diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 1c3d1a88..4c3e0dd1 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -10,6 +10,7 @@ This is an UNSTABLE release. It includes many experimental features, as well as
 * rugnux: `--model` validation now aligns the data to the model before scoring - the observed reflections are reindexed into the model's enantiomorph when the two differ only by hand (indistinguishable from merged intensities). A merohedral indexing ambiguity is resolved against the reference MTZ when one is given (so a whole campaign shares one indexing convention); only with a model and no reference does validation fall back to fitting each candidate reindexing and keeping the lowest R-free.
 * rugnux: De-novo symmetry - recover a genuine high-symmetry group whose data are imperfectly scaled. Such a merge's within-orbit chi² lands just past the self-consistency bound (each real symmetry step adds a little systematic scatter), right where a merohedral twin also lands, so the chi² ratio alone cannot separate them. The candidate is now rescued when the extra intensity-proportional systematic error it invokes stays small relative to the confirmed subgroup - a genuine symmetry step gains multiplicity without inflating the merge error model's b, whereas a twin forces non-equivalent reflections together and b balloons. Fixes cubic insulin (I23 instead of I222) with no change to any other crystal in the test battery, including the twins that must stay in their lower symmetry.
 * Docs: Document the French-Wilson amplitude estimation, R-free flagging, reference-based space-group/ambiguity resolution, and model-based validation/maps in CPU_DATA_ANALYSIS.md.
+* Frontend: The status-bar pill now shows a progress bar during detector calibration (previously only during measurement), and the calibration state and its button are labelled "Calibration"/"CALIBRATE" (the internal `Pedestal` state name is unchanged for back-compatibility).
 
 ### 1.0.0-rc.158
 This is an UNSTABLE release. It includes many experimental features, as well as many AI generated fixes. We recommend using rc.152 for production use.
diff --git a/frontend/src/components/StatusBar.tsx b/frontend/src/components/StatusBar.tsx
index e15fb578..d818b682 100644
--- a/frontend/src/components/StatusBar.tsx
+++ b/frontend/src/components/StatusBar.tsx
@@ -17,16 +17,15 @@ type MyProps = {
 }
 
 // A tight, strong palette: lime = good/running, coral = working/alarm (deeper = worse),
-// light-blue (sidebar) = neutral/idle-connection. Measuring is handled separately.
+// light-blue (sidebar) = neutral/idle-connection. Measuring and Pedestal are handled separately.
 const STATE_STYLE: Record<string, { fill: string; text: string }> = {
     Idle:      { fill: "secondary.main", text: "rgba(0,0,0,.87)" },   // lime + black text
     Busy:      { fill: deepOrange[300],  text: "rgba(0,0,0,.87)" },   // light coral
-    Pedestal:  { fill: deepOrange[300],  text: "rgba(0,0,0,.87)" },   // light coral
     Error:     { fill: deepOrange[700],  text: "#fff" },              // deep coral
     Inactive:  { fill: indigo[100],      text: "rgba(0,0,0,.87)" },   // sidebar light blue
 };
 
-// Fixed width so the pill fits the longest label ("Measuring · 100 %") and never
+// Fixed width so the pill fits the longest label ("Calibration · 100 %") and never
 // resizes as the state changes.
 const pillSx = {
     position: "relative", width: 200, height: 36, borderRadius: 999, overflow: "hidden",
@@ -57,16 +56,20 @@ function StatusChip({s}: {s?: broker_status}) {
             </Box>
         );
 
-    // Measuring: a light-blue (sidebar) track filled lime to the progress fraction,
-    // with black text that stays legible over both the track and the lime fill.
-    if (s.state === "Measuring") {
+    // Measuring and Pedestal both fill a light-blue (sidebar) track to the progress
+    // fraction, with black text legible over both track and fill. Measuring fills lime;
+    // Pedestal fills coral (matching its flat-pill colour elsewhere). The "Pedestal"
+    // state is shown as "Calibration" — the internal name is kept only for back-compat.
+    if (s.state === "Measuring" || s.state === "Pedestal") {
         const pct = Math.max(0, Math.min(100, (s.progress ?? 0) * 100.0));
+        const fill = s.state === "Measuring" ? "secondary.main" : deepOrange[300];
+        const label = s.state === "Measuring" ? "Measuring" : "Calibration";
         return (
             <Box sx={{...pillSx, bgcolor: indigo[100]}}>
                 <Box sx={{position: "absolute", left: 0, top: 0, bottom: 0, width: `${pct}%`,
-                          bgcolor: "secondary.main", transition: "width .4s ease"}}/>
+                          bgcolor: fill, transition: "width .4s ease"}}/>
                 <Typography component="span" sx={{...pillLabelSx, color: "rgba(0,0,0,.87)"}}>
-                    Measuring · {pct.toFixed(0)} %
+                    {label} · {pct.toFixed(0)} %
                 </Typography>
             </Box>
         );
@@ -114,7 +117,7 @@ function StatusBar({s, onMenuClick}: MyProps) {
                     {...TIER[cancelTier]}
                 />
                 <ButtonWithSnackbar
-                    text={"Pedestal"}
+                    text={"Calibrate"}
                     path={"/pedestal"}
                     disabled={!pedestalActive}
                     {...(pedestalActive ? TIER.active : TIER.off)}