The short answer: From India (IST, UTC+5:30), US Eastern Time is 9.5 hours behind you during US daylight saving (10.5 in winter). The easiest time to call the USA from India is your evening: around 6:00–9:00 PM IST, which is roughly 8:30–11:30 AM US Eastern — the start of their working day. For the West Coast, aim for 8:30–10:30 PM IST (about 8:00–10:00 AM Pacific).
India and the United States sit almost exactly half a world apart, so there is no hour that is mid-afternoon in both places. The good news is that the same offset that rules out daytime-to-daytime calls makes your evening to America's morning a reliable, comfortable window.
How far behind India is the US?
India keeps a single time zone, India Standard Time, at UTC+5:30, and it does not change for daylight saving. The US does, so the gap depends on the season and which US coast you are calling.
| US zone you're calling | Behind you (US summer) | Behind you (US winter) |
|---|---|---|
| Eastern (ET) | 9.5 hours | 10.5 hours |
| Pacific (PT) | 12.5 hours | 13.5 hours |
The best windows to call
Because the US is behind, your evening is their morning. Aim for the start of the American working day, which is a comfortable after-work hour for you in India.
| Calling at (IST) | In US Eastern | In US Pacific |
|---|---|---|
| 6:00 PM | 8:30 AM | 5:30 AM |
| 7:30 PM | 10:00 AM | 7:00 AM |
| 9:00 PM | 11:30 AM | 8:30 AM |
| 10:30 PM | 1:00 PM | 10:00 AM |
These conversions use US daylight saving (mid-March to early November). In US winter, the same India evening lands one hour earlier in the US morning. For the West Coast specifically, the sweet spot is later in your night: 8:30–10:30 PM IST reaches about 8:00–10:00 AM Pacific.
For a business call vs a personal call
For a work call, the cleanest overlap is your early evening against America's morning. Around 6:30 PM IST is 9:00 AM on the US East Coast, just as colleagues settle in. If you need the West Coast, push to 9:00–10:30 PM IST so you catch the start of their day rather than the middle of their night.
For a personal call to family or friends, the same evening-to-morning window is ideal: 7 PM your time is a relaxed weekday morning in the US, before the day fills up.
India never changes its clocks, but the US springs forward in March and falls back in November, so the gap moves by an hour. A recurring call set in US summer will land an hour off in winter unless you adjust it. See our guide to the USA to India time difference.
Stop checking this every time
If you call or meet the US regularly, doing this arithmetic by hand gets old fast, and it's exactly where the daylight-saving mistakes creep in. Atlas keeps your city and the US side by side in your Mac menu bar, shades the hours when both sides are awake, and writes any meeting to your calendar in both local times. One glance tells you whether now is a good time to call. Calling the other way? See the best time to call India from the USA.
Frequently asked
How many hours behind India is the USA?
What is the best time to call the USA from India?
Does the USA observe daylight saving time?
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