🔄 Unit Converters
Time Zone Converter
Convert a date & time between any two world time zones. Supports all IANA time zones.
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Free Online Time Zone Converter
Our free time zone converter helps you instantly convert a date and time from one time zone to another — perfect for scheduling international meetings, coordinating with remote teams, booking travel across time zones, or watching live events happening in another country.
The tool covers all major IANA time zones worldwide and automatically handles daylight saving time (DST) transitions, so you always get the correct current offset — not just a fixed UTC offset that ignores seasonal changes.
🌍 All World Time Zones
Full IANA time zone database — covers every country and region.
🕐 DST Aware
Automatically accounts for daylight saving time changes.
📅 Date + Time
Convert specific dates and times — not just the current moment.
💼 Remote Work Ready
Find the overlap between time zones for scheduling meetings.
Common Time Zone Conversions
- IST (India) = UTC+5:30 — 5.5 hours ahead of GMT
- EST (US East) = UTC-5 (UTC-4 in summer/EDT)
- PST (US West) = UTC-8 (UTC-7 in summer/PDT)
- GMT/UTC (UK) = UTC+0 (UTC+1 in summer/BST)
- CET (Central Europe) = UTC+1 (UTC+2 in summer/CEST)
- SGT (Singapore) = UTC+8 — no DST
- AEST (Sydney) = UTC+10 (UTC+11 in summer/AEDT)
Frequently Asked Questions
What is UTC and how does it relate to GMT?
UTC (Coordinated Universal Time) is the modern international time standard. GMT (Greenwich Mean Time) was the original standard based on solar time at the Royal Observatory in Greenwich, London. For most practical purposes they are equivalent — UTC+0 and GMT are the same. However, UTC is the scientific standard used by all computer systems, while GMT is a time zone that follows daylight saving time in the UK during summer (becoming BST, UTC+1).
What is daylight saving time (DST)?
Daylight saving time is the practice of setting clocks forward by 1 hour during summer months to extend evening daylight. Not all countries observe DST — India, China, Japan, Singapore and most of Africa do not change clocks seasonally. Countries that observe DST (most of Europe, North America, Australia) change their UTC offset by +1 hour during summer, which can shift the time difference between two locations by 1 or 2 hours compared to winter.
When is the best time to schedule a meeting between India and the US?
India (IST, UTC+5:30) and US Eastern time (EST, UTC-5) have a difference of 10.5 hours. US Eastern and India overlap well around 7:30–9:30 AM IST, which is 9–11 PM EST the previous day — workable for late US workers. For US Pacific time (UTC-8), the difference is 13.5 hours making overlap very difficult. Early morning IST (6–8 AM) = late afternoon previous day US Pacific (4:30–6:30 PM).
Why does India have a 30-minute offset (UTC+5:30)?
India chose UTC+5:30 to have a single time zone across the entire country despite its wide geographic span. The 30-minute offset was a compromise to minimise the difference from solar time across the country. Several other countries also use non-whole-hour offsets including Nepal (UTC+5:45), Iran (UTC+3:30) and parts of Australia (UTC+9:30).