diff --git a/package.json b/package.json
index f833b1f..42605f6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.81.15",
+  "version": "1.81.16",
   "description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
   "main": "index.js",
   "scripts": {
diff --git a/src/components/WeeklyView.tsx b/src/components/WeeklyView.tsx
index 41c9a4f..0a88379 100644
--- a/src/components/WeeklyView.tsx
+++ b/src/components/WeeklyView.tsx
@@ -196,7 +196,7 @@ export interface SomedayList {
 }
 
 // Time grid configuration options
-export type CellDuration = 15 | 20 | 30 | 60;
+export type CellDuration = 15 | 20 | 30 | 45 | 60;
 const DEFAULT_SOMEDAY_SLOT_COUNT = 5;
 
 const getSomedaySlotCount = (tasks: Task[]) => {
@@ -339,14 +339,12 @@ function getTimeSlots(
     endHour: number,
 ): string[] {
     const slots: string[] = [];
-    const slotsPerHour = 60 / cellDuration;
-    for (let hour = startHour; hour < endHour; hour++) {
-        for (let slot = 0; slot < slotsPerHour; slot++) {
-            const minutes = slot * cellDuration;
-            slots.push(
-                `${hour.toString().padStart(2, "0")}:${minutes.toString().padStart(2, "0")}`,
-            );
-        }
+    const startMins = startHour * 60;
+    const endMins = endHour * 60;
+    for (let mins = startMins; mins < endMins; mins += cellDuration) {
+        const h = Math.floor(mins / 60);
+        const m = mins % 60;
+        slots.push(`${h.toString().padStart(2, "0")}:${m.toString().padStart(2, "0")}`);
     }
     return slots;
 }
@@ -1460,6 +1458,7 @@ export default function WeeklyView() {
             case 15: return 25;
             case 20: return 30;
             case 30: return 35;
+            case 45: return 45;
             case 60: return 50;
             default: return 50;
         }
@@ -5451,7 +5450,7 @@ export default function WeeklyView() {
                                 {profile.language === "de" ? "Zeitfenster" : "Slot"}
                             </span>
                             <div style={{ display: "flex", gap: "4px" }}>
-                                {([15, 20, 30, 60] as CellDuration[]).map((d) => (
+                                {(([15, 20, 30, 45] as CellDuration[])).map((d) => (
                                     <button key={d} onClick={() => { setCellDuration(d); saveSetting("cellDuration", d); }}
                                         style={{ flex: 1, padding: "5px 0", fontSize: "0.8rem", borderRadius: "6px", border: "none", cursor: "pointer", fontWeight: effectiveCellDuration === d ? 700 : 400, background: effectiveCellDuration === d ? (darkMode ? "#374151" : "#333") : (darkMode ? "#1f2937" : "#e5e7eb"), color: effectiveCellDuration === d ? "#fff" : (darkMode ? "#9ca3af" : "#6b7280") }}>
                                         {d}m
@@ -5746,7 +5745,7 @@ export default function WeeklyView() {
                             title="Slot Duration"
                         >
                             <Clock size={16} className="text-gray-500 mr-1" />
-                            {([15, 20, 30, 60] as CellDuration[]).map((duration) => (
+                            {(([15, 20, 30, 45] as CellDuration[])).map((duration) => (
                                 <button
                                     key={duration}
                                     onClick={() => {
@@ -5994,7 +5993,7 @@ export default function WeeklyView() {
                                     {profile.showTimeGrid && (
                                         <div style={{ padding: "6px 12px", display: "flex", alignItems: "center", gap: "6px" }}>
                                             <span style={{ fontSize: "12px", color: "#888", marginRight: "4px" }}>{profile.language === "de" ? "Slot" : "Slot"}:</span>
-                                            {([15, 20, 30, 60] as CellDuration[]).map((duration) => (
+                                            {(([15, 20, 30, 45] as CellDuration[])).map((duration) => (
                                                 <button
                                                     key={duration}
                                                     onClick={() => { setCellDuration(duration); saveSetting("cellDuration", duration); }}