Convert HST to SGT — Time Difference Between Adak and Singapore Time

How to Convert HST to SGT

Drag the slider on the HST timeline to pick your time — the SGT 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 HST and SGT?

Singapore Time (SGT) is 18 hours ahead of Adak (HST). To convert, add 18 hours — for example, 9:00 AM HST is 3:00 AM (next day) SGT.

HST to SGT Quick Reference

HST to SGT Meeting Planner

Use the color-coded table above to find overlapping work hours between Adak and Singapore. 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 HST to SGT 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.