CAT to IST Converter

It takes three quick steps:

1. Click the CAT field on the left and pick the time you want to convert.
2. The matching IST time updates on the right automatically — there’s no button to press.
3. Need a different day? Click the date field and the result follows, rolling over if it crosses midnight.

IST is 3 hours and 30 minutes ahead of CAT. In everyday terms, once you know the time on one side you just add 3 hours 30 min to get the other — so a call between Harare and Mumbai is always 3 hours 30 min apart.

Right now the time in India Standard Time (IST) is Monday, June 29, 2026 · 11:24:00 PM. It ticks every second, so you’re always looking at the live IST clock.

And in Central Africa Time (CAT), it’s currently Monday, June 29, 2026 · 7:54:00 PM. Compare the two and the 3 hours 30 min gap is easy to see.

For example, a 9:00 AM CAT meeting takes place at 12:30 PM IST. The trick is to aim for a slot that lands inside normal working hours on both sides. Once you’ve found a time, hit Share on the converter to copy a link with the time built in — easy to send to a colleague. Juggling three or more zones? The meeting planner highlights the hours that overlap for everyone.

The labels CAT and IST are fixed offsets, so the result on this page is always exact. Neither side changes its clocks for daylight saving, so the difference you see here is the same in summer and winter.

We don’t guess. CAT and IST times are worked out from the official IANA time zone database, the trusted standard that operating systems use worldwide. Because daylight-saving rules and regional offsets do change over time, we track those updates rather than relying on a fixed number — which is exactly where many converters slip up.