When the world meets at work.
Read the day in both zones.
If it's this in Houston, it's that in Kolkata.
When it's 8:00 am in Houston, it's 6:30 pm in Kolkata — evening there, the same day.
When it's 10:00 am in Houston, it's 8:30 pm in Kolkata — evening there, the same day.
When it's 12:00 pm in Houston, it's 10:30 pm in Kolkata — night there, the same day.
When it's 3:00 pm in Houston, it's 1:30 am in Kolkata — late night there, the next day.
When it's 5:00 pm in Houston, it's 3:30 am in Kolkata — late night there, the next day.
When it's 9:00 pm in Houston, it's 7:30 am in Kolkata — morning there, the next day.
Crossing the border. Money, language, plugs.
Money changes hands at the border: Houston uses the USD ($) and Kolkata uses the INR (₹). Conversations can stay in English, which is official in both countries. Be careful behind the wheel: Houston drives on the right, Kolkata on the left.
- Country
- United States
- Capital
- Washington, D.C.
- Currency
- United States dollar (USD · $)
- Language
- English
- Calling code
- +1
- Drives on
- Right
- Country
- India
- Capital
- New Delhi
- Currency
- Indian rupee (INR · ₹)
- Language
- English, Hindi, Tamil
- Calling code
- +91
- Drives on
- Left
Quick answers. Before you book the call.
What's the time difference between Houston and Kolkata?
Houston is 10.5 hours ahead of Kolkata. Houston runs on GMT-5 and Kolkata on GMT+5:30. The gap can shift by an hour when either side enters or leaves daylight saving — the live clocks above always reflect the current offset.
When it's 10 am in Houston, what time is it in Kolkata?
10:00 am in Houston is 8:30 pm in Kolkata on the same day — evening there. The same shift applies to any hour; the quick-conversion cards and the 24-hour table above cover the full day.
When it's 3 pm in Houston, what time is it in Kolkata?
3:00 pm in Houston is 1:30 am in Kolkata the next day — late night there. The same shift applies to any hour; the quick-conversion cards and the 24-hour table above cover the full day.
When's the best time to schedule a meeting?
Standard 09:00–17:00 workdays don't intersect. Most teams compromise with one side meeting early (before 09:00) or late (after 17:00).
Does daylight saving time change the difference?
Yes, if either city observes DST. When one side shifts and the other doesn't, the gap changes by one hour. The DST badges under each clock show whether each zone is currently shifted and when the next transition lands.
How far is Houston from Kolkata?
About 14,182 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 17h 11m, not counting airport time, winds, or routing around restricted airspace.
Can I send this meeting time as a calendar invite?
Yes. Pick a time on the slider above, open the meeting card, customize the title and duration, then download the .ics file. It imports cleanly into Google Calendar, Outlook, and Apple Calendar with the correct timezone attached.
What currency do Houston and Kolkata use?
Houston uses the United States dollar (USD, $); Kolkata uses the Indian rupee (INR, ₹). Check the live rate before transferring money or paying with a card abroad — most banks add a 1–3 % FX margin on top of the mid-market rate.
How do I call Houston from Kolkata?
Dial the international prefix used by your carrier (often 00), then +1, then the local number — drop any leading zero of the city or mobile code. For free calls, WhatsApp, Signal, and FaceTime work over Wi-Fi regardless of country code.
What language is spoken in Houston and Kolkata?
Both United States and India count English among their official languages, so business meetings often skip translation. Houston also has no other official tongue; Kolkata adds Hindi, Tamil.
Do Houston and Kolkata drive on the same side of the road?
No. United States drives on the right, India on the left. If you're renting, expect a learning curve on the first day — especially at roundabouts and when judging the centre of the lane.