HST to UTC

Hawaii Standard Time

Hawaii Standard Time (HST)

HST is 10 hours behind Universal Time (UTC-1)

↑ ↓

Coordinated Universal Time

Coordinated Universal Time (UTC)

UTC is the same time as Universal Time (UTC).

HST to UTC Time Conversion

When it is 12:00 PM in HST, it is 10:00 PM in UTC.

📞There is no overlap during standard 9-to-5 business hours, so a call may need to be early or late in the day for one side.

Time difference between HST and UTC

HST is 10 hours behind UTC.

🕐 Add 10 hours to HST time to get UTC time.

HST uses 10 hours behind Universal Time (UTC-1) and UTC uses the same time as Universal Time (UTC)..

HST to UTC time conversion chart (24 hours)

Highlighted rows are overlapping 9-to-5 business hours – the best time to schedule a call between HST and UTC.

HST Time		UTC Time
12 AM HST Time	↔	10 AM UTC Time
1 AM HST Time	↔	11 AM UTC Time
2 AM HST Time	↔	12 PM UTC Time
3 AM HST Time	↔	1 PM UTC Time
4 AM HST Time	↔	2 PM UTC Time
5 AM HST Time	↔	3 PM UTC Time
6 AM HST Time	↔	4 PM UTC Time
7 AM HST Time	↔	5 PM UTC Time
8 AM HST Time	↔	6 PM UTC Time
9 AM HST Time	↔	7 PM UTC Time
10 AM HST Time	↔	8 PM UTC Time
11 AM HST Time	↔	9 PM UTC Time

HST Time		UTC Time
12 PM HST Time	↔	10 PM UTC Time
1 PM HST Time	↔	11 PM UTC Time
2 PM HST Time	↔	12 AM UTC Time
3 PM HST Time	↔	1 AM UTC Time
4 PM HST Time	↔	2 AM UTC Time
5 PM HST Time	↔	3 AM UTC Time
6 PM HST Time	↔	4 AM UTC Time
7 PM HST Time	↔	5 AM UTC Time
8 PM HST Time	↔	6 AM UTC Time
9 PM HST Time	↔	7 AM UTC Time
10 PM HST Time	↔	8 AM UTC Time
11 PM HST Time	↔	9 AM UTC Time

HST to UTC - Frequently Asked Questions

Q

What is the time difference between HST and UTC?

A

HST is 10 hours behind UTC.

Q

Is HST ahead of or behind UTC?

A

HST is behind UTC by 10 hours.

Q

When it is 9:00 AM in HST, what time is it in UTC?

A

It is 7:00 PM in UTC.

Convert HST Time to Popular Time Zones

Convert Time in Popular Time Zones to UTC