diff --git a/CHANGELOG b/CHANGELOG
index c8661eec5..e7bb8e99a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -31,6 +31,7 @@ Motions:
 - Added recommendations for motions.
 - Changed label of former state "commited a bill" to "refered to committee".
 - Added options to calculate percentages on different bases.
+- Added majority calculation.
 
 Users:
 - Added field is_committee and new default group Committees.
diff --git a/openslides/core/config.py b/openslides/core/config.py
index 84ece613a..3ea38db27 100644
--- a/openslides/core/config.py
+++ b/openslides/core/config.py
@@ -12,7 +12,9 @@ INPUT_TYPE_MAPPING = {
     'choice': str,
     'comments': list,
     'colorpicker': str,
-    'datetimepicker': int}
+    'datetimepicker': int,
+    'majorityMethod': str,
+}
 
 
 class ConfigHandler:
diff --git a/openslides/core/static/js/core/site.js b/openslides/core/static/js/core/site.js
index ea3c85529..20274ee22 100644
--- a/openslides/core/static/js/core/site.js
+++ b/openslides/core/static/js/core/site.js
@@ -5,6 +5,7 @@
 // The core module for the OpenSlides site
 angular.module('OpenSlidesApp.core.site', [
     'OpenSlidesApp.core',
+    'OpenSlidesApp.poll.majority',
     'ui.router',
     'angular-loading-bar',
     'colorpicker.module',
@@ -424,7 +425,7 @@ angular.module('OpenSlidesApp.core.site', [
     'Config',
     'gettextCatalog',
     function($parse, Config, gettextCatalog) {
-        function getHtmlType(type) {
+        var getHtmlType = function (type) {
             return {
                 string: 'text',
                 text: 'textarea',
@@ -434,8 +435,9 @@ angular.module('OpenSlidesApp.core.site', [
                 comments: 'comments',
                 colorpicker: 'colorpicker',
                 datetimepicker: 'datetimepicker',
+                majorityMethod: 'choice',
             }[type];
-        }
+        };
 
         return {
             restrict: 'E',
@@ -585,11 +587,12 @@ angular.module('OpenSlidesApp.core.site', [
 // Config Controller
 .controller('ConfigCtrl', [
     '$scope',
+    'MajorityMethodChoices',
     'Config',
     'configOptions',
     'gettextCatalog',
     'DateTimePickerTranslation',
-    function($scope, Config, configOptions, gettextCatalog, DateTimePickerTranslation) {
+    function($scope, MajorityMethodChoices, Config, configOptions, gettextCatalog, DateTimePickerTranslation) {
         Config.bindAll({}, $scope, 'configs');
         $scope.configGroups = configOptions.data.config_groups;
         $scope.dateTimePickerTranslatedButtons = DateTimePickerTranslation.getButtons();
@@ -600,7 +603,7 @@ angular.module('OpenSlidesApp.core.site', [
             Config.save(key);
         };
 
-        /* For comments input */
+        // For comments input
         $scope.addComment = function (key, parent) {
             parent.value.push({
                 name: gettextCatalog.getString('New'),
@@ -612,6 +615,26 @@ angular.module('OpenSlidesApp.core.site', [
             parent.value.splice(index, 1);
             $scope.save(key, parent.value);
         };
+
+        // For majority method
+        angular.forEach(
+            _.filter($scope.configGroups, function (configGroup) {
+                return configGroup.name === 'Motions' || configGroup.name === 'Elections';
+            }),
+            function (configGroup) {
+                var configItem;
+                _.forEach(configGroup.subgroups, function (subgroup) {
+                    configItem = _.find(subgroup.items, ['input_type', 'majorityMethod']);
+                    if (configItem !== undefined) {
+                        // Break the forEach loop if we found something.
+                        return false;
+                    }
+                });
+                if (configItem !== undefined) {
+                    configItem.choices = MajorityMethodChoices;
+                }
+            }
+        );
     }
 ])
 
diff --git a/openslides/motions/config_variables.py b/openslides/motions/config_variables.py
index d20931614..8c67dc4cf 100644
--- a/openslides/motions/config_variables.py
+++ b/openslides/motions/config_variables.py
@@ -186,6 +186,17 @@ def get_config_variables():
         group='Motions',
         subgroup='Voting and ballot papers')
 
+    # TODO: Add server side validation of the choices.
+    yield ConfigVariable(
+        name='motions_poll_default_majority_method',
+        default_value='simple_majority',
+        input_type='majorityMethod',
+        label='Required majority',
+        help_text='Default method to check whether a motion has reached the required majority.',
+        weight=357,
+        group='Motions',
+        subgroup='Voting and ballot papers')
+
     yield ConfigVariable(
         name='motions_pdf_ballot_papers_selection',
         default_value='CUSTOM_NUMBER',
diff --git a/openslides/motions/static/js/motions/site.js b/openslides/motions/static/js/motions/site.js
index a2c187a4c..902db5685 100644
--- a/openslides/motions/static/js/motions/site.js
+++ b/openslides/motions/static/js/motions/site.js
@@ -6,6 +6,7 @@ angular.module('OpenSlidesApp.motions.site', [
     'OpenSlidesApp.motions',
     'OpenSlidesApp.motions.diff',
     'OpenSlidesApp.motions.motionservices',
+    'OpenSlidesApp.poll.majority',
     'OpenSlidesApp.core.pdf',
     'OpenSlidesApp.motions.pdf'
 ])
@@ -479,6 +480,54 @@ angular.module('OpenSlidesApp.motions.site', [
     }
 ])
 
+// Cache for MotionPollDetailCtrl so that users choices are keeped during user actions (e. g. save poll form).
+.value('MotionPollDetailCtrlCache', {})
+
+// Child controller of MotionDetailCtrl for each single poll.
+.controller('MotionPollDetailCtrl', [
+    '$scope',
+    'MajorityMethodChoices',
+    'MotionMajority',
+    'Config',
+    'MotionPollDetailCtrlCache',
+    function ($scope, MajorityMethodChoices, MotionMajority, Config, MotionPollDetailCtrlCache) {
+        // Define choices.
+        $scope.methodChoices = MajorityMethodChoices;
+        // TODO: Get $scope.baseChoices from config_variables.py without copying them.
+
+        // Setup empty cache with default values.
+        if (MotionPollDetailCtrlCache[$scope.poll.id] === undefined) {
+            MotionPollDetailCtrlCache[$scope.poll.id] = {
+                isMajorityCalculation: true,
+                isMajorityDetails: false,
+                method: $scope.config('motions_poll_default_majority_method'),
+                base: $scope.config('motions_poll_100_percent_base')
+            };
+        }
+
+        // Fetch users choices from cache.
+        $scope.isMajorityCalculation = MotionPollDetailCtrlCache[$scope.poll.id].isMajorityCalculation;
+        $scope.isMajorityDetails = MotionPollDetailCtrlCache[$scope.poll.id].isMajorityDetails;
+        $scope.method = MotionPollDetailCtrlCache[$scope.poll.id].method;
+        $scope.base = MotionPollDetailCtrlCache[$scope.poll.id].base;
+
+        // Define result function.
+        $scope.isReached = function () {
+            return MotionMajority.isReached($scope.base, $scope.method, $scope.poll);
+        };
+
+        // Save current values to cache on detroy of this controller.
+        $scope.$on('$destroy', function() {
+            MotionPollDetailCtrlCache[$scope.poll.id] = {
+                isMajorityCalculation: $scope.isMajorityCalculation,
+                isMajorityDetails: $scope.isMajorityDetails,
+                method: $scope.method,
+                base: $scope.base
+            };
+        });
+    }
+])
+
 .controller('MotionListCtrl', [
     '$scope',
     '$state',
@@ -1594,6 +1643,12 @@ angular.module('OpenSlidesApp.motions.site', [
         gettext('All valid ballots');
         gettext('All casted ballots');
         gettext('Disabled (no percents)');
+        gettext('Required majority');
+        gettext('Default method to check whether a motion has reached the required majority.');
+        gettext('Simple majority');
+        gettext('Two-thirds majority');
+        gettext('Three-quarters majority');
+        gettext('Disabled');
         gettext('Number of ballot papers (selection)');
         gettext('Number of all delegates');
         gettext('Number of all participants');
diff --git a/openslides/motions/static/templates/motions/motion-detail.html b/openslides/motions/static/templates/motions/motion-detail.html
index 5c2650bdb..337b06c32 100644
--- a/openslides/motions/static/templates/motions/motion-detail.html
+++ b/openslides/motions/static/templates/motions/motion-detail.html
@@ -163,14 +163,16 @@
       <div class="col-md-4">
           <h3 ng-if="motion.polls.length > 0" translate>Voting result</h3>
           <ol>
-            <li ng-repeat="poll in motion.polls" class="spacer"
+            <li ng-controller="MotionPollDetailCtrl" ng-repeat="poll in motion.polls" class="spacer"
                 ng-if="poll.has_votes || operator.hasPerms('motions.can_manage')">
               <strong translate-comment='ballot of a motion' translate>Vote</strong>
+
               <!-- Edit poll -->
               <button os-perms="motions.can_manage" ng-click="openPollDialog(poll, $index+1)"
                   class="btn btn-default btn-xs" title="{{ 'Edit' | translate }}">
                 <i class="fa fa-pencil"></i>
               </button>
+
               <!-- Delete poll -->
               <button os-perms="motions.can_manage" class="btn btn-default btn-xs"
                   ng-bootbox-confirm="{{ 'Are you sure you want to delete this poll?' | translate }}"
@@ -178,14 +180,25 @@
                   title="{{ 'Delete' | translate }}">
                 <i class="fa fa-times"></i>
               </button>
-              <!-- print poll PDF -->
-              <a ng-click="makePollPDF()" class="btn btn-default btn-xs"
+
+              <!-- Print poll PDF -->
+              <a os-perms="motions.can_manage" ng-click="makePollPDF()" class="btn btn-default btn-xs"
                   title="{{ 'Print ballot paper' | translate }}">
                 <i class="fa fa-file-pdf-o"></i>
               </a>
-              <!-- template hook for motion poll buttons -->
+
+              <!-- Template hook for motion poll buttons -->
               <template-hook hook-name="motionPollSmallButtons"></template-hook>
 
