diff --git a/components/DurationField.vue b/components/DurationField.vue
new file mode 100644
index 0000000..8253690
--- /dev/null
+++ b/components/DurationField.vue
@@ -0,0 +1,110 @@
+<template>
+  <div class="text-sm">
+    <span v-if="label" class="mb-1 block text-zinc-400">{{ label }}</span>
+    <div class="relative">
+      <input
+        v-model="draft"
+        type="text"
+        inputmode="decimal"
+        class="w-full rounded-xl border border-white/10 bg-zinc-950 px-3 py-2 pr-8 cursor-ns-resize outline-none ring-amber-300/40 placeholder:text-zinc-600 focus:cursor-text focus:ring-2"
+        :class="{ 'select-none caret-transparent': scrubbing }"
+        placeholder="seconds"
+        autocomplete="off"
+        spellcheck="false"
+        @blur="commit"
+        @keydown.enter.prevent="commit"
+        @pointerdown="onPointerDown"
+      >
+      <span class="pointer-events-none absolute right-3 top-1/2 -translate-y-1/2 text-xs text-zinc-500">s</span>
+    </div>
+    <input
+      class="aigen-slider mt-3 w-full"
+      type="range"
+      :min="SLIDER_MIN"
+      :max="SLIDER_MAX"
+      :step="0.1"
+      :value="slider"
+      :style="{ background: `linear-gradient(to right, #fbbf24 ${sliderPct}%, #27272a ${sliderPct}%)` }"
+      :aria-label="label || 'Duration in seconds'"
+      @input="onSlider"
+    >
+    <p v-if="hint" class="mt-1 text-[11px] text-zinc-500">{{ hint }}</p>
+  </div>
+</template>
+
+<script setup lang="ts">
+const MIN = 0.5
+const MAX = 120
+const SLIDER_MIN = 1
+const SLIDER_MAX = 30
+
+withDefaults(defineProps<{
+  label?: string
+  hint?: string
+}>(), {
+  label: '',
+  hint: ''
+})
+
+const model = defineModel<number>({ required: true })
+const draft = ref(formatDuration(model.value))
+const scrubbing = ref(false)
+
+const slider = computed(() => Math.min(SLIDER_MAX, Math.max(SLIDER_MIN, model.value)))
+const sliderPct = computed(() => ((slider.value - SLIDER_MIN) / (SLIDER_MAX - SLIDER_MIN)) * 100)
+
+watch(model, (value) => {
+  if (!scrubbing.value) draft.value = formatDuration(value)
+})
+
+function clampDuration(value: number) {
+  if (!Number.isFinite(value)) return 5
+  return Math.min(MAX, Math.max(MIN, Math.round(value * 10) / 10))
+}
+
+function formatDuration(value: number) {
+  return Number.isInteger(value) ? String(value) : value.toFixed(1).replace(/\.0$/, '')
+}
+
+function commit() {
+  const parsed = Number.parseFloat(draft.value.replace(',', '.').trim())
+  model.value = clampDuration(parsed)
+  draft.value = formatDuration(model.value)
+}
+
+function onSlider(event: Event) {
+  model.value = clampDuration(Number((event.target as HTMLInputElement).value))
+  draft.value = formatDuration(model.value)
+}
+
+function onPointerDown(event: PointerEvent) {
+  if (event.button !== 0) return
+  const input = event.currentTarget as HTMLInputElement
+  const startY = event.clientY
+  const startValue = model.value
+  let moved = false
+  const onMove = (move: PointerEvent) => {
+    const delta = startY - move.clientY
+    if (!moved && Math.abs(delta) < 5) return
+    if (!moved) {
+      moved = true
+      scrubbing.value = true
+      input.setPointerCapture(move.pointerId)
+      input.blur()
+    }
+    move.preventDefault()
+    const next = clampDuration(startValue + delta / 18)
+    model.value = next
+    draft.value = formatDuration(next)
+  }
+  const onUp = () => {
+    input.removeEventListener('pointermove', onMove)
+    input.removeEventListener('pointerup', onUp)
+    input.removeEventListener('pointercancel', onUp)
+    scrubbing.value = false
+  }
+  input.addEventListener('pointermove', onMove)
+  input.addEventListener('pointerup', onUp)
+  input.addEventListener('pointercancel', onUp)
+}
+</script>
diff --git a/pages/index.vue b/pages/index.vue
index 7e99b8b..bd9a338 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -90,27 +90,7 @@
               class="w-full rounded-xl border border-white/10 bg-zinc-950 px-3 py-2 text-sm outline-none ring-amber-300/40 placeholder:text-zinc-600 focus:ring-2"
               placeholder="Motion prompt for this extension…"
             />
-            <div class="mt-3">
-              <p class="mb-2 text-xs uppercase tracking-wider text-zinc-500">Duration</p>
-              <div class="grid grid-cols-2 gap-2">
-                <button
