diff --git a/README.md b/README.md
index 33d8914..ce61c4e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,20 @@
 # timeconverter
 convert timestamps to local time or specified timezone
+
+## usage
+```
+timeconverter [options] <command>
+
+Options
+  -format string
+        format to use (default "Mon 2006 Jan 02 03:04pm MST")
+  -location string
+        tzdata location to convert to (default "Local")
+  -version
+        print version number and exit
+Commands
+  help    -> show this help
+  version -> print version number and exit
+  <value> -> string with timestamps in it
+  -       -> pipe input with timestamps from stdin
+```