diff --git a/README.md b/README.md
index 5415dc6..0adb47f 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ A little Go util to print duration strings in a human-friendly format
 
 The [String](https://godoc.org/github.com/davidbanham/human_duration#String) function takes a Duration and the precision that's important to the user.
 
-The allowed precisions are year, day, hour, minute and second
+The allowed precisions are year, week, day, hour, minute and second
 
 ## Usage
 
diff --git a/main.go b/main.go
index ad87716..2a36b1d 100644
--- a/main.go
+++ b/main.go
@@ -16,6 +16,7 @@ const (
 	Minute = "minute"
 	Hour   = "hour"
 	Day    = "day"
+	Week   = "week"
 	Year   = "year"
 )
 
@@ -29,6 +30,8 @@ func precisionToDuration(precision string) time.Duration {
 		return time.Hour
 	case Day:
 		return time.Hour * 24
+	case Week:
+		return time.Hour * 24 * 7
 	case Year:
 		return time.Hour * 24 * 365
 	default:
@@ -47,7 +50,8 @@ func StringCeiling(duration time.Duration, precision, ceiling string) string {
 
 func StringCeilingPadded(duration time.Duration, precision, ceiling string, padded bool) string {
 	years := int64(duration.Hours() / 24 / 365)
-	days := int64(math.Mod(float64(int64(duration.Hours()/24)), 365))
+	weeks := int64(math.Mod(float64(int64(duration.Hours()/24/7)), 52))
+	days := int64(math.Mod(float64(int64(duration.Hours()/24)), 365)) - (weeks * 7)
 	hours := int64(math.Mod(duration.Hours(), 24))
 	minutes := int64(math.Mod(duration.Minutes(), 60))
 	seconds := int64(math.Mod(duration.Seconds(), 60))
@@ -71,6 +75,10 @@ func StringCeilingPadded(duration time.Duration, precision, ceiling string, padd
 	case Day:
 		days = int64(float64(int64(duration.Hours() / 24)))
 		years = 0
+		weeks = 0
+	case Week:
+		weeks = int64(float64(int64(duration.Hours() / 24 / 7)))
+		years = 0
 	}
 
 	chunks := []struct {
@@ -78,6 +86,7 @@ func StringCeilingPadded(duration time.Duration, precision, ceiling string, padd
 		amount       int64
 	}{
 		{"year", years},
+		{"week", weeks},
 		{"day", days},
 		{"hour", hours},
 		{"minute", minutes},
@@ -133,6 +142,8 @@ func shorten(str string) string {
 	str = strings.Replace(str, "year", "y", 1)
 	str = strings.Replace(str, "days", "d", 1)
 	str = strings.Replace(str, "day", "d", 1)
+	str = strings.Replace(str, "weeks", "w", 1)
+	str = strings.Replace(str, "week", "w", 1)
 	str = strings.Replace(str, "hours", "h", 1)
 	str = strings.Replace(str, "hour", "h", 1)
 	str = strings.Replace(str, "minutes", "m", 1)
diff --git a/main_test.go b/main_test.go
index 0838009..25911f7 100644
--- a/main_test.go
+++ b/main_test.go
@@ -22,7 +22,7 @@ func ExampleString() {
 	fmt.Println(String(stop.Sub(start), Second))
 
 	// Output: 1 year 8 hours 33 minutes 24 seconds
-	// 1 year 33 days 1 hour 1 minute 1 second
+	// 1 year 4 weeks 5 days 1 hour 1 minute 1 second
 
 }
 
@@ -111,6 +111,11 @@ func TestString(t *testing.T) {
 			precision: "hours",
 			result:    "1 year 1 day 2 hours",
 		},
+		{
+			duration:  day * 14,
+			precision: "week",
+			result:    "2 weeks",
+		},
 	}
 
 	for _, fixture := range data {
@@ -158,6 +163,11 @@ func TestShortString(t *testing.T) {
 			precision: "second",
 			result:    "2y2d2m2s",
 		},
+		{
+			duration:  2*year + 16*day + 2*time.Minute + 2*time.Second,
+			precision: "second",
+			result:    "2y2w2d2m2s",
+		},
 	}
 
 	for _, fixture := range data {