+              <!-- Settings for majority calculations -->
+              <div os-perms="motions.can_manage" ng-hide="config('motions_poll_default_majority_method') == 'disabled'" ng-cloak>
+                <div class="input-group">
+                  <span><translate>Required majority</translate>: </span>
+                  <select ng-init="config('motions_poll_default_majority_method')" ng-model="$parent.method"
+                      ng-options="option.value as option.display_name for option in methodChoices" />
+                </div>
+              </div>
+
               <!-- Poll results -->
               <div ng-show="poll.has_votes" class="pollresults">
                 <table class="table">
@@ -252,6 +265,17 @@
                       <span class="result_value">
                         {{ votesCast.value }} {{ votesCast.percentStr }}
                       </span>
+                  <!-- majority calculation -->
+                  <tr os-perms="motions.can_manage" ng-hide="method == 'disabled'">
+                    <td class="icon">
+                    <td>
+                      <span class="text-warning"  ng-if="isReached() === undefined" translate>Calculation impossible</span>
+                      <span class="text-success" ng-if="isReached() >= 0" translate>
+                        Quorum reached, {{ isReached() }} votes more than needed.
+                      </span>
+                      <span class="text-danger" ng-if="isReached() < 0" translate>
+                        Quorum not reached, {{ -(isReached()) }} <translate>votes missing.
+                     </span>
                 </table>
           </ol>
           <button ng-if="motion.isAllowed('create_poll')" ng-click="create_poll()" class="btn btn-default btn-sm">
diff --git a/openslides/poll/static/js/poll/majority.js b/openslides/poll/static/js/poll/majority.js
new file mode 100644
index 000000000..d2dd2e1e1
--- /dev/null
+++ b/openslides/poll/static/js/poll/majority.js
@@ -0,0 +1,85 @@
+(function () {
+
+'use strict';
+
+angular.module('OpenSlidesApp.poll.majority', [])
+
+.value('MajorityMethodChoices', [
+    {'value': 'simple_majority', 'display_name': 'Simple majority'},
+    {'value': 'two-thirds_majority', 'display_name': 'Two-thirds majority'},
+    {'value': 'three-quarters_majority', 'display_name': 'Three-quarters majority'},
+    {'value': 'disabled', 'display_name': 'Disabled'},
+])
+
+.factory('MajorityMethods', [
+    function () {
+        return {
+            'simple_majority': function (vote, base) {
+                return Math.ceil(-(base / 2 - vote)) - 1;
+            },
+            'two-thirds_majority': function (vote, base) {
+                var result = -(base * 2 - vote * 3) / 3;
+                if (result % 1 !== 0) {
+                    result = Math.ceil(result) - 1;
+                }
+                return result;
+            },
+            'three-quarters_majority': function (vote, base) {
+                var result = -(base * 3 - vote * 4) / 4;
+                if (result % 1 !== 0) {
+                    result = Math.ceil(result) - 1;
+                }
+                return result;
+            },
+            'disabled': function () {
+                return undefined;
+            },
+        };
+    }
+])
+
+.factory('MotionMajority', [
+    'MajorityMethods',
+    function (MajorityMethods) {
+        return {
+            isReached: function (base, method, votes) {
+                var methodFunction = MajorityMethods[method];
+                var yes = parseInt(votes.yes);
+                var no = parseInt(votes.no);
+                var abstain = parseInt(votes.abstain);
+                var valid = parseInt(votes.votesvalid);
+                var cast = parseInt(votes.votescast);
+                var result;
+                var isValid = function (vote) {
+                    return !isNaN(vote) && vote >= 0;
+                };
+                switch (base) {
+                    case 'YES_NO_ABSTAIN':
+                        if (isValid(yes) && isValid(no) && isValid(abstain)) {
+                            result = methodFunction(yes, yes + no + abstain);
+                        }
+                        break;
+                    case 'YES_NO':
+                        if (isValid(yes) && isValid(no)) {
+                            result = methodFunction(yes, yes + no);
+                        }
+                        break;
+                    case 'VALID':
+                        if (isValid(yes) && isValid(valid)) {
+                            result = methodFunction(yes, valid);
+                        }
+                        break;
+                    case 'CAST':
+                        if (isValid(yes) && isValid(cast)) {
+                            result = methodFunction(yes, cast);
+                        }
+                        break;
+                    // case 'DISABLED': result remains undefined
+                }
+                return result;
+            },
+        };
+    }
+]);
+
+}());
diff --git a/tests/integration/core/test_viewset.py b/tests/integration/core/test_viewset.py
index c1a803fa6..918ea1846 100644
--- a/tests/integration/core/test_viewset.py
+++ b/tests/integration/core/test_viewset.py
@@ -143,5 +143,5 @@ class TestConfigDBQueries(TestCase):
 
         TODO: The last 57 requests are a bug.
         """
-        with self.assertNumQueries(60):
+        with self.assertNumQueries(61):
             self.client.get(reverse('config-list'))