diff --git a/src/Invoice/Renderer/AbstractRenderer.php b/src/Invoice/Renderer/AbstractRenderer.php
index a41e5753..412d1867 100644
--- a/src/Invoice/Renderer/AbstractRenderer.php
+++ b/src/Invoice/Renderer/AbstractRenderer.php
@@ -89,4 +89,13 @@ abstract class AbstractRenderer
     {
         return $this->extension->duration($seconds);
     }
+
+    /**
+     * @param int $seconds
+     * @return mixed
+     */
+    protected function getFormattedDecimalDuration($seconds)
+    {
+        return $this->extension->durationDecimal($seconds);
+    }
 }
diff --git a/src/Invoice/Renderer/RendererTrait.php b/src/Invoice/Renderer/RendererTrait.php
index 443439b2..f4872c8c 100644
--- a/src/Invoice/Renderer/RendererTrait.php
+++ b/src/Invoice/Renderer/RendererTrait.php
@@ -74,6 +74,12 @@ trait RendererTrait
      */
     abstract protected function getFormattedDuration($seconds);
 
+    /**
+     * @param int $seconds
+     * @return mixed
+     */
+    abstract protected function getFormattedDecimalDuration($seconds);
+
     /**
      * @param InvoiceModel $model
      * @return array
@@ -93,6 +99,7 @@ trait RendererTrait
             'invoice.vat' => $model->getCalculator()->getVat(),
             'invoice.tax' => $this->getFormattedMoney($model->getCalculator()->getTax(), $currency),
             'invoice.total_time' => $this->getFormattedDuration($model->getCalculator()->getTimeWorked()),
+            'invoice.duration_decimal' => $this->getFormattedDecimalDuration($model->getCalculator()->getTimeWorked()),
             'invoice.total' => $this->getFormattedMoney($model->getCalculator()->getTotal(), $currency),
             'invoice.subtotal' => $this->getFormattedMoney($model->getCalculator()->getSubtotal(), $currency),
 
@@ -177,7 +184,7 @@ trait RendererTrait
         if (null !== $timesheet->getFixedRate()) {
             $rate = $timesheet->getFixedRate();
             $hourlyRate = $timesheet->getFixedRate();
-            $amount = 1;
+            $amount = 1; // FIXME fixed rates
         }
 
         if (empty($description)) {
@@ -206,6 +213,7 @@ trait RendererTrait
             'entry.total' => $this->getFormattedMoney($rate, $currency),
             'entry.currency' => $currency,
             'entry.duration' => $timesheet->getDuration(),
+            'entry.duration_decimal' => $this->getFormattedDecimalDuration($timesheet->getDuration()),
             'entry.duration_minutes' => number_format($timesheet->getDuration() / 60),
             'entry.begin' => $this->getFormattedDateTime($begin),
             'entry.begin_time' => $this->getFormattedTime($begin),
diff --git a/src/Twig/Extensions.php b/src/Twig/Extensions.php
index e33f7d92..b69ac408 100644
--- a/src/Twig/Extensions.php
+++ b/src/Twig/Extensions.php
@@ -63,6 +63,7 @@ class Extensions extends AbstractExtension
     {
         return [
             new TwigFilter('duration', [$this, 'duration']),
+            new TwigFilter('duration_decimal', [$this, 'durationDecimal']),
             new TwigFilter('money', [$this, 'money']),
             new TwigFilter('currency', [$this, 'currency']),
             new TwigFilter('country', [$this, 'country']),
@@ -102,6 +103,30 @@ class Extensions extends AbstractExtension
      * @return string
      */
     public function duration($duration, $format = null)
+    {
+        $duration = $this->getSecondsForDuration($duration);
+
+        if (null === $format) {
+            $format = $this->localeSettings->getDurationFormat();
+        }
+
+        return $this->formatDuration($duration, $format);
+    }
+
+    /**
+     * Transforms seconds into a decimal formatted duration string.
+     *
+     * @param int|Timesheet $duration
+     * @return string
+     */
+    public function durationDecimal($duration)
+    {
+        $duration = $this->getSecondsForDuration($duration);
+
+        return $this->getNumberFormatter()->format(number_format($duration / 3600, 2));
+    }
+
+    private function getSecondsForDuration($duration): int
     {
         if (null === $duration) {
             $duration = 0;
@@ -116,19 +141,15 @@ class Extensions extends AbstractExtension
             $duration = $seconds;
         }
 
