diff --git a/README.MD b/README.MD
index b0620f8..14558ff 100644
--- a/README.MD
+++ b/README.MD
@@ -15,6 +15,7 @@ which are selectable options in dmenu.
 - `nic`              shows the status and/or the ip address of the network interface card
 - `temperature`      shows the current CPU temperature
 - `notes`            a simple one liner note taking tool, displaying notes in `dmenu`/`rofi`  
+- `calculate`        a calculator, utilising `qalculate` - inspired by [@fedops](https://codeberg.org/fedops/scripts)
 
 The next two do not work with `rofi` unless you have `alias dmenu=rofi` set, but they're pretty nice tools  
 
diff --git a/calculate.nim b/calculate.nim
new file mode 100644
index 0000000..ce692f8
--- /dev/null
+++ b/calculate.nim
@@ -0,0 +1,32 @@
+import base
+import std/[osproc,strutils,sequtils]
+
+#using qalc as it has a lot of nice inbuilt features
+#
+proc doCalculation(calc: string) =
+  var info = newInfo("Calculator")
+  let ans_cmd_terse = "echo \"" & calc & "\" | qalc +u8 -terse -color=never | awk '!/^>/ && !/^$/ {gsub(/^[ \\t]+|[ \\t]+$/, \"\", $0); print}'"
+  let ans_cmd_full = "echo \"" & calc & "\" | qalc +u8 -color=never | awk '!/^>/ && !/^$/ {gsub(/^[ \\t]+|[ \\t]+$/, \"\", $0); print}'"
+  let ans_full = execCmdEx(ans_cmd_full)
+  let ans_terse = execCmdEx(ans_cmd_terse)
+  let answers = @[strip(ans_terse.output),
+                  strip(ans_full.output)]
+  let args = concat(answers,@["exit"])
+  let cmd = outputData(info, args)
+  if cmd in answers:
+    discard execCmd("echo \"" & strip(cmd) & "\" | xclip")
+  elif cmd == "exit":
+    return
+  else:
+    doCalculation(cmd)
+
+proc main() =
+  var info = newInfo("Calculator")
+  let args = @["exit"]
+  let cmd = outputData(info, args)
+  if cmd != "":
+    doCalculation(cmd)
+  return
+
+if isMainModule:
+  main()
diff --git a/compile_all.sh b/compile_all.sh
old mode 100755
new mode 100644
diff --git a/fuzzytime.nim b/fuzzytime.nim
old mode 100755
new mode 100644
diff --git a/volume.nim b/volume.nim
old mode 100755
new mode 100644