GMT to IST Time Converter

GMT refers to the Europe/London timezone, currently ++1 (GMT+1). IST refers to Asia/Kolkata, currently ++5:30 (GMT+5:30). Timezone abbreviation meanings and offsets are calculated live from the IANA tz database, so Daylight Saving Time is always applied correctly.

Representative cities: London (United Kingdom) for GMT and Delhi (India) for IST.

Key Facts

• GMT (Europe/London): current live offset ++1.
• IST (Asia/Kolkata): current live offset ++5:30.
• Time difference is computed from live IANA tzdb offsets and may shift by one hour during DST transitions.