diff --git a/sbin/hammer/cmd_stats.c b/sbin/hammer/cmd_stats.c
index 5a853f7..bb814e1 100644
--- a/sbin/hammer/cmd_stats.c
+++ b/sbin/hammer/cmd_stats.c
@@ -37,8 +37,13 @@
 #include "hammer.h"
 #include <math.h>
 #include <sys/sysctl.h>
+#include <sys/types.h>
+#include <stdbool.h>
+#include <libutil.h>
+#include <sysexits.h>
 
 static void loaddelay(struct timespec *ts, const char *arg);
+static void usage(void);
 
 void
 hammer_cmd_bstats(char **av, int ac)
@@ -109,6 +114,9 @@ hammer_cmd_bstats(char **av, int ac)
 void
 hammer_cmd_iostats(char **av, int ac)
 {
+	int ch;
+	char st[8][5];
+	_Bool humanize;
 	int mibs[9][16];
 	size_t lens[9];
 	int64_t stats[9];
@@ -154,6 +162,21 @@ hammer_cmd_iostats(char **av, int ac)
 		perror("sysctl: HAMMER stats not available");
 		exit(1);
 	}
+	
+	humanize = false;
+
+	while ((ch = getopt(ac, av, "hm")) != -1) {
+		switch (ch) {
+			case 'm':
+				humanize = true;
+				break;
+			case 'h':
+				usage();
+			default:
+				usage();
+		}
+	}
+
 
 	for (count = 0; ; ++count) {
 		for (i = 0; i <= 8; ++i) {
@@ -164,19 +187,40 @@ hammer_cmd_iostats(char **av, int ac)
 				exit(1);
 			}
 		}
+		
 		if (count) {
 			if ((count & 15) == 1)
 				printf("  file-rd   file-wr  dev-read dev-write inode_ops ino_flsh cmmit     undo\n");
-			printf("%9jd %9jd %9jd %9jd %9jd %8jd %5jd %8jd\n",
-				(intmax_t)(stats[0] - copy[0]),
-				(intmax_t)(stats[1] - copy[1]),
-				(intmax_t)(stats[2] - copy[2]),
-				(intmax_t)(stats[3] - copy[3]),
-				(intmax_t)(stats[4] + stats[5] -
-					   copy[4] - copy[5]),
-				(intmax_t)(stats[6] - copy[6]),
-				(intmax_t)(stats[7] - copy[7]),
-				(intmax_t)(stats[8] - copy[8]));
+		if (humanize) {
+			humanize_number(st[0], sizeof(st[0]), (intmax_t)(stats[0] - copy[0]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);	
+			humanize_number(st[1], sizeof(st[1]), (intmax_t)(stats[1] - copy[1]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);
+			humanize_number(st[2], sizeof(st[2]), (intmax_t)(stats[2] - copy[2]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);
+			humanize_number(st[3], sizeof(st[3]), (intmax_t)(stats[3] - copy[3]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);
+			humanize_number(st[4], sizeof(st[4]), (intmax_t)(stats[4] + stats[5] - copy[4] - copy[5]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);
+			humanize_number(st[5], sizeof(st[5]), (intmax_t)(stats[6] - copy[6]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);
+			humanize_number(st[6], sizeof(st[6]), (intmax_t)(stats[7] - copy[7]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);
+			humanize_number(st[7], sizeof(st[7]), (intmax_t)(stats[8] - copy[8]), "", HN_AUTOSCALE, HN_DECIMAL|HN_NOSPACE|HN_B);
+			printf("%s %s %s %s %s %s %s %s\n",
+				   st[0],
+				   st[1],
+				   st[2],
+				   st[3],
+				   st[4],
+				   st[5],
+				   st[6],
+				   st[7]);
+		} else {
+				printf("%9jd %9jd %9jd %9jd %9jd %8jd %5jd %8jd\n",
+					(intmax_t)(stats[0] - copy[0]),
+					(intmax_t)(stats[1] - copy[1]),
+					(intmax_t)(stats[2] - copy[2]),
+					(intmax_t)(stats[3] - copy[3]),
+					(intmax_t)(stats[4] + stats[5] -
+						   copy[4] - copy[5]),
+					(intmax_t)(stats[6] - copy[6]),
+					(intmax_t)(stats[7] - copy[7]),
+					(intmax_t)(stats[8] - copy[8]));
+			}
 		}
 		nanosleep(&delay, NULL);
 		bcopy(stats, copy, sizeof(stats));
@@ -199,3 +243,13 @@ loaddelay(struct timespec *ts, const char *arg)
 	ts->tv_nsec = (int)(modf(d, &d) * 1000000000.0);
 }
 
+static
+void
+usage(void)
+{
+	fprintf(stderr, "hammer iostats [interval] [options]\n");
+	fprintf(stderr, "\nOptions:\n"
+			"\t-m\t Display humanized output.\n"
+			"\t-h\t Displays this list of options.\n");
+	exit(EX_USAGE);
+}
\ No newline at end of file
diff --git a/sbin/hammer/hammer.8 b/sbin/hammer/hammer.8
index 97b121f..0db8b22 100644
--- a/sbin/hammer/hammer.8
+++ b/sbin/hammer/hammer.8
@@ -257,6 +257,8 @@ Pause
 .Ar interval
 seconds between each display.
 The default interval is one second.
+.It Fl m
+Displays humanized numbers.
 .\" ==== history ====
 .It Cm history Ar path ...
 Show the modification history for
diff --git a/sbin/hammer/hammer.c b/sbin/hammer/hammer.c
index 88b51c4..4af9873 100644
--- a/sbin/hammer/hammer.c
+++ b/sbin/hammer/hammer.c
@@ -548,7 +548,7 @@ usage(int exit_code)
 		"	command [argument ...]\n"
 		"hammer synctid <filesystem> [quick]\n"
 		"hammer bstats [interval]\n"
-		"hammer iostats [interval]\n"
+		"hammer iostats [interval] [options]\n"
 		"hammer history[@offset[,len]] <file> ...\n"
 		"hammer namekey1 <path>\n"
 		"hammer namekey2 <path>\n"