diff --git a/frontend/app/(app)/dashboard/page.test.tsx b/frontend/app/(app)/dashboard/page.test.tsx
index adbed04..97c8445 100644
--- a/frontend/app/(app)/dashboard/page.test.tsx
+++ b/frontend/app/(app)/dashboard/page.test.tsx
@@ -273,6 +273,20 @@ describe("DashboardPage", () => {
     );
   });
 
+  it("lets the user type a timeout when creating an HTTP check", async () => {
+    renderDashboard("SIGNAL");
+
+    fireEvent.click(
+      (await screen.findAllByRole("button", { name: /new check/i }))[0],
+    );
+    fireEvent.click(await screen.findByRole("button", { name: /^http$/i }));
+
+    const timeout = await screen.findByLabelText("Timeout");
+    expect(timeout).toHaveValue(5);
+    fireEvent.change(timeout, { target: { value: "8" } });
+    expect(timeout).toHaveValue(8);
+  });
+
   it("uses the SIGNAL creator floor when a SOLO collaborator creates a check", async () => {
     context.activeOrg.plan = "SIGNAL";
     renderDashboard("SOLO");
diff --git a/frontend/app/(app)/dashboard/page.tsx b/frontend/app/(app)/dashboard/page.tsx
index 6495553..2c06295 100644
--- a/frontend/app/(app)/dashboard/page.tsx
+++ b/frontend/app/(app)/dashboard/page.tsx
@@ -34,6 +34,7 @@ import {
 } from "@/components/ui/select";
 import { CircleGauge, Plus, Pause, Play } from "lucide-react";
 import { Slider } from "@/components/ui/slider";
+import { DurationSliderField } from "@/components/app/duration-slider-field";
 import { formatDuration } from "@/lib/format";
 import { usePollWhenVisible } from "@/lib/use-poll-when-visible";
 import { CHECK_POLL_INTERVAL_MS } from "@/lib/polling";
@@ -460,15 +461,15 @@ function CreateCheckDialog({
                     value={[parseInt(intervalSeconds || String(floor), 10)]}
                     onValueChange={(v) => setIntervalSeconds(String(Array.isArray(v) ? v[0] : v))} />
                 </div>
-                <div className="space-y-2">
-                  <div className="flex items-center justify-between">
-                    <Label htmlFor="check-timeout">Timeout</Label>
-                    <span className="text-sm text-muted-foreground font-mono">{Math.round(parseInt(timeoutMs || "0", 10) / 1000)} s</span>
-                  </div>
-                  <Slider id="check-timeout" min={1000} max={60000} step={500}
-                    value={[parseInt(timeoutMs || "1000", 10)]}
-                    onValueChange={(v) => setTimeoutMs(String(Array.isArray(v) ? v[0] : v))} />
-                </div>
+                <DurationSliderField
+                  id="check-timeout"
+                  label="Timeout"
+                  valueMs={parseInt(timeoutMs || "1000", 10)}
+                  onValueMsChange={(ms) => setTimeoutMs(String(ms))}
+                  minMs={1000}
+                  maxMs={60000}
+                  stepMs={500}
+                />
                 {checkType === "HTTP" && (
                   <div className="space-y-2">
                     <Label htmlFor="check-expected-status">
diff --git a/frontend/components/app/duration-slider-field.test.tsx b/frontend/components/app/duration-slider-field.test.tsx
new file mode 100644
index 0000000..86ab0ef
--- /dev/null
+++ b/frontend/components/app/duration-slider-field.test.tsx
@@ -0,0 +1,60 @@
+import { useState } from "react";
+import { fireEvent, render, screen } from "@testing-library/react";
+import { describe, expect, it } from "vitest";
+import { DurationSliderField } from "./duration-slider-field";
+
+function Harness({ initialMs = 5000 }: { initialMs?: number }) {
+  const [ms, setMs] = useState(initialMs);
+  return (
+    <>
+      <DurationSliderField
+        id="timeout"
+        label="Timeout"
+        valueMs={ms}
+        onValueMsChange={setMs}
+        minMs={1000}
+        maxMs={60000}
+        stepMs={500}
+      />
+      <output>{ms}</output>
+    </>
+  );
+}
+
+describe("DurationSliderField", () => {
+  it("lets the user type seconds or drag the slider for the same millisecond value", () => {
+    render(<Harness />);
+
+    const input = screen.getByLabelText("Timeout");
+    const slider = screen.getByRole("slider", { hidden: true });
+
+    expect(input).toHaveValue(5);
+    expect(slider).toHaveValue("5000");
+
+    fireEvent.change(input, { target: { value: "12" } });
+    expect(input).toHaveValue(12);
+    expect(slider).toHaveValue("12000");
+    expect(screen.getByRole("status")).toHaveTextContent("12000");
+
+    fireEvent.change(slider, { target: { value: "3500" } });
+    expect(input).toHaveValue(3.5);
+    expect(slider).toHaveValue("3500");
+    expect(screen.getByRole("status")).toHaveTextContent("3500");
+  });
+
+  it("clamps a typed value to the slider range on blur", () => {
+    render(<Harness />);
+
+    const input = screen.getByLabelText("Timeout");
+
+    fireEvent.change(input, { target: { value: "90" } });
+    fireEvent.blur(input);
+    expect(input).toHaveValue(60);
+    expect(screen.getByRole("status")).toHaveTextContent("60000");
+
+    fireEvent.change(input, { target: { value: "0" } });
+    fireEvent.blur(input);
+    expect(input).toHaveValue(1);
+    expect(screen.getByRole("status")).toHaveTextContent("1000");
+  });
