diff --git a/client/src/Pages/StatusPage/Status/themes/shared/ChartCells.tsx b/client/src/Pages/StatusPage/Status/themes/shared/ChartCells.tsx
new file mode 100644
index 000000000..8e86c25c4
--- /dev/null
+++ b/client/src/Pages/StatusPage/Status/themes/shared/ChartCells.tsx
@@ -0,0 +1,113 @@
+import {
+	ThemedChartTooltip,
+	ThemedDailyTooltip,
+} from "@/Pages/StatusPage/Status/themes/shared/ThemedChartTooltip";
+import type { CheckSnapshot, DailyCheckBucket } from "@/Types/Check";
+import { MAX_RECENT_CHECKS } from "@/Types/Monitor";
+import {
+	computeBarHeights,
+	computeDayBarHeights,
+	MIN_HEIGHT_PCT,
+} from "@/Utils/DataUtils";
+import { formatPercentage } from "@/Utils/FormatUtils";
+import { enumerateDays, formatMs } from "@/Utils/TimeUtils";
+import type { TFunction } from "i18next";
+
+export type BarKind = "up" | "degraded" | "down" | "empty";
+export type HeatCellKind = "fast" | "med" | "slow" | "degraded" | "down" | "empty";
+
+export interface ChartCell {
+	key: string;
+	barKind: BarKind;
+	heatKind: HeatCellKind;
+	heightPct: number; // histogram bar height
+	responseTime: number; // 0 for empty cells
+	tooltip: React.ReactNode | null;
+	ariaLabel: string;
+}
+
+const DAY_DOWN_THRESHOLD = 0.5;
+
+const classifyDay = (bucket: DailyCheckBucket): BarKind => {
+	if (bucket.totalChecks === 0) return "empty";
+	const upRatio = bucket.upChecks / bucket.totalChecks;
+	if (upRatio >= 1) return "up";
+	if (upRatio < DAY_DOWN_THRESHOLD) return "down";
+	return "degraded";
+};
+
+export const classifyResponseTime = (
+	status: boolean,
+	responseTime: number | undefined
+): Exclude<HeatCellKind, "empty"> => {
+	if (!status) return "down";
+	const rt = responseTime ?? 0;
+	if (rt > 500) return "slow";
+	if (rt > 250) return "med";
+	return "fast";
+};
+
+const emptyCell = (key: string): ChartCell => ({
+	key,
+	barKind: "empty",
+	heatKind: "empty",
+	heightPct: MIN_HEIGHT_PCT,
+	responseTime: 0,
+	tooltip: null,
+	ariaLabel: "",
+});
+
+const padCells = (cells: ChartCell[], length: number): ChartCell[] => [
+	...cells,
+	...Array.from({ length: Math.max(0, length - cells.length) }, (_, i) =>
+		emptyCell(`empty-${cells.length + i}`)
+	),
+];
+
+export const checksToCells = (checks: CheckSnapshot[], t: TFunction): ChartCell[] => {
+	const source = checks.slice(-MAX_RECENT_CHECKS);
+	const heights = computeBarHeights(source);
+	const cells = source.map(
+		(check, i): ChartCell => ({
+			key: check.id ?? String(i),
+			barKind: check.status ? "up" : "down",
+			heatKind: classifyResponseTime(check.status, check.responseTime),
+			heightPct: heights[i] ?? MIN_HEIGHT_PCT,
+			responseTime: check.responseTime ?? 0,
+			tooltip: <ThemedChartTooltip check={check} />,
+			ariaLabel: `${formatMs(check.responseTime)}, ${check.status ? "up" : "down"}`,
+		})
+	);
+	return padCells(cells, MAX_RECENT_CHECKS);
+};
+
+export const dailyBucketsToCells = (
+	buckets: DailyCheckBucket[],
+	days: number,
+	bucketTimezone: string,
+	t: TFunction
+): ChartCell[] => {
+	const byDate = new Map(buckets.map((b) => [b.date, b]));
+	const heights = computeDayBarHeights(buckets);
+	const enumerated = enumerateDays(days, bucketTimezone);
