Local time · UTC · BCD digits
01:32:23
HHMMSS
Hours
0
0
0
0
0
0
0
0
1
1
0000 0001
Minutes
0
0
1
1
3
0
0
1
0
2
0011 0010
Seconds
0
0
1
0
2
0
0
1
1
3
0010 0011
BCD shows each decimal digit as 4 binary bits.
Thursday, October 15, 2026
Copy preview
01:32:23 -> 0000 0001 0011 0010 0010 0011
Binary clock settings
Shortcuts: F fullscreen, C copy, S seconds, B mode, 1 12-hour, 2 24-hour
Binary Clock (Time in Binary)
View local time in binary using BCD or pure binary, with seconds, 12/24-hour mode, copy, and fullscreen.
Read the binary display
BCD digits encodes each decimal digit separately. In a time of 12:34:56, the six columns represent 1, 2, 3, 4, 5, and 6. Add the lit bit weights in each column to recover its digit.
Pure binary encodes the complete hour, minute, and second values instead of six decimal digits. For 10 seconds, the second value is binary 1010, which uses weights 8 and 2. Seconds and 24-hour settings change which values are included before encoding.
Clock behavior
Copy exports the encoded and standard readings. The clock uses current device time and redraws in the browser. It is an alternate representation, not a separate time source.