At One Place

Days to hours

1 day in hours
1 d = 24 h
h = d × 24

To convert days to hours, multiply by 24. The table below gives the values people look up most often, and the converter works for any number.

Days to hours table

Common day values converted to hours.
Days Hours
1 d 24
2 d 48
3 d 72
4 d 96
5 d 120
10 d 240
15 d 360
20 d 480
25 d 600
30 d 720
40 d 960
50 d 1,200
75 d 1,800
100 d 2,400
250 d 6,000
500 d 12,000
1,000 d 24,000

How the conversion works

The relationship is h = d × 24. Both units measure time, so the conversion is a fixed factor that never changes.

Common questions

How many hours are in one day?
One day equals 24 hours. h = d × 24.
How do you convert days to hours?
Use h = d × 24. So 10 d is 240 h.
How many days are in one hour?
One hour equals 0.041667 days, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked