diff --git a/app/Bus/Commands/Metric/CreateMetricCommand.php b/app/Bus/Commands/Metric/CreateMetricCommand.php
index dc1ed90d..0a1cc82f 100644
--- a/app/Bus/Commands/Metric/CreateMetricCommand.php
+++ b/app/Bus/Commands/Metric/CreateMetricCommand.php
@@ -111,7 +111,7 @@ final class CreateMetricCommand
         'display_chart' => 'nullable|int',
         'places'        => 'nullable|int|between:0,4',
         'default_view'  => 'required|int|between:0,3',
-        'threshold'     => 'nullable|numeric|between:0,10',
+        'threshold'     => 'required|int',
         'order'         => 'nullable|int',
         'visible'       => 'required|int|between:0,2',
     ];
diff --git a/app/Bus/Commands/Metric/UpdateMetricCommand.php b/app/Bus/Commands/Metric/UpdateMetricCommand.php
index 55939afb..9ef77011 100644
--- a/app/Bus/Commands/Metric/UpdateMetricCommand.php
+++ b/app/Bus/Commands/Metric/UpdateMetricCommand.php
@@ -114,7 +114,7 @@ final class UpdateMetricCommand
         'display_chart' => 'nullable|int',
         'places'        => 'nullable|numeric|between:0,4',
         'default_view'  => 'nullable|numeric|between:0,4',
-        'threshold'     => 'nullable|numeric|between:0,10',
+        'threshold'     => 'nullable|int',
         'order'         => 'nullable|int',
         'visible'       => 'required|int|between:0,2',
     ];
diff --git a/app/Http/Controllers/Dashboard/MetricController.php b/app/Http/Controllers/Dashboard/MetricController.php
index d87fb436..94f8379d 100644
--- a/app/Http/Controllers/Dashboard/MetricController.php
+++ b/app/Http/Controllers/Dashboard/MetricController.php
@@ -45,7 +45,8 @@ class MetricController extends Controller
     public function showAddMetric()
     {
         return View::make('dashboard.metrics.add')
-            ->withPageTitle(trans('dashboard.metrics.add.title').' - '.trans('dashboard.dashboard'));
+            ->withPageTitle(trans('dashboard.metrics.add.title').' - '.trans('dashboard.dashboard'))
+            ->withAcceptableThresholds(Metric::ACCEPTABLE_THRESHOLDS);
     }
 
     /**
@@ -131,7 +132,8 @@ class MetricController extends Controller
     {
         return View::make('dashboard.metrics.edit')
             ->withPageTitle(trans('dashboard.metrics.edit.title').' - '.trans('dashboard.dashboard'))
-            ->withMetric($metric);
+            ->withMetric($metric)
+            ->withAcceptableThresholds(Metric::ACCEPTABLE_THRESHOLDS);
     }
 
     /**
diff --git a/app/Models/Metric.php b/app/Models/Metric.php
index 5ddeafc5..2e23f940 100644
--- a/app/Models/Metric.php
+++ b/app/Models/Metric.php
@@ -12,10 +12,12 @@
 namespace CachetHQ\Cachet\Models;
 
 use AltThree\Validator\ValidatingTrait;
+use AltThree\Validator\ValidationException;
 use CachetHQ\Cachet\Models\Traits\SortableTrait;
 use CachetHQ\Cachet\Presenters\MetricPresenter;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\MessageBag;
 use McCool\LaravelAutoPresenter\HasPresenter;
 
 class Metric extends Model implements HasPresenter
@@ -57,6 +59,13 @@ class Metric extends Model implements HasPresenter
      */
     const VISIBLE_HIDDEN = 2;
 
+    /**
+     * Array of acceptable threshold minutes.
+     *
+     * @var int[]
+     */
+    const ACCEPTABLE_THRESHOLDS = [1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60];
+
     /**
      * The model's attributes.
      *
@@ -200,6 +209,26 @@ class Metric extends Model implements HasPresenter
         return $this->display_chart;
     }
 
+    /**
+     * Validate the model before save.
+     *
+     * @throws \AltThree\Validator\ValidationException
+     *
+     * @return void
+     */
+    public function validate()
+    {
+        $messages = [];
+
+        if (60 % $this->threshold === 0) {
+            $messages[] = 'Threshold must be divisible by 60.';
+        }
+
+        if ($messages) {
+            throw new ValidationException(new MessageBag($messages));
+        }
+    }
+
     /**
      * Get the presenter class.
      *
diff --git a/resources/views/dashboard/metrics/add.blade.php b/resources/views/dashboard/metrics/add.blade.php
index 9cdf4ee6..4f5a0ca1 100644
--- a/resources/views/dashboard/metrics/add.blade.php
+++ b/resources/views/dashboard/metrics/add.blade.php
@@ -57,7 +57,11 @@
                     </div>
                     <div class="form-group">
                         <label for="metric-places">{{ trans('forms.metrics.threshold') }}</label>
-                        <input type="number" min="0" max="100" class="form-control" name="metric[threshold]" id="metric-threshold" required value="{{ Binput::old('metric.threshold') }}" placeholder="{{ trans('forms.metrics.threshold') }}">
+                        <select name="metric[threshold]" class="form-control" required>
+                            @foreach ($acceptable_thresholds as $threshold)
+                            <option {{ (int) Binput::old('metric.threshold') === $threshold ? 'selected' : null }}>{{ $threshold }}</option>
+                            @endforeach
+                        </select>
                     </div>
                     <div class="checkbox">
                         <label>
diff --git a/resources/views/dashboard/metrics/edit.blade.php b/resources/views/dashboard/metrics/edit.blade.php
index 88a7c756..40bff2d6 100644
--- a/resources/views/dashboard/metrics/edit.blade.php
+++ b/resources/views/dashboard/metrics/edit.blade.php
@@ -57,7 +57,11 @@
                     </div>
                     <div class="form-group">
                         <label for="metric-places">{{ trans('forms.metrics.threshold') }}</label>
-                        <input type="number" min="0" max="100" class="form-control" name="threshold" id="metric-threshold" required value="{{ $metric->threshold }}" placeholder="{{ trans('forms.metrics.threshold') }}">
+                        <select name="threshold" class="form-control" required>
+                            @foreach ($acceptable_thresholds as $threshold)
+                            <option {{ (int) Binput::old('metric.threshold') === $threshold || $metric->threshold === $threshold ? 'selected' : null }}>{{ $threshold }}</option>
+                            @endforeach
+                        </select>
                     </div>
                     <div class="checkbox">
                         <label>