diff --git a/locust/templates/index.html b/locust/templates/index.html
index ed3c2515d7..441c3a7f17 100644
--- a/locust/templates/index.html
+++ b/locust/templates/index.html
@@ -30,7 +30,7 @@
                 {% if is_distributed %}
                     <div class="top_box box_slaves" id="box_slaves">
                         <div class="label">SLAVES</div>
-                        <div class="value" id="slaveCount">0</div>
+                        <div class="value" id="slaveCount">{{slave_count}}</div>
                     </div>
                 {% endif %}
                 <div class="top_box box_rps box_running" id="box_rps">
@@ -57,10 +57,16 @@
             <div class="padder">
                 <h2>Start new Locust swarm</h2>
                 <form action="./swarm" method="POST" id="swarm_form">
-                    <label for="locust_count">Number of users to simulate</label>
+                    <label for="locust_count">Number of total users to simulate</label>
                     <input type="text" name="locust_count" id="locust_count" class="val" /><br>
                     <label for="hatch_rate">Hatch rate <span style="color:#8a8a8a;">(users spawned/second)</span></label>
                     <input type="text" name="hatch_rate" id="hatch_rate" class="val" /><br>
+                    {% if is_step_load %}
+                    <label for="step_locust_count">Number of users to increase by step</label>
+                    <input type="text" name="step_locust_count" id="step_locust_count" class="val" /><br>
+                    <label for="step_duration">Step duration <span style="color:#8a8a8a;">(300s, 20m, 3h, 1h30m, etc.)</span></label>
+                    <input type="text" name="step_duration" id="step_duration" class="val" /><br>
+                    {% endif %}
                     <button type="submit">Start swarming</button>
                 </form>
                 <div style="clear:right;"></div>
@@ -78,6 +84,12 @@ <h2>Change the locust count</h2>
                     <input type="text" name="locust_count" id="new_locust_count" class="val" /><br>
                     <label for="hatch_rate">Hatch rate <span style="color:#8a8a8a;">(users spawned/second)</span></label>
                     <input type="text" name="hatch_rate" id="new_hatch_rate" class="val" /><br>
+                    {% if is_step_load %}
+                    <label for="step_locust_count">Number of users to increase by step</label>
+                    <input type="text" name="step_locust_count" id="step_locust_count" class="val" /><br>
+                    <label for="step_duration">Step duration <span style="color:#8a8a8a;">(300s, 20m, 3h, 1h30m, etc.)</span></label>
+                    <input type="text" name="step_duration" id="step_duration" class="val" /><br>
+                    {% endif %}
                     <button type="submit">Start swarming</button>
                 </form>
                 <div style="clear:right;"></div>
diff --git a/locust/web.py b/locust/web.py
index 88c9d16414..d7ce475c69 100644
--- a/locust/web.py
+++ b/locust/web.py
@@ -27,6 +27,7 @@
 from .stats import distribution_csv, failures_csv, median_from_dict, requests_csv, sort_stats
 from .util.cache import memoize
 from .util.rounding import proper_round
+from .util.time import parse_timespan
 
 logger = logging.getLogger(__name__)
 
@@ -40,11 +41,10 @@
 @app.route('/')
 def index():
     is_distributed = isinstance(runners.locust_runner, MasterLocustRunner)
+    slave_count = 0
     if is_distributed:
         slave_count = runners.locust_runner.slave_count
-    else:
-        slave_count = 0
-
+        
     if runners.locust_runner.host:
         host = runners.locust_runner.host
     elif len(runners.locust_runner.locust_classes) > 0:
@@ -52,20 +52,31 @@ def index():
     else:
         host = None
     
+    is_step_load = runners.locust_runner.step_load
+
     return render_template("index.html",
         state=runners.locust_runner.state,
         is_distributed=is_distributed,
         user_count=runners.locust_runner.user_count,
         version=version,
-        host=host
+        host=host,
+        slave_count=slave_count,
+        is_step_load=is_step_load
     )
 
 @app.route('/swarm', methods=["POST"])
 def swarm():
     assert request.method == "POST"
-
+    is_step_load = runners.locust_runner.step_load
     locust_count = int(request.form["locust_count"])
     hatch_rate = float(request.form["hatch_rate"])
+
+    if is_step_load:
+        step_locust_count = int(request.form["step_locust_count"])
+        step_duration = parse_timespan(str(request.form["step_duration"]))
+        runners.locust_runner.start_stepload(locust_count, hatch_rate, step_locust_count, step_duration)
+        return jsonify({'success': True, 'message': 'Swarming started in Step Load Mode'})
+    
     runners.locust_runner.start_hatching(locust_count, hatch_rate)
     return jsonify({'success': True, 'message': 'Swarming started'})