GMT to IST Converter

The gap between UK time and India Standard Time isn't fixed the way most people assume. In winter, when the UK runs on true GMT (UTC+0), India sits exactly 5 hours and 30 minutes ahead. But for roughly seven months of the year the UK moves its clocks forward for British Summer Time (UTC+1), which shrinks that gap to just 4 hours and 30 minutes — even though IST itself never changes, since India doesn't observe Daylight Saving Time at all.

That seasonal shift is exactly what trips people up when they mentally add "5 and a half hours" year-round. The converter above reads the real UK timezone rules for the date you enter, so it automatically knows whether British Summer Time applies and adjusts the result accordingly. Enter a UK date and time, keep IST as the target, and you'll get the correct India time immediately — useful for coordinating a call, a flight, or a deadline between London and Mumbai, Delhi, or Bangalore.