diff --git a/defaults.go b/defaults.go
index 626a547..fc69d0e 100644
--- a/defaults.go
+++ b/defaults.go
@@ -2,6 +2,7 @@ package chart
 
 import (
 	"sync"
+	"time"
 
 	"github.com/golang/freetype/truetype"
 	"github.com/wcharczuk/go-chart/drawing"
@@ -57,6 +58,8 @@ const (
 	DefaultDateFormat = "2006-01-02"
 	// DefaultDateHourFormat is the date format for hour timestamp formats.
 	DefaultDateHourFormat = "01-02 3PM"
+	// DefaultDateMinuteFormat is the date format for minute range timestamp formats.
+	DefaultDateMinuteFormat = time.Kitchen
 	// DefaultFloatFormat is the default float format.
 	DefaultFloatFormat = "%.2f"
 	// DefaultPercentValueFormat is the default percent format.
diff --git a/examples/response_times/main.go b/examples/response_times/main.go
new file mode 100644
index 0000000..04f77b7
--- /dev/null
+++ b/examples/response_times/main.go
@@ -0,0 +1,294 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/wcharczuk/go-chart"
+	"github.com/wcharczuk/go-chart/drawing"
+)
+
+func drawChart(res http.ResponseWriter, req *http.Request) {
+	xv, yv := data()
+
+	times := chart.TimeSeries{
+		Name:    "Elapsed ms",
+		XValues: xv,
+		YValues: yv,
+	}
+
+	tma := chart.SMASeries{
+		Style: chart.Style{
+			Show:            true,
+			StrokeColor:     drawing.ColorRed,
+			StrokeDashArray: []float64{5.0, 5.0},
+		},
+		InnerSeries: times,
+		Period:      50,
+	}
+
+	graph := chart.Chart{
+		XAxis: chart.XAxis{
+			Style:          chart.Style{Show: true},
+			ValueFormatter: chart.TimeMinuteValueFormatter,
+		},
+		YAxis: chart.YAxis{
+			Style: chart.Style{Show: true},
+			ValueFormatter: func(v interface{}) string {
+				if typed, isTyped := v.(float64); isTyped {
+					return fmt.Sprintf("%0.2fms", typed)
+				}
+				return ""
+			},
+		},
+		Series: []chart.Series{
+			times,
+			tma,
+		},
+	}
+
+	res.Header().Set("Content-Type", "image/svg+xml")
+	graph.Render(chart.SVG, res)
+}
+
+func main() {
+	http.HandleFunc("/", drawChart)
+	http.ListenAndServe(":8080", nil)
+}
+
+func data() ([]time.Time, []float64) {
+	var timestamps []time.Time
+	var elapsed []float64
+
+	scanner := bufio.NewScanner(bytes.NewBuffer([]byte(rawData)))
+	scanner.Split(bufio.ScanLines)
+	for scanner.Scan() {
+		pieces := strings.Split(scanner.Text(), ",")
+
+		hour, _ := strconv.Atoi(pieces[0])
+		minute, _ := strconv.Atoi(pieces[1])
+		second, _ := strconv.Atoi(pieces[2])
+
+		now := time.Now().UTC()
+		timestamps = append(timestamps, time.Date(now.Year(), now.Month(), now.Day(), hour, minute, second, 0, time.UTC))
+
+		parsedElapsed, err := strconv.ParseFloat(pieces[3], 64)
+		if err == nil {
+			elapsed = append(elapsed, parsedElapsed/1000.0)
+		} else {
+			println(err.Error())
+		}
+	}
+	return timestamps, elapsed
+}
+
+var (
+	rawData = `19,39,18,12667.583333333333
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+)
diff --git a/util.go b/util.go
index 8dbc0d8..77489c2 100644
--- a/util.go
+++ b/util.go
@@ -17,7 +17,7 @@ func (f Float) String() string {
 
 // TimeToFloat64 returns a float64 representation of a time.
 func TimeToFloat64(t time.Time) float64 {
-	return float64(t.Unix())
+	return float64(t.UnixNano())
 }
 
 // MinAndMax returns both the min and max in one pass.
diff --git a/value_formatter.go b/value_formatter.go
index a13ddaa..1a9afba 100644
--- a/value_formatter.go
+++ b/value_formatter.go
@@ -18,16 +18,21 @@ func TimeHourValueFormatter(v interface{}) string {
 	return TimeValueFormatterWithFormat(v, DefaultDateHourFormat)
 }
 
+// TimeMinuteValueFormatter is a ValueFormatter for timestamps.
+func TimeMinuteValueFormatter(v interface{}) string {
+	return TimeValueFormatterWithFormat(v, DefaultDateMinuteFormat)
+}
+
 // TimeValueFormatterWithFormat is a ValueFormatter for timestamps with a given format.
 func TimeValueFormatterWithFormat(v interface{}, dateFormat string) string {
 	if typed, isTyped := v.(time.Time); isTyped {
 		return typed.Format(dateFormat)
 	}
 	if typed, isTyped := v.(int64); isTyped {
-		return time.Unix(typed, 0).Format(dateFormat)
+		return time.Unix(0, typed).Format(dateFormat)
 	}
 	if typed, isTyped := v.(float64); isTyped {
-		return time.Unix(int64(typed), 0).Format(dateFormat)
+		return time.Unix(0, int64(typed)).Format(dateFormat)
 	}
 	return ""
 }