diff --git a/frontend/src/tools/devtools.jsx b/frontend/src/tools/devtools.jsx
index 2a7b510..3bd7837 100644
--- a/frontend/src/tools/devtools.jsx
+++ b/frontend/src/tools/devtools.jsx
@@ -309,7 +309,7 @@ function ElektroSection({ title, children }) {
 // ── Elektro-Rechner ───────────────────────────────────────────────────────────
 function ElektroRechner({ mobile }) {
   const [vals, setVals] = useState({});
-  const [preis, setPreis] = useState('0.30');
+  const [preis, setPreis] = useState('0.38');
 
   const n   = k => { const v = parseFloat(vals[k]); return isNaN(v) ? null : v; };
   const fmt = (v, unit, digits=3) => v == null ? '—' : `${parseFloat(v.toPrecision(digits))} ${unit}`;