+	return enumerated.map((date) => {
+		const bucket = byDate.get(date);
+		if (!bucket) return emptyCell(`day-${date}`);
+		const barKind = classifyDay(bucket);
+		return {
+			key: `day-${date}`,
+			barKind,
+			heatKind:
+				barKind === "up"
+					? classifyResponseTime(true, bucket.avgResponseTime ?? 0)
+					: barKind, // degraded/down days keep their outcome color in the heatmap too
+			heightPct: heights.get(date) ?? MIN_HEIGHT_PCT,
+			responseTime: bucket.avgResponseTime ?? 0, // null (no RT data that day) → 0, excluded from footer stats like empty cells
+			tooltip: <ThemedDailyTooltip bucket={bucket} />,
+			ariaLabel: t("pages.statusPages.monitorsList.chart.dayAria", {
+				date,
+				uptime: formatPercentage(bucket.upChecks / bucket.totalChecks),
+			}),
+		};
+	});
+};
diff --git a/client/src/Pages/StatusPage/Status/themes/shared/ThemedChartTooltip.tsx b/client/src/Pages/StatusPage/Status/themes/shared/ThemedChartTooltip.tsx
index bc3def0d4..8f6550460 100644
--- a/client/src/Pages/StatusPage/Status/themes/shared/ThemedChartTooltip.tsx
+++ b/client/src/Pages/StatusPage/Status/themes/shared/ThemedChartTooltip.tsx
@@ -1,7 +1,8 @@
-import type { CheckSnapshot } from "@/Types/Check";
+import type { CheckSnapshot, DailyCheckBucket } from "@/Types/Check";
 import Stack from "@mui/material/Stack";
 import Typography from "@mui/material/Typography";
 import { formatDateWithTz, formatMs } from "@/Utils/TimeUtils";
+import { formatPercentage } from "@/Utils/FormatUtils";
 import { useStatusPageTheme } from "@/Pages/StatusPage/Status/themes/StatusPageThemeProvider";
 import { useTranslation } from "react-i18next";
 
@@ -27,3 +28,37 @@ export const ThemedChartTooltip = ({ check }: { check: CheckSnapshot }) => {
 		</Stack>
 	);
 };
+
+export const ThemedDailyTooltip = ({ bucket }: { bucket: DailyCheckBucket }) => {
+	const { t } = useTranslation();
+	return (
+		<Stack gap={0.25}>
+			<Typography
+				variant="caption"
+				fontWeight={600}
+			>
+				{bucket.date}
+			</Typography>
+			<Typography
+				variant="caption"
+				sx={{ opacity: 0.8 }}
+			>
+				{t("pages.statusPages.monitorsList.chart.dayUptime", {
+					uptime: formatPercentage(bucket.upChecks / bucket.totalChecks),
+					upChecks: bucket.upChecks.toLocaleString(),
+					totalChecks: bucket.totalChecks.toLocaleString(),
+				})}
+			</Typography>
+			{bucket.avgResponseTime !== null && (
+				<Typography
+					variant="caption"
+					sx={{ opacity: 0.8 }}
+				>
+					{t("pages.statusPages.monitorsList.chart.dayAvgResponse", {
+						value: formatMs(bucket.avgResponseTime),
+					})}
+				</Typography>
+			)}
+		</Stack>
+	);
+};
diff --git a/client/src/locales/en.json b/client/src/locales/en.json
index f6d405d86..c20fdc82f 100644
--- a/client/src/locales/en.json
+++ b/client/src/locales/en.json
@@ -1463,7 +1463,9 @@
 					"avg": "avg {{value}}",
 					"max": "max {{value}}",
 					"downTooltip": "Down",
-					"heatmapAria": "Response time heatmap"
+					"heatmapAria": "Response time heatmap",
+					"dayUptime": "Uptime: {{uptime}} ({{upChecks}}/{{totalChecks}} checks)",
+					"dayAvgResponse": "Avg response: {{value}}"
 				},
 				"infrastructure": {
 					"title": "Infrastructure",