diff --git a/nomadnet/ui/textui/Interfaces.py b/nomadnet/ui/textui/Interfaces.py
index 4134a5f..e0f24a9 100644
--- a/nomadnet/ui/textui/Interfaces.py
+++ b/nomadnet/ui/textui/Interfaces.py
@@ -1303,8 +1303,8 @@ class InterfaceBandwidthChart:
 
         self.rx_rates.pop(0)
         self.tx_rates.pop(0)
-        self.rx_rates.append(rx_delta)
-        self.tx_rates.append(tx_delta)
+        self.rx_rates.append(rx_delta*8)
+        self.tx_rates.append(tx_delta*8)
 
         if self.update_count >= self.stabilization_updates:
             self.initialization_complete = True
@@ -1328,14 +1328,14 @@ class InterfaceBandwidthChart:
         peak_rx = self.peak_rx_for_display if self.initialization_complete else 0
         peak_tx = self.peak_tx_for_display if self.initialization_complete else 0
 
-        peak_rx_str = format_bytes(peak_rx)
-        peak_tx_str = format_bytes(peak_tx)
+        peak_rx_str = RNS.prettyspeed(peak_rx*8)
+        peak_tx_str = RNS.prettyspeed(peak_tx*8)
 
         rx_chart = chart.plot(
             [rx_data],
             {
                 'height': height,
-                'format': '{:8.1f}',
+                'format': RNS.prettyspeed,
                 'min': 0,
                 'max': self.max_rx_rate * 1.1,
             }
@@ -1345,7 +1345,7 @@ class InterfaceBandwidthChart:
             [tx_data],
             {
                 'height': height,
-                'format': '{:8.1f}',
+                'format': RNS.prettyspeed,
                 'min': 0,
                 'max': self.max_tx_rate * 1.1,
             }
diff --git a/nomadnet/vendor/AsciiChart.py b/nomadnet/vendor/AsciiChart.py
index 4689590..cd24d56 100644
--- a/nomadnet/vendor/AsciiChart.py
+++ b/nomadnet/vendor/AsciiChart.py
@@ -46,7 +46,11 @@ class AsciiChart:
         result = [[' '] * width for i in range(rows + 1)]
 
         for y in range(min2, max2 + 1):
-            label = placeholder.format(maximum - ((y - min2) * interval / (rows if rows else 1)))
+            if callable(placeholder):
+                label = placeholder(maximum - ((y - min2) * interval / (rows if rows else 1))).rjust(12)
+            else:
+                label = placeholder.format(maximum - ((y - min2) * interval / (rows if rows else 1)))
+
             result[y - min2][max(offset - len(label), 0)] = label
             result[y - min2][offset - 1] = symbols[0] if y == 0 else symbols[1]