diff --git a/WHATS_NEW b/WHATS_NEW
index 44b1df872..8f0d13152 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.169 - 
 =====================================
+  Use new default units 'r' for displaying sizes.
   Also unmount mount point on top of MD device if using blkdeactivate -u.
   Restore check preventing resize of cache type volumes (2.02.158).
   Add missing udev sync when flushing dirty cache content.
diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 67aed5e53..a8d41052c 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.138 - 
 =====================================
+  Support new R|r human readable units output format.
   Thin dmeventd plugin reacts faster on lvextend failure path with umount.
   Add dm_stats_bind_from_fd() to bind a stats handle from a file descriptor.
   Do not try call callback when reverting activation on error path.
diff --git a/conf/example.conf.in b/conf/example.conf.in
index b1a2a9c54..c3defe5e0 100644
--- a/conf/example.conf.in
+++ b/conf/example.conf.in
@@ -665,7 +665,7 @@ global {
 
 	# Configuration option global/units.
 	# Default value for --units argument.
-	units = "h"
+	units = "r"
 
 	# Configuration option global/si_unit_consistency.
 	# Distinguish between powers of 1024 and 1000 bytes.
diff --git a/lib/config/defaults.h b/lib/config/defaults.h
index d98877955..5479cc526 100644
--- a/lib/config/defaults.h
+++ b/lib/config/defaults.h
@@ -176,7 +176,7 @@
 #define DEFAULT_INDENT 1
 #define DEFAULT_ABORT_ON_INTERNAL_ERRORS 0
 #define DEFAULT_DETECT_INTERNAL_VG_CACHE_CORRUPTION 0
-#define DEFAULT_UNITS "h"
+#define DEFAULT_UNITS "r"
 #define DEFAULT_SUFFIX 1
 #define DEFAULT_HOSTTAGS 0
 
diff --git a/libdm/libdm-string.c b/libdm/libdm-string.c
index 39117f8d1..d24a4741a 100644
--- a/libdm/libdm-string.c
+++ b/libdm/libdm-string.c
@@ -468,10 +468,12 @@ const char *dm_size_to_string(struct dm_pool *mem, uint64_t size,
 	unsigned base = BASE_UNKNOWN;
 	unsigned s;
 	int precision;
+	double d;
 	uint64_t byte = UINT64_C(0);
 	uint64_t units = UINT64_C(1024);
 	char *size_buf = NULL;
 	char new_unit_type = '\0', unit_type_buf[2];
+	const char *prefix = "";
 	const char * const size_str[][3] = {
 		/* BASE_UNKNOWN */
 		{"         ", "   ", " "},	/* [0] */
@@ -570,7 +572,7 @@ const char *dm_size_to_string(struct dm_pool *mem, uint64_t size,
 		byte = unit_factor;
 	} else {
 		/* Human-readable style */
-		if (unit_type == 'H') {
+		if (unit_type == 'H' || unit_type == 'R') {
 			units = UINT64_C(1000);
 			base = BASE_1000;
 		} else {
@@ -586,6 +588,16 @@ const char *dm_size_to_string(struct dm_pool *mem, uint64_t size,
 		for (s = 0; s < NUM_UNIT_PREFIXES && size < byte; s++)
 			byte /= units;
 
+		if ((s < NUM_UNIT_PREFIXES) &&
+		    ((unit_type == 'R') || (unit_type == 'r'))) {
+			/* When the rounding would cause difference, add '<' prefix
+			 * i.e.  2043M is more then 1.9949G prints <2.00G
+			 * This version is for 2 digits fixed precision */
+			d = 100. * (double) size / byte;
+			if (!_close_enough(floorl(d), nearbyintl(d)))
+				prefix = "<";
+		}
+
 		include_suffix = 1;
 	}
 
@@ -599,7 +611,7 @@ const char *dm_size_to_string(struct dm_pool *mem, uint64_t size,
 		precision = 2;
 	}
 
-	snprintf(size_buf, SIZE_BUF - 1, "%.*f%s", precision,
+	snprintf(size_buf, SIZE_BUF - 1, "%s%.*f%s", prefix, precision,
 		 (double) size / byte, include_suffix ? size_str[base + s][suffix_type] : "");
 
 	return size_buf;
@@ -639,6 +651,8 @@ uint64_t dm_units_to_factor(const char *units, char *unit_type,
 	switch (*units) {
 	case 'h':
 	case 'H':
+	case 'r':
+	case 'R':
 		multiplier = v = UINT64_C(1);
 		*unit_type = *units;
 		break;