diff --git a/cara/apps/calculator/templates/calculator.form.html.j2 b/cara/apps/calculator/templates/calculator.form.html.j2
index 682dce11..867ae715 100644
--- a/cara/apps/calculator/templates/calculator.form.html.j2
+++ b/cara/apps/calculator/templates/calculator.form.html.j2
@@ -42,10 +42,10 @@
         <span class="tooltip_text">?</span>
     </div><br>
     <input type="radio" id="room_type_volume" name="volume_type" value="room_volume" onclick="require_fields(this)" required>
-    Room volume: &nbsp;&nbsp; <input type="number" step=0.01 id="room_volume" name="room_volume" placeholder="Room volume (m³)" min="0.01"><br>
+    Room volume: &nbsp;&nbsp; <input type="number" step="any" id="room_volume" name="room_volume" placeholder="Room volume (m³)" min="0"><br>
     <input type="radio" id="room_type_dimensions" name="volume_type" value="room_dimensions" onclick="require_fields(this)" required>
-    Floor area: &nbsp;&nbsp; <input type="number" step=0.01 id="floor_area" name="floor_area" placeholder="Room floor area (m²)" min="0.01"><br>
-    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ceiling height: &nbsp;&nbsp; <input type="number" step=0.01 id="ceiling_height" name="ceiling_height" placeholder="Room ceiling height (m²)" min="0.01"><br>
+    Floor area: &nbsp;&nbsp; <input type="number" step="any" id="floor_area" name="floor_area" placeholder="Room floor area (m²)" min="0"><br>
+    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ceiling height: &nbsp;&nbsp; <input type="number" step="any" id="ceiling_height" name="ceiling_height" placeholder="Room ceiling height (m²)" min="0"><br>
     <hr width="80%">
 
     <!-- Ventilation Options -->
@@ -60,15 +60,15 @@
 
     <div id="DIVmechanical_ventilation" style="display:none">
         <input type="radio" id="air_type_supply" name="mechanical_ventilation_type" value="air_supply" onclick="require_fields(this)">
-        Air supply flow rate &nbsp;&nbsp; <input type="number" step=0.01 id="air_supply" name="air_supply" min="0" placeholder="(m³ / hour)"><br>
+        Air supply flow rate &nbsp;&nbsp; <input type="number" step="any" id="air_supply" name="air_supply" min="0" placeholder="(m³ / hour)"><br>
         <input type="radio" id="air_type_changes" name="mechanical_ventilation_type" value="air_changes" onclick="require_fields(this)">
-        Air changes per hour &nbsp;&nbsp; <input type="number" step=0.01 id="air_changes" name="air_changes" min="0"><br>
+        Air changes per hour &nbsp;&nbsp; <input type="number" step="any" id="air_changes" name="air_changes" min="0"><br>
     </div>
 
     <div id="DIVnatural_ventilation" style="display:none">
         Number of windows: <input type="number" id="windows_number" name="windows_number" min="1"><br>
-        Height of window: <input type="number" step=0.01 id="window_height" name="window_height" placeholder="meters" min="0"><br>
-        Opening distance: <input type="number" step=0.01 id="opening_distance"  name="opening_distance" placeholder="meters" min="0"><br>
+        Height of window: <input type="number" step="any" id="window_height" name="window_height" placeholder="meters" min="0"><br>
+        Opening distance: <input type="number" step="any" id="opening_distance"  name="opening_distance" placeholder="meters" min="0"><br>
         Windows open: <input type="radio" id="always" name="windows_open" value="always">
                       <label for="always">Always</label>
                       <input type="radio" id="interval" name="windows_open" value="interval">
@@ -81,7 +81,7 @@
     <label for="hepa_no">No</label>
     <input type="radio" id="hepa_yes" name="hepa_option" value=1 onclick="require_fields(this)">
     <label for="hepa_yes">Yes</label>
-    <input type="number" step=0.01 id="hepa_amount" name="hepa_amount" placeholder="(m³ / hour)" min="0">
+    <input type="number" step="any" id="hepa_amount" name="hepa_amount" placeholder="(m³ / hour)" min="0">
     <hr width="80%">
 
     <b>Face masks:</b>