Clock: Hours and Half-Hours
Time · Class III
Move the hands and read the time.
3
type a value
112
30 min
type a value
055
Live values
- Hour-hand angle (deg)105
- Minute-hand angle (deg)180
- Minutes after noon210
Live readout
Hour-hand angle (deg)105
Minute-hand angle (deg)180
Minutes after noon210
Hour3
Minutes30 min
Formulas in this lab
- Hour-hand angle (deg)
- Minute-hand angle (deg)
- Minutes after noon
Tip: The minute hand moves 6 degrees every minute!
Frequently asked questions
▶How do I read a clock?
The short hand shows hours and the long hand shows minutes. When the long hand points to 12, it is an exact hour like 3 o'clock. When the long hand is on 6, it is half past the hour.
▶How do I use the clock lab?
Move the hour and minute hand sliders to set any time. The clock face updates and writes the time in words below. Try moving only the long hand to see hours and half-hours.
▶When do we use clock time?
School starts at 8 o'clock, lunch is at half past 12, and TV cartoons may be at 5 o'clock. Reading the clock helps you stay on time for class, meals and play.
▶Tip for telling time
Look at the short hand first to find the hour. Then look at the long hand: pointing to 12 means o'clock, pointing to 6 means half past. With practice, you will read clocks at a glance.