diff --git a/unmaintained/see_dat/see_dat.go b/unmaintained/see_dat/see_dat.go
index f86936364..14163b706 100644
--- a/unmaintained/see_dat/see_dat.go
+++ b/unmaintained/see_dat/see_dat.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"flag"
-	master_ui "github.com/chrislusf/seaweedfs/weed/server/volume_server_ui"
+	"github.com/chrislusf/seaweedfs/weed/util"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
@@ -31,11 +31,8 @@ func (scanner *VolumeFileScanner4SeeDat) ReadNeedleBody() bool { return true }
 func (scanner *VolumeFileScanner4SeeDat) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) error {
 	t := time.Unix(int64(n.AppendAtNs)/int64(time.Second), int64(n.AppendAtNs)%int64(time.Second))
 
-	if readable, ok := master_ui.BytesToHumanReadable(uint64(n.Size)); ok {
-		glog.V(0).Infof("%d,%s%x offset %d size %d (%s) cookie %x appendedAt %v", *volumeId, n.Id, n.Cookie, offset, n.Size, readable, n.Cookie, t)
-	} else {
-		glog.V(0).Infof("%d,%s%x offset %d size %d cookie %x appendedAt %v", *volumeId, n.Id, n.Cookie, offset, n.Size, n.Cookie, t)
-	}
+	glog.V(0).Infof("%d,%s%x offset %d size %s cookie %x appendedAt %v",
+		*volumeId, n.Id, n.Cookie, offset, util.BytesToHumanReadable(uint64(n.Size)), n.Cookie, t)
 
 	return nil
 }
diff --git a/unmaintained/see_idx/see_idx.go b/unmaintained/see_idx/see_idx.go
index 095e2c5e3..5680b3d7e 100644
--- a/unmaintained/see_idx/see_idx.go
+++ b/unmaintained/see_idx/see_idx.go
@@ -3,7 +3,7 @@ package main
 import (
 	"flag"
 	"fmt"
-	master_ui "github.com/chrislusf/seaweedfs/weed/server/volume_server_ui"
+	"github.com/chrislusf/seaweedfs/weed/util"
 	"os"
 	"path"
 	"strconv"
@@ -37,11 +37,8 @@ func main() {
 	defer indexFile.Close()
 
 	idx.WalkIndexFile(indexFile, func(key types.NeedleId, offset types.Offset, size uint32) error {
-		if readable, ok := master_ui.BytesToHumanReadable(uint64(size)); ok {
-			fmt.Printf("key:%v offset:%v size:%v (%s)\n", key, offset, size, readable)
-		} else {
-			fmt.Printf("key:%v offset:%v size:%v\n", key, offset, size)
-		}
+		fmt.Printf("key:%v offset:%v size:%v\n", key, offset, util.BytesToHumanReadable(uint64(size)))
+
 		return nil
 	})
 }
diff --git a/weed/server/volume_server_ui/templates.go b/weed/server/volume_server_ui/templates.go
index d703518cc..a3175e9ca 100644
--- a/weed/server/volume_server_ui/templates.go
+++ b/weed/server/volume_server_ui/templates.go
@@ -7,16 +7,8 @@ import (
 	"strings"
 )
 
-const unit = 1024
-
-// BytesToHumanReadable exposes the bytesToHumanReadble.
-// It returns the converted human readable representation of the bytes
-// and the conversion state that true for conversion realy occurred or false for no conversion.
-func BytesToHumanReadable(b uint64) (string, bool) {
-	return bytesToHumanReadble(b), b >= unit
-}
-
 func bytesToHumanReadble(b uint64) string {
+	const unit = 1024
 	if b < unit {
 		return fmt.Sprintf("%d B", b)
 	}
diff --git a/weed/util/size.go b/weed/util/size.go
new file mode 100644
index 000000000..7662a53bc
--- /dev/null
+++ b/weed/util/size.go
@@ -0,0 +1,21 @@
+package util
+
+import "fmt"
+
+// BytesToHumanReadable exposes the bytesToHumanReadble.
+// It returns the converted human readable representation of the bytes
+func BytesToHumanReadable(b uint64) string {
+	const unit = 1024
+
+	if b < unit {
+		return fmt.Sprintf("%d", b)
+	}
+
+	div, exp := uint64(unit), 0
+	for n := b / unit; n >= unit; n /= unit {
+		div *= unit
+		exp++
+	}
+
+	return fmt.Sprintf("%d(%.2f %ciB)", b, float64(b)/float64(div), "KMGTPE"[exp])
+}