diff --git a/internal/handlers/overview.go b/internal/handlers/overview.go
index 57150bd..88a1aaa 100644
--- a/internal/handlers/overview.go
+++ b/internal/handlers/overview.go
@@ -2,6 +2,7 @@ package handlers
 
 import (
 	"net/http"
+	"strconv"
 
 	"lostcavewireplanner/internal/models"
 )
@@ -47,6 +48,11 @@ func (h *Handlers) RackCreate(w http.ResponseWriter, r *http.Request) {
 	rackType := r.FormValue("rack_type")
 	depth := r.FormValue("depth")
 	heightUnits := 42
+	if huStr := r.FormValue("height_units"); huStr != "" {
+		if n, err := strconv.Atoi(huStr); err == nil && n > 0 {
+			heightUnits = n
+		}
+	}
 
 	if name == "" {
 		h.renderError(w, "overview.html", "Name is required")
diff --git a/templates/overview.html b/templates/overview.html
index 44aea58..8be446d 100644
--- a/templates/overview.html
+++ b/templates/overview.html
@@ -21,6 +21,7 @@
     <label>Name <input name="name" required></label>
     <label>Type <select name="rack_type"><option value="network">Network</option><option value="server">Server</option></select></label>
     <label>Depth <select name="depth"><option value="shallow">Shallow</option><option value="deep">Deep</option></select></label>
+    <label>Height (U) <input type="number" name="height_units" value="42" min="1" style="width:6em"></label>
     <button type="submit">Create Rack</button>
 </form>
 </details>