Grade 4 Math

Time units

Practise hour-minute conversions, day-hour conversions, and mixed time answers such as 1 h 30 min.

How to solve this

  • Keep the basic facts visible: 1 h = 60 min, 1 day = 24 h, and 1 week = 7 days.
  • To convert 90 minutes, take one full hour of 60 minutes and keep the remaining 30 minutes.
  • When calculating durations, convert to one unit first if the start and end units differ.

Examples

1 h = __ min

60

2 days = __ h

48

90 min

1 h 30 min

Practice problems with answers

Solve these problems on paper or out loud, then check the answer key. The online practice and the printable worksheet give a new set every time.

  1. 7 h = ___ min
  2. 60 min + 75 min = ___ min
  3. 60 min = ___
  4. 15 min + 90 min = ___ min
  5. 90 min = ___
  6. 15 min + 45 min = ___ min
  7. 5 h = ___ min
  8. 30 min + 75 min = ___ min
Show answers
  1. 420 min
  2. 135 min
  3. 1 h 0 min
  4. 105 min
  5. 1 h 30 min
  6. 60 min
  7. 300 min
  8. 105 min

More topics in this section