Time
The time chain where the decimal point isn't in charge – week, day, hour, minute, second and millisecond, a different multiplier at every step. Edit, print and share.
The time table in chain form: 1 week = 7 days, 1 day = 24 hours, 1 hour = 60 minutes, 1 minute = 60 seconds, 1 second = 1 000 milliseconds. Made for the classroom and home.
| 1 wk | = | 7 d |
|---|---|---|
| 1 d | = | 24 h |
| 1 h | = | 60 min |
| 1 min | = | 60 s |
| 1 s | = | 1 000 ms |
| 1 h | = | 3 600 s |
| 1 d | = | 1 440 min |
| 1 d | = | 86 400 s |
How the table works
Every row is a unit conversion: a quantity and unit on the left, the same quantity expressed in another unit on the right. The table is live – drag the handle to reorder, click a row to change the quantity or units, remove rows with the cross and add your own at the bottom.
Everything you change lands in the page address. Copy the link and others open exactly your table – handy when the whole class needs the same sheet. Your changes are also kept in your browser until you reset them, but only there: to share or keep them permanently, the link is what counts.
Print puts the table on a single portrait A4 and Download PDF gives you the same sheet as a file. Print practice sheet gives the table with empty answer cells and name/date lines – the normal printout is the answer key.
The staircase that doesn’t work
Unlike the prefix ladder, the time chain is irregular: week to day is ×7, day to hour is ×24, hour to minute is ×60 and minute to second is ×60 again – never ×10. Only the last step, second to millisecond, is an ordinary ×1 000 step – the same jump as between metre and millimetre in the length table.
Good to know: because the steps differ in size, every conversion has to be worked out on its own – you cannot move the decimal point through the whole chain the way you can in the length or mass table.
Roughly how long?
- A school day is roughly 6 hours.
- A football match is 90 minutes.
- A day is 1 440 minutes.
- A blink takes roughly 300 milliseconds.
Frequently asked questions
How many seconds are there in an hour?
3 600 seconds (60 × 60).
How many minutes are there in a day?
1 440 minutes (24 × 60).
Why aren’t months and years in the table?
They differ in length – a “month” is 28–31 days depending which one – so the table only shows the exact relationships.
More tables: Speed · Power · Prefix ladder · Time converter