Convert BST to IRST — Time Difference Between Bangladesh Standard Time and Iran Standard Time

How to Convert BST to IRST

Drag the slider on the BST timeline to pick your time — the IRST time updates instantly. You can also click the time display to type a specific hour or pick one from the 15-minute interval dropdown, and use the date picker to check a different day.

What Is the Time Difference Between BST and IRST?

Iran Standard Time (IRST) is 2:30 hours behind Bangladesh Standard Time (BST). To convert, subtract 2:30 hours — for example, 9:00 AM BST is 6:30 AM IRST.

BST to IRST Quick Reference

BST to IRST Meeting Planner

Use the color-coded table above to find overlapping work hours between Dhaka and Tehran. Amber rows mark daytime hours — pick a slot that falls in amber on both sides for a meeting that works for everyone.

Why Trust This BST to IRST Converter?

Timezoney uses the IANA Time Zone Database — the same source that powers your phone and computer — so every conversion handles daylight saving transitions and half-hour offsets automatically.