Kolkata and Washington DC?
- Washington DC is 9.5 hours behind Kolkata.
- When is the best time to call from Kolkata to Washington DC?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Kolkata uses IST and Washington DC uses EDT.