diff --git a/common.py b/common.py
index 348a90f..0ce2857 100644
--- a/common.py
+++ b/common.py
@@ -19,7 +19,7 @@ SARGRAPH_VERSION = "2.2.1"
 # Define units for use with unit_str
 TIME_UNITS = ['seconds', 'minutes', 'hours']
 DATA_UNITS = ['B', 'kB', 'MB', 'GB', 'TB', 'PB']
-
+SPEED_UNITS = ['Mb/s', 'Gb/s', 'Tb/s', 'Pb/s']
 
 # Print an error message and exit with non-zero status
 def fail(msg):
diff --git a/graph.py b/graph.py
index ca35a3f..972e46e 100644
--- a/graph.py
+++ b/graph.py
@@ -207,8 +207,8 @@ def read_comments(session):
     TOTAL_FS = unit_str(TOTAL_FS, DATA_UNITS)
     MAX_USED_FS = unit_str(MAX_USED_FS, DATA_UNITS)
 
-    MAX_RX = unit_str(MAX_RX, DATA_UNITS)
-    MAX_TX = unit_str(MAX_TX, DATA_UNITS)
+    MAX_RX = unit_str(MAX_RX, SPEED_UNITS)
+    MAX_TX = unit_str(MAX_TX, SPEED_UNITS)
 
     DURATION = unit_str(DURATION, TIME_UNITS, 60)
 
@@ -346,9 +346,9 @@ def graph(session, fname='plot'):
 
 
     # Set scale for plots displayed in absolute units
-    plot(f"{NAME_IFACE} received (B/s)", f"{NAME_IFACE} data received (max = {MAX_RX}/s)",
+    plot(f"{NAME_IFACE} received (Mb/s)", f"{NAME_IFACE} data received (max = {MAX_RX})",
          session, 5, space=space, autoscale=1.2)
-    plot(f"{NAME_IFACE} sent (B/s)", f"{NAME_IFACE} data sent (max = {MAX_TX}/s)",
+    plot(f"{NAME_IFACE} sent (Mb/s)", f"{NAME_IFACE} data sent (max = {MAX_TX})",
          session, 6, space=space, autoscale=1.2)
 
     g("unset multiplot")
diff --git a/watch.py b/watch.py
index 25a00b7..b74675e 100644
--- a/watch.py
+++ b/watch.py
@@ -114,8 +114,8 @@ def summarize(session):
     total_ram = TOTAL_RAM * 1024.0
     max_used_fs = MAX_USED_FS * 1024.0 * 1024.0
     total_fs = TOTAL_FS * 1024 * 1024
-    max_tx = MAX_TX * 1024
-    max_rx = MAX_RX * 1024
+    max_tx = MAX_TX / 128 # kB/s to Mb/s
+    max_rx = MAX_RX / 128 # kB/s to Mb/s
 
     sdt = datetime.datetime.strptime(START_DATE, '%Y-%m-%d %H:%M:%S')
     edt = datetime.datetime.strptime(END_DATE, '%Y-%m-%d %H:%M:%S')
@@ -128,8 +128,8 @@ def summarize(session):
               f"max disk used: {max_used_fs:.2f} B",
               f"average load: {average_load:.2f} %",
               f"observed disk: {FS_NAME}",
-              f"max data received: {max_rx:.2f} B",
-              f"max data sent: {max_tx:.2f} B",
+              f"max data received: {max_rx:.2f} Mb/s",
+              f"max data sent: {max_tx:.2f} Mb/s",
               f"observed network: {IFACE_NAME}",
               f"duration: {delta_t} seconds",
               sep=", ", file=f)
@@ -277,8 +277,8 @@ def watch(session, fsdev, iface):
                   cpu_data['%user'][0],
                   ram_data['%memused'][0],
                   fs_data['%fsused'][FS_SAR_INDEX],
-                  stof(net_data['rxkB/s'][IFACE_SAR_INDEX])*1024,
-                  stof(net_data['txkB/s'][IFACE_SAR_INDEX])*1024,
+                  stof(net_data['rxkB/s'][IFACE_SAR_INDEX])/128, # kB/s to Mb/s
+                  stof(net_data['txkB/s'][IFACE_SAR_INDEX])/128, # kB/s to Mb/s
                   file=f)
 
         if die: