If you want to know how long until 4 30 pm, then you can use our online clock. This will show you the exact time remaining before your event, meeting or deadline. The tool will automatically calculate the remaining time in hours and minutes. Just type in the date and time you want to find out about and the calculator will give you the answer. The hour calculator works in both standard and military time, so you can convert any time from any country in the world. Just remember that Europeans say the hours until 12, while Americans only go between 00:00 and 23:59, adding am or pm after the result. You can also use the calculator to see how many hours until 9 pm.