+});
diff --git a/frontend/components/app/duration-slider-field.tsx b/frontend/components/app/duration-slider-field.tsx
new file mode 100644
index 0000000..57ff416
--- /dev/null
+++ b/frontend/components/app/duration-slider-field.tsx
@@ -0,0 +1,69 @@
+"use client";
+
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Slider } from "@/components/ui/slider";
+
+function clampMs(ms: number, minMs: number, maxMs: number, stepMs: number) {
+  const snapped = Math.round(ms / stepMs) * stepMs;
+  return Math.min(maxMs, Math.max(minMs, snapped));
+}
+
+export function DurationSliderField({
+  id,
+  label,
+  valueMs,
+  onValueMsChange,
+  minMs,
+  maxMs,
+  stepMs,
+}: {
+  id: string;
+  label: string;
+  valueMs: number;
+  onValueMsChange: (ms: number) => void;
+  minMs: number;
+  maxMs: number;
+  stepMs: number;
+}) {
+  function commitSeconds(raw: string) {
+    const seconds = parseFloat(raw);
+    if (!Number.isFinite(seconds)) {
+      onValueMsChange(clampMs(valueMs, minMs, maxMs, stepMs));
+      return;
+    }
+    onValueMsChange(clampMs(Math.round(seconds * 1000), minMs, maxMs, stepMs));
+  }
+
+  return (
+    <div className="space-y-2">
+      <div className="flex items-center justify-between gap-3">
+        <Label htmlFor={id}>{label}</Label>
+        <div className="flex items-center gap-1.5">
+          <Input
+            id={id}
+            type="number"
+            min={minMs / 1000}
+            max={maxMs / 1000}
+            step={stepMs / 1000}
+            className="h-8 w-16 text-right font-mono text-sm"
+            value={valueMs / 1000}
+            onChange={(event) => commitSeconds(event.target.value)}
+            onBlur={(event) => commitSeconds(event.target.value)}
+          />
+          <span className="text-sm text-muted-foreground font-mono">s</span>
+        </div>
+      </div>
+      <Slider
+        min={minMs}
+        max={maxMs}
+        step={stepMs}
+        value={[valueMs]}
+        onValueChange={(value) => {
+          const next = Array.isArray(value) ? value[0] : value;
+          onValueMsChange(clampMs(next, minMs, maxMs, stepMs));
+        }}
+      />
+    </div>
+  );
+}
diff --git a/frontend/components/app/edit-check-dialog.tsx b/frontend/components/app/edit-check-dialog.tsx
index 4c504af..1a96b5f 100644
--- a/frontend/components/app/edit-check-dialog.tsx
+++ b/frontend/components/app/edit-check-dialog.tsx
@@ -7,6 +7,7 @@ import { useOrg } from "@/lib/org-context";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
+import { DurationSliderField } from "@/components/app/duration-slider-field";
 import {
   Dialog,
   DialogContent,
@@ -431,17 +432,15 @@ export function EditCheckDialog({ open, onOpenChange, check, onSaved }: EditChec
                     required
                   />
                 </div>
-                <div className="space-y-2">
-                  <Label htmlFor="edit-check-timeout">Timeout (ms)</Label>
-                  <Input
-                    id="edit-check-timeout"
-                    type="number"
-                    min={1}
-                    value={timeoutMs}
-                    onChange={(e) => setTimeoutMs(e.target.value)}
-                    required
-                  />
-                </div>
+                <DurationSliderField
+                  id="edit-check-timeout"
+                  label="Timeout"
+                  valueMs={parseInt(timeoutMs, 10) || 5000}
+                  onValueMsChange={(ms) => setTimeoutMs(String(ms))}
+                  minMs={1000}
+                  maxMs={60000}
+                  stepMs={500}
+                />
                 {type === "HTTP" && (
                   <>
                     <div className="space-y-2">
diff --git a/frontend/test/edit-check-dialog.test.tsx b/frontend/test/edit-check-dialog.test.tsx
index 1e132c3..849f7cd 100644
--- a/frontend/test/edit-check-dialog.test.tsx
+++ b/frontend/test/edit-check-dialog.test.tsx
@@ -203,6 +203,32 @@ describe("EditCheckDialog", () => {
     expect(screen.queryByLabelText(/period/i)).not.toBeInTheDocument();
   });
 
+  it("lets the user type timeout in seconds or set it with a slider", () => {
+    renderDialog(HTTP);
+
+    const input = screen.getByLabelText("Timeout");
+    expect(input).toHaveValue(5);
+    expect(screen.getByRole("slider", { hidden: true })).toHaveValue("5000");
+
+    fireEvent.change(input, { target: { value: "10" } });
+    expect(input).toHaveValue(10);
+    expect(screen.getByRole("slider", { hidden: true })).toHaveValue("10000");
+  });
+
+  it("submits typed timeout seconds as milliseconds", async () => {
+    const { captured } = renderDialogCapturingVariables(HTTP);
+    await waitForPlan();
+
+    fireEvent.change(screen.getByLabelText("Timeout"), {
+      target: { value: "10" },
+    });
+    submitForm();
+
+    await waitFor(() => expect(captured).toHaveLength(1));
+    const input = captured[0].input as Record<string, unknown>;
+    expect(input.timeoutMs).toBe(10000);
+  });
+
   it("uses the paid plan floor for heartbeat periods and active intervals", async () => {
     const { unmount } = renderDialog(HEARTBEAT);
     await waitFor(() =>