diff --git a/include/libzutil.h b/include/libzutil.h
index e2108ceeaa44..4dd2e47da03d 100644
--- a/include/libzutil.h
+++ b/include/libzutil.h
@@ -144,13 +144,15 @@ _LIBZUTIL_H boolean_t zfs_isnumber(const char *);
  * ZFS_NICENUM_TIME:	Print nanosecs, microsecs, millisecs, seconds...
  * ZFS_NICENUM_RAW:	Print the raw number without any formatting
  * ZFS_NICENUM_RAWTIME:	Same as RAW, but print dashes ('-') for zero.
+ * ZFS_NICENUM_BYTES_1000: Same as ZFS_NICENUM_BYTES but use powers of 1000.
  */
 enum zfs_nicenum_format {
 	ZFS_NICENUM_1024 = 0,
 	ZFS_NICENUM_BYTES = 1,
 	ZFS_NICENUM_TIME = 2,
 	ZFS_NICENUM_RAW = 3,
-	ZFS_NICENUM_RAWTIME = 4
+	ZFS_NICENUM_RAWTIME = 4,
+	ZFS_NICENUM_BYTES_1000 = 5
 };
 
 /*
diff --git a/lib/libzutil/zutil_nicenum.c b/lib/libzutil/zutil_nicenum.c
index e05bcb40a8ce..d186a0d31984 100644
--- a/lib/libzutil/zutil_nicenum.c
+++ b/lib/libzutil/zutil_nicenum.c
@@ -67,16 +67,19 @@ zfs_nicenum_format(uint64_t num, char *buf, size_t buflen,
 	const char *units[3][7] = {
 	    [ZFS_NICENUM_1024] = {"", "K", "M", "G", "T", "P", "E"},
 	    [ZFS_NICENUM_BYTES] = {"B", "K", "M", "G", "T", "P", "E"},
-	    [ZFS_NICENUM_TIME] = {"ns", "us", "ms", "s", "?", "?", "?"}
+	    [ZFS_NICENUM_TIME] = {"ns", "us", "ms", "s", "?", "?", "?"},
+	    [ZFS_NICENUM_BYTES_1000] = {"B", "K", "M", "G", "T", "P", "E"}
 	};
 
 	const int units_len[] = {[ZFS_NICENUM_1024] = 6,
 	    [ZFS_NICENUM_BYTES] = 6,
-	    [ZFS_NICENUM_TIME] = 4};
+	    [ZFS_NICENUM_TIME] = 4,
+	    [ZFS_NICENUM_BYTES_1000] = 6};
 
 	const int k_unit[] = {	[ZFS_NICENUM_1024] = 1024,
 	    [ZFS_NICENUM_BYTES] = 1024,
-	    [ZFS_NICENUM_TIME] = 1000};
+	    [ZFS_NICENUM_TIME] = 1000,
+	    [ZFS_NICENUM_BYTES_1000] = 1000};
 
 	double val;
 
@@ -180,5 +183,9 @@ zfs_niceraw(uint64_t num, char *buf, size_t buflen)
 void
 zfs_nicebytes(uint64_t num, char *buf, size_t buflen)
 {
-	zfs_nicenum_format(num, buf, buflen, ZFS_NICENUM_BYTES);
+	if (libzfs_envvar_is_set("ZFS_KB_IS_1000")) {
+		zfs_nicenum_format(num, buf, buflen, ZFS_NICENUM_BYTES_1000);
+	} else {
+		zfs_nicenum_format(num, buf, buflen, ZFS_NICENUM_BYTES);
+	}
 }