diff --git a/lib/microwaveprop_web/live/contact_live/show.ex b/lib/microwaveprop_web/live/contact_live/show.ex
index 2202217d..2f1392de 100644
--- a/lib/microwaveprop_web/live/contact_live/show.ex
+++ b/lib/microwaveprop_web/live/contact_live/show.ex
@@ -721,6 +721,9 @@ defmodule MicrowavepropWeb.ContactLive.Show do
             <.icon name="hero-flag" class="w-4 h-4" />
             {if @contact.flagged_invalid, do: "Unflag", else: "Flag as Invalid"}
           </button>
+          <.link navigate={path_calc_url(@contact)} class="btn btn-sm btn-outline">
+            <.icon name="hero-calculator" class="w-4 h-4" /> Open in Path Calculator
+          </.link>
           <.link navigate={~p"/contacts"} class="btn btn-sm btn-ghost">
             <.icon name="hero-arrow-left" class="w-4 h-4" /> Back to Contacts
           </.link>
@@ -2045,4 +2048,26 @@ defmodule MicrowavepropWeb.ContactLive.Show do
       true -> "badge badge-sm badge-ghost"
     end
   end
+
+  defp path_calc_url(contact) do
+    source = prefer_grid(contact.grid1, contact.station1)
+    dest = prefer_grid(contact.grid2, contact.station2)
+
+    params = maybe_put_band(%{"source" => source, "destination" => dest}, contact.band)
+
+    "/path?" <> URI.encode_query(params)
+  end
+
+  defp prefer_grid(grid, _fallback) when is_binary(grid) and grid != "", do: grid
+  defp prefer_grid(_grid, fallback), do: fallback || ""
+
+  defp maybe_put_band(params, nil), do: params
+
+  defp maybe_put_band(params, %Decimal{} = band) do
+    Map.put(params, "band", Decimal.to_string(band, :normal))
+  end
+
+  defp maybe_put_band(params, band) when is_integer(band), do: Map.put(params, "band", Integer.to_string(band))
+  defp maybe_put_band(params, band) when is_binary(band), do: Map.put(params, "band", band)
+  defp maybe_put_band(params, _), do: params
 end