00:00:00
—
Decimal Hour
0
Decimal Minute
00
Decimal Second
00
What is decimal time?
Decimal time splits the day into 10 hours, each hour into 100 minutes, and each minute into 100 seconds. That's 100,000 decimal seconds per day.
To convert standard time to decimal, take your current time as a fraction of the 24‑hour day, then map it to the decimal scale.
The math
fraction = (h·3600 + m·60 + s + ms/1000) / 86400
decHours = fraction × 10
H = floor(decHours)
M = floor((decHours − H) × 100)
S = ((decHours − H) × 100 − M) × 100
FAQ
- Why 10 hours? It mirrors base‑10 counting and makes percentages of a day intuitive.
- Is this French Revolutionary Time? Yes—this modern take follows the 1793 decimal clock idea.
- What about time zones and DST? We show your local civil time converted to decimal.