diff --git a/client/src/App.js b/client/src/App.js
index 72abdb9..914eca6 100644
--- a/client/src/App.js
+++ b/client/src/App.js
@@ -525,7 +525,7 @@ function Air({name, sensorName, end, duration}) {
 
 			<CartesianGrid strokeDasharray='3 3'/>
 			<Tooltip
-				formatter={(v, name) => v + units[name]}
+				formatter={(v, name) => v.toFixed(1) + units[name]}
 				labelFormatter={timeStr => moment(timeStr).tz('America/Edmonton').format('ddd MMM DD h:mm A')}
 				separator=': '
 			/>