The query "how many hours until" is incomplete and generally requires a specific target time or event to calculate the hours remaining until that point. The common method to find how many hours until a certain time or date involves subtracting the current time from the target time. This can be done by converting both times to a 24-hour clock format and subtracting to find the difference in hours and minutes. For example:

• To find the hours until 4:00 PM if the current time is 11:30 AM, convert 4:00 PM to 16:00 and subtract 11:30 from 16:00, resulting in 4 hours and 30 minutes remaining.
• For dates, subtract the current date from the target date to find the days remaining, then convert remaining time parts into hours as needed.

To get a precise answer, please specify the time or event until which the hours are to be calculated.