Three numbers. The ones that decide the meeting.
When the world meets at work.
Read the day in both zones.
Crossing the border. Money, language, plugs.
Money changes hands at the border: Colombo uses the LKR (Rs රු) and Houston uses the USD ($). Language shifts too — Sinhala in Colombo, English in Houston. Be careful behind the wheel: Colombo drives on the left, Houston on the right.
- Country
- Sri Lanka
- Capital
- Sri Jayawardenepura Kotte
- Currency
- Sri Lankan rupee (LKR · Rs රු)
- Language
- Sinhala, Tamil
- Calling code
- +94
- Drives on
- Left
- Country
- United States
- Capital
- Washington, D.C.
- Currency
- United States dollar (USD · $)
- Language
- English
- Calling code
- +1
- Drives on
- Right
Quick answers. Before you book the call.
What's the time difference between Colombo and Houston?
Colombo is 10.5 hours behind Houston. Colombo runs on GMT+5:30 and Houston on GMT-5. 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'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 Colombo from Houston?
About 15,904 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 19h 13m, 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 Colombo and Houston use?
Colombo uses the Sri Lankan rupee (LKR, Rs රු); Houston uses the United States dollar (USD, $). 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 Colombo from Houston?
Dial the international prefix used by your carrier (often 011), then +94, 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 Colombo and Houston?
Colombo primarily speaks Sinhala, Tamil; Houston speaks English. English is widely used in business contexts in major cities of both, but written contracts may need translation.
Do Colombo and Houston drive on the same side of the road?
No. Sri Lanka drives on the left, United States on the right. If you're renting, expect a learning curve on the first day — especially at roundabouts and when judging the centre of the lane.