diff --git a/cara/apps/calculator/model_generator.py b/cara/apps/calculator/model_generator.py
index 3965080f..9af4b866 100644
--- a/cara/apps/calculator/model_generator.py
+++ b/cara/apps/calculator/model_generator.py
@@ -97,7 +97,7 @@ class FormData:
         'infected_lunch_finish': '13:30',
         'infected_lunch_option': True,
         'infected_lunch_start': '12:30',
-        'infected_people': _NO_DEFAULT,
+        'infected_people': 1,
         'infected_start': '08:30',
         'mask_type': 'Type I',
         'mask_wearing_option': 'mask_off',
diff --git a/cara/apps/calculator/templates/calculator.form.html.j2 b/cara/apps/calculator/templates/calculator.form.html.j2
index aea8440f..82072a83 100644
--- a/cara/apps/calculator/templates/calculator.form.html.j2
+++ b/cara/apps/calculator/templates/calculator.form.html.j2
@@ -187,7 +187,7 @@ v{{ calculator_version }} <span style="float:right; font-weight:bold">Please sen
 
     <div class="row">
       <label class="col-xl-3 col-lg-4 col-sm-3 col-form-label">Number of infected people: </label>
-      <input type="number" id="infected_people" class="col-lg-4 col-md-5 col-sm-3" name="infected_people" min=1 required><br>
+      <input type="number" id="infected_people" class="col-lg-4 col-md-5 col-sm-3" name="infected_people" min=1 value=1 required><br>
     </div>
 
     <span id="training_limit_error" class="red_text" hidden>Training activities limited to 1 infected<br></span>