diff --git a/README.org b/README.org
index ec9e0c9..777881f 100644
--- a/README.org
+++ b/README.org
@@ -41,3 +41,21 @@ Functional groups
 | S-185   | Spring Reverb              |         |            |           |             |
 | S-186   | PT2399 Echo/Delay          |   0.2.0 | x          | x         |             |
 | S-190   | Panning Audio Mixer        |   0.1.0 | x          |           |             |
+
+* Misc
+
+** Eurorack Panel Calculator 
+
+#+name: Eurorack Panel Calculator
+#+begin_src python :results output :var hp=4
+width = (hp * 5.08) - 0.3
+u = 3
+height = (u * 44.45) - 4.8
+hole_distance = (u * 44.45) - 10.85
+print("A %dU %dhp panel is %1.2fmm x %1.2fmm" % (u, hp, height, width))
+print("The Holes are %1.2fmm appart" % hole_distance)
+#+end_src
+
+#+RESULTS: Eurorack Panel Calculator
+: A 3U 4hp panel is 128.55mm x 20.02mm
+: The Holes are 122.50mm appart