diff --git a/lib/xmet/units.py b/lib/xmet/units.py
new file mode 100644
index 0000000..947de00
--- /dev/null
+++ b/lib/xmet/units.py
@@ -0,0 +1,16 @@
+import math
+
+def deg(rad: float) -> float:
+    return (rad * (180.0 / math.pi)) - 90
+
+def rad(deg: float) -> float:
+    return (deg + 90) * (math.pi / 180.0)
+
+def knots(ms: float) -> float:
+    return ms * 1.944
+
+def kelvin(c: float) -> float:
+    return 273.15 + c
+
+def celsius(k: float) -> float:
+    return k - 273.15