What time is it in Los Angeles when it's noon in London?

When it's 12:00 PM in London, it's 4:00 AM in Los Angeles.

How many hours apart are London and Los Angeles?

London and Los Angeles are separated by the current UTC-offset difference between their time zones, adjusted for daylight saving time on each side.

London uses Europe/London (the IANA time zone database identifier).

City time converter

Convert the current time in London, UK to Los Angeles, USA. Daylight-saving adjustments applied automatically.

Common times in London and their equivalents in Los Angeles:

Table computed using a fixed reference date for stability. Use the full converter for any date and time.

Country: UK
Zone: Europe/London

Country: USA
Zone: America/Los_Angeles

What time is it in Los Angeles when it's noon in London?: When it's 12:00 PM in London, it's 4:00 AM in Los Angeles.
How many hours apart are London and Los Angeles?: London and Los Angeles are separated by the current UTC-offset difference between their time zones, adjusted for daylight saving time on each side.
What time zone does London use?: London uses Europe/London (the IANA time zone database identifier).