diff --git a/bench.sh b/bench.sh
index ba9d524..acb06cd 100644
--- a/bench.sh
+++ b/bench.sh
@@ -81,6 +81,7 @@ calc_disk() {
     for size in ${array[@]}
     do
         [ "${size}" == "0" ] && size_t=0 || size_t=`echo ${size:0:${#size}-1}`
+        [ "`echo ${size:(-1)}`" == "K" ] && size=0
         [ "`echo ${size:(-1)}`" == "M" ] && size=$( awk 'BEGIN{printf "%.1f", '$size_t' / 1024}' )
         [ "`echo ${size:(-1)}`" == "T" ] && size=$( awk 'BEGIN{printf "%.1f", '$size_t' * 1024}' )
         [ "`echo ${size:(-1)}`" == "G" ] && size=${size_t}