Convert AST to GMT — Time Difference Between Atlantic Standard Time and Sao Tome

How to Convert AST to GMT

Drag the slider on the AST timeline to pick your time — the GMT 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 AST and GMT?

Sao Tome (GMT) is 4 hours ahead of Atlantic Standard Time (AST). To convert, add 4 hours — for example, 9:00 AM AST is 1:00 PM GMT.

AST to GMT Quick Reference

AST to GMT Meeting Planner

Use the color-coded table above to find overlapping work hours between Halifax and Sao Tome. 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 AST to GMT 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.