How do you convert PST to EST?

Use EST = PST + 3 hours. For 21:00 PST that gives 00:00 EST.

What does 21:00 PST actually mean?

It sits between 17 and 23 PST; the table on this page shows how those compare.

21:00 PST to EST

00:00 EST

21:00 Pacific Standard Time equals 00:00 Eastern Standard Time.

These are standard-time offsets, which never change. What changes is which one a place observes: New York is on EST in winter but EDT (an hour later) during daylight saving, and the UK is on GMT in winter and BST in summer. If you mean "the time in New York right now", use the full converter — it reads live offsets.

How the conversion works

This one is a formula rather than a single multiplier:

EST = PST + 3 hours → 00:00 EST

Going the other way: 00:00 EST to PST.

Convert a different time zone

PST =00:00 EST

Open the full time zone converter for every other unit.

Nearby values

PST	EST
17:00 PST	20:00 EST
18:00 PST	21:00 EST
19:00 PST	22:00 EST
20:00 PST	23:00 EST
22:00 PST	01:00 EST
23:00 PST	02:00 EST

Questions

What is 21:00 PST in EST?: 21:00 PST is 00:00 EST.
How do you convert PST to EST?: Use EST = PST + 3 hours. For 21:00 PST that gives 00:00 EST.
What does 21:00 PST actually mean?: It sits between 17 and 23 PST; the table on this page shows how those compare.