diff --git a/dropbot/utils.py b/dropbot/utils.py
index 122ad34..66761fa 100644
--- a/dropbot/utils.py
+++ b/dropbot/utils.py
@@ -2,6 +2,36 @@ from hashlib import sha1
 import zlib
 import redis
 import logging
+import math
+
+
+def decimal_minutes_to_hms(minutes):
+    """Converts a value of decimal minutes into a hms format"""
+    if not isinstance(minutes, (int, float, long)):
+        if isinstance(minutes, basestring):
+            try:
+                minutes = float(minutes)
+            except ValueError:
+                raise ValueError('minutes is not a valid number')
+        else:
+            raise ValueError('minutes is not a valid number')
+
+    # If we have a negative number, invert
+    if minutes < 0:
+        minutes = -1 * minutes
+
+    out_secs = round(60 * (minutes % 1))
+    out_minutes = math.floor(minutes) % 60
+    out_hours = math.floor(math.floor(minutes) / 60)
+
+    output = ''
+    if out_hours > 0:
+        output += '{}h '.format(int(out_hours))
+    if out_minutes > 0:
+        output += '{}m '.format(int(out_minutes))
+    if out_secs > 0:
+        output += '{}s '.format(int(out_secs))
+    return output.strip()
 
 
 class EVEAPIRedisCache(object):
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..e85e691
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,60 @@
+import mock
+from unittest import TestCase
+from dropbot.utils import decimal_minutes_to_hms
+
+
+class DecimalToHMSTest(TestCase):
+    """
+    Tests the decimal_minutes_to_hms function
+    """
+
+    def test_seconds_only(self):
+        """Check seconds are calculated correctly"""
+        self.assertEqual(decimal_minutes_to_hms(0.5), '30s')
+        self.assertEqual(decimal_minutes_to_hms(0.75), '45s')
+        self.assertEqual(decimal_minutes_to_hms(0.25), '15s')
+        self.assertEqual(decimal_minutes_to_hms(0.56), '34s')
+        self.assertEqual(decimal_minutes_to_hms(0.57), '34s')
+        self.assertEqual(decimal_minutes_to_hms(0.58), '35s')
+
+    def test_full_minutes(self):
+        """Check minutes are correclty output"""
+        self.assertEqual(decimal_minutes_to_hms(1), '1m')
+        self.assertEqual(decimal_minutes_to_hms(10), '10m')
+        self.assertEqual(decimal_minutes_to_hms(30), '30m')
+
+    def test_minutes_and_seconds(self):
+        """Check minutes and seconds are correctly output"""
+        self.assertEqual(decimal_minutes_to_hms(1.5), '1m 30s')
+        self.assertEqual(decimal_minutes_to_hms(59.5), '59m 30s')
+        self.assertEqual(decimal_minutes_to_hms(5.25), '5m 15s')
+
+    def test_full_hours(self):
+        """Check hours are correctly output"""
+        self.assertEqual(decimal_minutes_to_hms(60), '1h')
+        self.assertEqual(decimal_minutes_to_hms(120), '2h')
+        self.assertEqual(decimal_minutes_to_hms(1440), '24h')
+
+    def test_hour_minutes_and_seconds(self):
+        """Check HMS are correctly output in the correct situations"""
+        self.assertEqual(decimal_minutes_to_hms(61.5), '1h 1m 30s')
+
+    def test_partial_seconds(self):
+        """Check that partial seconds are rounded to the nearest second"""
+        self.assertEqual(decimal_minutes_to_hms(4.56), '4m 34s')
+        self.assertEqual(decimal_minutes_to_hms(4.57), '4m 34s')
+        self.assertEqual(decimal_minutes_to_hms(4.58), '4m 35s')
+
+    def test_large_numbers(self):
+        self.assertEqual(decimal_minutes_to_hms(300000000000000), '5000000000000h')
+        self.assertEqual(decimal_minutes_to_hms(3000023423234.4), '50000390387h 14m 24s')
+
+    def test_negative_numbers(self):
+        self.assertEqual(decimal_minutes_to_hms(-1), '1m')
+        self.assertEqual(decimal_minutes_to_hms(-1.2), '1m 12s')
+
+    def test_invalid_input(self):
+        with self.assertRaises(ValueError):
+            decimal_minutes_to_hms('dsd')
+        with self.assertRaises(ValueError):
+            decimal_minutes_to_hms(mock.Mock())
\ No newline at end of file