diff --git a/libmproxy/console/common.py b/libmproxy/console/common.py
index a2cfd57b3..fa21c93e3 100644
--- a/libmproxy/console/common.py
+++ b/libmproxy/console/common.py
@@ -162,7 +162,7 @@ def raw_format_flow(f, focus, extended, padding):
         if f["resp_ctype"]:
             resp.append(fcol(f["resp_ctype"], rc))
         resp.append(fcol(f["resp_clen"], rc))
-        resp.append(fcol(f["resp_rate"], rc))
+        resp.append(fcol(f["roundtrip"], rc))
 
     elif f["err_msg"]:
         resp.append(fcol(SYMBOL_RETURN, "error"))
@@ -345,19 +345,17 @@ def format_flow(f, focus, extended=False, hostheader=False, padding=2):
             contentdesc = "[content missing]"
         else:
             contentdesc = "[no content]"
-
-        if f.response.timestamp_end:
-            delta = f.response.timestamp_end - f.response.timestamp_start
-        else:
-            delta = 0
+        duration = 0
+        if f.response.timestamp_end and f.request.timestamp_start:
+            duration = f.response.timestamp_end - f.request.timestamp_start
         size = f.response.size()
-        rate = utils.pretty_size(size / ( delta if delta > 0 else 1 ) )
+        roundtrip = utils.pretty_duration(duration)
 
         d.update(dict(
             resp_code = f.response.code,
             resp_is_replay = f.response.is_replay,
             resp_clen = contentdesc,
-            resp_rate = "{0}/s".format(rate),
+            roundtrip = roundtrip,
         ))
         t = f.response.headers["content-type"]
         if t:
diff --git a/libmproxy/utils.py b/libmproxy/utils.py
index 33af035f1..76e99c34f 100644
--- a/libmproxy/utils.py
+++ b/libmproxy/utils.py
@@ -79,6 +79,18 @@ def pretty_size(size):
                 x = int(x)
             return str(x) + suf
 
+def pretty_duration(secs):
+    formatters = [
+        (100, "{:.0f}s"), 
+        (10, "{:2.1f}s"), 
+        (1, "{:1.2f}s"),         
+    ]
+
+    for limit, formatter in formatters:
+        if secs >= limit:
+            return formatter.format(secs)
+    #less than 1 sec 
+    return "{:.0f}ms".format(secs*1000)
 
 class Data:
     def __init__(self, name):
diff --git a/test/test_utils.py b/test/test_utils.py
index d99a146df..45bfb4f7f 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -50,6 +50,19 @@ def test_urldecode():
     s = "one=two&three=four"
     assert len(utils.urldecode(s)) == 2
 
+def test_pretty_duration():
+    assert utils.pretty_duration(0.00001) == "0ms"
+    assert utils.pretty_duration(0.0001) == "0ms"
+    assert utils.pretty_duration(0.001) == "1ms"
+    assert utils.pretty_duration(0.01) == "10ms"
+    assert utils.pretty_duration(0.1) == "100ms"
+    assert utils.pretty_duration(1) == "1.00s"
+    assert utils.pretty_duration(10) == "10.0s"
+    assert utils.pretty_duration(100) == "100s"
+    assert utils.pretty_duration(1000) == "1000s"
+    assert utils.pretty_duration(10000) == "10000s"    
+    assert utils.pretty_duration(1.123) == "1.12s"
+    assert utils.pretty_duration(0.123) == "123ms"
 
 def test_LRUCache():
     class Foo: