diff --git a/man5/proc.5 b/man5/proc.5
index 8752f3a03..3094d26f0 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -667,28 +667,34 @@ The number of major faults that the process's
 waited-for children have made.
 .TP
 \fIutime\fP %lu
-The number of jiffies that this process has been scheduled in user
-mode.
+Amount of time that this process has been scheduled in user mode,
+measured in clock ticks (divide by
+.IR sysconf(_SC_CLK_TCK) .
 This includes guest time, \fIguest_time\fP
 (time spent running a virtual CPU, see below),
 so that applications that are not aware of the guest time field
 do not lose that time from their calculations.
 .TP
 \fIstime\fP %lu
-The number of jiffies that this process has been scheduled in kernel
-mode.
+Amount of time that this process has been scheduled in kernel mode,
+measured in clock ticks (divide by
+.IR sysconf(_SC_CLK_TCK) .
 .TP
 \fIcutime\fP %ld
-The number of jiffies that this process's
-waited-for children have been scheduled in user mode.
+Amount of time that this process's
+waited-for children have been scheduled in user mode,
+measured in clock ticks (divide by
+.IR sysconf(_SC_CLK_TCK) .
 (See also
 .BR times (2).)
 This includes guest time, \fIcguest_time\fP
 (time spent running a virtual CPU, see below).
 .TP
 \fIcstime\fP %ld
-The number of jiffies that this process's
-waited-for children have been scheduled in kernel mode.
+Amount of time that this process's
+waited-for children have been scheduled in kernel mode,
+measured in clock ticks (divide by
+.IR sysconf(_SC_CLK_TCK) .
 .TP
 \fIpriority\fP %ld
 (Explanation for Linux 2.6)
@@ -842,10 +848,12 @@ Aggregated block I/O delays, measured in clock ticks (centiseconds).
 .TP
 \fIguest_time\fP %lu (since Linux 2.6.24)
 Guest time of the process (time spent running a virtual CPU
-for a guest operating system), in centiseconds.
+for a guest operating system), measured in clock ticks (divide by
+.IR sysconf(_SC_CLK_TCK) .
 .TP
 \fIcguest_time\fP %ld (since Linux 2.6.24)
-Guest time of the process's children, in centiseconds.
+Guest time of the process's children, measured in clock ticks (divide by
+.IR sysconf(_SC_CLK_TCK) .
 .RE
 .TP
 .I /proc/[number]/statm