-        return $this->formatDuration((int) $duration, $format);
+        return (int) $duration;
     }
 
-    protected function formatDuration(int $seconds, $format = null): string
+    protected function formatDuration(int $seconds, string $format): string
     {
         if ($seconds < 0) {
             return '?';
         }
 
-        if (null === $format) {
-            $format = $this->localeSettings->getDurationFormat();
-        }
-
         return $this->durationFormatter->format($seconds, $format);
     }
 
@@ -159,6 +180,33 @@ class Extensions extends AbstractExtension
         return Constants::HOMEPAGE . '/documentation/' . $url;
     }
 
+    private function initLocale()
+    {
+        $locale = $this->localeSettings->getLocale();
+
+        if ($this->locale === $locale) {
+            return;
+        }
+
+        $this->locale = $locale;
+        $this->numberFormatter = new NumberFormatter($locale, NumberFormatter::DECIMAL);
+        $this->moneyFormatter = new NumberFormatter($locale, NumberFormatter::CURRENCY);
+    }
+
+    private function getNumberFormatter(): NumberFormatter
+    {
+        $this->initLocale();
+
+        return $this->numberFormatter;
+    }
+
+    private function getMoneyFormatter(): NumberFormatter
+    {
+        $this->initLocale();
+
+        return $this->moneyFormatter;
+    }
+
     /**
      * @param float $amount
      * @param string $currency
@@ -166,19 +214,11 @@ class Extensions extends AbstractExtension
      */
     public function money($amount, $currency = null)
     {
-        $locale = $this->localeSettings->getLocale();
-
-        if ($this->locale !== $locale) {
-            $this->locale = $locale;
-            $this->numberFormatter = new NumberFormatter($locale, NumberFormatter::DECIMAL);
-            $this->moneyFormatter = new NumberFormatter($locale, NumberFormatter::CURRENCY);
-        }
-
         if (null !== $currency) {
-            return $this->moneyFormatter->formatCurrency($amount, $currency);
+            return $this->getMoneyFormatter()->formatCurrency($amount, $currency);
         }
 
-        return $this->numberFormatter->format($amount);
+        return $this->getNumberFormatter()->format($amount);
     }
 
     /**
diff --git a/templates/invoice/index.html.twig b/templates/invoice/index.html.twig
index b431e2d1..42ea7a79 100644
--- a/templates/invoice/index.html.twig
+++ b/templates/invoice/index.html.twig
@@ -45,7 +45,7 @@
             {% set duration = entry.duration|duration %}
             {% if entry.fixedRate is not null %}
                 {% set rate = entry.fixedRate %}
-                {% set duration = 1 %}
+                {% set duration = 1 %}{# FIXME fixed rates #}
             {% elseif entry.hourlyRate is not null %}
                 {% set rate = entry.hourlyRate %}
             {% else %}
diff --git a/templates/invoice/renderer/default.html.twig b/templates/invoice/renderer/default.html.twig
index 4f9fcb07..a8382bd7 100644
--- a/templates/invoice/renderer/default.html.twig
+++ b/templates/invoice/renderer/default.html.twig
@@ -67,7 +67,7 @@
                 {% set duration = entry.duration|duration %}
                 {% if entry.fixedRate is not null %}
                     {% set rate = entry.fixedRate %}
-                    {% set duration = 1 %}
+                    {% set duration = 1 %}{# FIXME fixed rates #}
                 {% elseif entry.hourlyRate is not null %}
                     {% set rate = entry.hourlyRate %}
                 {% else %}
diff --git a/templates/invoice/renderer/freelancer.html.twig b/templates/invoice/renderer/freelancer.html.twig
index 096c3344..f4f08293 100644
--- a/templates/invoice/renderer/freelancer.html.twig
+++ b/templates/invoice/renderer/freelancer.html.twig
@@ -80,7 +80,7 @@
                     {% set duration = entry.duration|duration %}
                     {% if entry.fixedRate is not null %}
                         {% set rate = entry.fixedRate %}
-                        {% set duration = 1 %}
+                        {% set duration = 1 %}{# FIXME fixed rates #}
                     {% elseif entry.hourlyRate is not null %}
                         {% set rate = entry.hourlyRate %}
                     {% else %}
diff --git a/templates/invoice/renderer/timesheet.html.twig b/templates/invoice/renderer/timesheet.html.twig
index b7497edc..f2364dc9 100644
--- a/templates/invoice/renderer/timesheet.html.twig
+++ b/templates/invoice/renderer/timesheet.html.twig
@@ -86,6 +86,9 @@
             <tfoot>
             <tr>
                 <th></th>
+                {% if model.query.user is empty %}
+                <th></th>
+                {% endif %}
                 <th>{{ 'invoice.total_working_time'|trans }}</th>
                 <th>{{ model.calculator.timeWorked|duration }}</th>
             </tr>
diff --git a/tests/Invoice/Renderer/DebugRenderer.php b/tests/Invoice/Renderer/DebugRenderer.php
index 380273d6..e9c8db7d 100644
--- a/tests/Invoice/Renderer/DebugRenderer.php
+++ b/tests/Invoice/Renderer/DebugRenderer.php
@@ -80,6 +80,15 @@ class DebugRenderer implements RendererInterface
         return $seconds;
     }
 
+    /**
+     * @param mixed $seconds
+     * @return mixed
+     */
+    protected function getFormattedDecimalDuration($seconds)
+    {
+        return $seconds;
+    }
+
     /**
      * Render the given InvoiceDocument with the data from the InvoiceModel into a stupid array for testing only.
      *
diff --git a/tests/Invoice/Renderer/DebugRendererTest.php b/tests/Invoice/Renderer/DebugRendererTest.php
index d1790bb3..3d0aa4dc 100644
--- a/tests/Invoice/Renderer/DebugRendererTest.php
+++ b/tests/Invoice/Renderer/DebugRendererTest.php
@@ -61,6 +61,7 @@ class DebugRendererTest extends TestCase
             'invoice.vat',
             'invoice.tax',
             'invoice.total_time',
+            'invoice.duration_decimal',
             'invoice.total',
             'invoice.subtotal',
             'template.name',
@@ -126,6 +127,7 @@ class DebugRendererTest extends TestCase
             'entry.total',
             'entry.currency',
             'entry.duration',
+            'entry.duration_decimal',
             'entry.duration_minutes',
             'entry.begin',
             'entry.begin_time',
diff --git a/tests/Twig/ExtensionsTest.php b/tests/Twig/ExtensionsTest.php
index 9fd8bb6c..268afecb 100644
--- a/tests/Twig/ExtensionsTest.php
+++ b/tests/Twig/ExtensionsTest.php
@@ -50,7 +50,7 @@ class ExtensionsTest extends TestCase
 
     public function testGetFilters()
     {
-        $filters = ['duration', 'money', 'currency', 'country', 'docu_link'];
+        $filters = ['duration', 'duration_decimal', 'money', 'currency', 'country', 'docu_link'];
         $sut = $this->getSut($this->localeDe);
         $twigFilters = $sut->getFilters();
         $this->assertCount(count($filters), $twigFilters);
@@ -200,6 +200,33 @@ class ExtensionsTest extends TestCase
         $this->assertEquals('00:00 h', $sut->duration(null));
     }
 
+    public function testDurationDecimal()
+    {
+        $record = $this->getTimesheet(9437);
+
+        $sut = $this->getSut($this->localeEn);
+        $this->assertEquals('2.62', $sut->durationDecimal($record->getDuration()));
+
+        // test Timesheet object
+        $this->assertEquals('2.62', $sut->durationDecimal($record));
+
+        // test extended format
+        $sut = $this->getSut($this->localeDe, 'de');
+        $this->assertEquals('2,62', $sut->durationDecimal($record->getDuration()));
+
+        // test negative duration
+        $sut = $this->getSut($this->localeEn, 'en');
+        $this->assertEquals('0', $sut->durationDecimal('-1'));
+
+        // test zero duration
+        $sut = $this->getSut($this->localeEn, 'en');
+        $this->assertEquals('0', $sut->durationDecimal('0'));
+
+        $sut = $this->getSut($this->localeEn, 'en');
+
+        $this->assertEquals('0', $sut->durationDecimal(null));
+    }
+
     protected function getTimesheet($seconds)
     {
         $begin = new \DateTime();