-                  type="button"
-                  class="rounded-xl border px-3 py-2 text-sm"
-                  :class="item.duration === 3 ? 'border-amber-300 bg-amber-400/10' : 'border-white/10'"
-                  @click="item.duration = 3"
-                >
-                  3s
-                </button>
-                <button
-                  type="button"
-                  class="rounded-xl border px-3 py-2 text-sm"
-                  :class="item.duration === 5 ? 'border-amber-300 bg-amber-400/10' : 'border-white/10'"
-                  @click="item.duration = 5"
-                >
-                  5s
-                </button>
-              </div>
-            </div>
+            <DurationField v-model="item.duration" class="mt-3" label="Duration" />
           </div>
           <button
             type="button"
@@ -251,37 +231,11 @@
                 </select>
                 <p class="mt-1 text-[11px] text-zinc-500">{{ frameCount }} frames · duration × FPS</p>
               </label>
-              <div class="text-sm">
-                <span class="mb-1 block text-zinc-400">Duration</span>
-                <div class="relative">
-                  <input
-                    v-model="durationDraft"
-                    type="text"
-                    inputmode="decimal"
-                    class="w-full rounded-xl border border-white/10 bg-zinc-950 px-3 py-2 pr-8 cursor-ns-resize outline-none ring-amber-300/40 placeholder:text-zinc-600 focus:cursor-text focus:ring-2"
-                    :class="{ 'select-none caret-transparent': durationScrubbing }"
-                    placeholder="seconds"
-                    autocomplete="off"
-                    spellcheck="false"
-                    @blur="commitDuration"
-                    @keydown.enter.prevent="commitDuration"
-                    @pointerdown="onDurationPointerDown"
-                  >
-                  <span class="pointer-events-none absolute right-3 top-1/2 -translate-y-1/2 text-xs text-zinc-500">s</span>
-                </div>
-                <input
-                  class="aigen-slider mt-3 w-full"
-                  type="range"
-                  :min="DURATION_SLIDER_MIN"
-                  :max="DURATION_SLIDER_MAX"
-                  :step="0.1"
-                  :value="durationSlider"
-                  :style="{ background: `linear-gradient(to right, #fbbf24 ${durationSliderPct}%, #27272a ${durationSliderPct}%)` }"
-                  aria-label="Duration in seconds"
-                  @input="onDurationSlider"
-                >
-                <p class="mt-1 text-[11px] text-zinc-500">Type any length, use the slider, or drag up/down in the box.</p>
-              </div>
+              <DurationField
+                v-model="duration"
+                label="Duration"
+                hint="Type any length, use the slider, or drag up/down in the box."
+              />
             </div>
             <label class="text-sm">
               <span class="mb-1 block text-zinc-400">Seed</span>
@@ -452,27 +406,11 @@
                 placeholder="Continue the motion from this frame…"
               />
             </label>
-            <div>
-              <p class="mb-2 text-xs uppercase tracking-wider text-zinc-500">Extension duration</p>
-              <div class="grid grid-cols-2 gap-2">
-                <button
-                  type="button"
-                  class="rounded-xl border px-3 py-2 text-sm"
-                  :class="extendDuration === 3 ? 'border-amber-300 bg-amber-400/10' : 'border-white/10'"
-                  @click="extendDuration = 3"
-                >
-                  3s
-                </button>
-                <button
-                  type="button"
-                  class="rounded-xl border px-3 py-2 text-sm"
-                  :class="extendDuration === 5 ? 'border-amber-300 bg-amber-400/10' : 'border-white/10'"
-                  @click="extendDuration = 5"
-                >
-                  5s
-                </button>
-              </div>
-            </div>
+            <DurationField
+              v-model="extendDuration"
+              label="Extension duration"
+              hint="Type any length, use the slider, or drag up/down in the box."
+            />
             <button
               type="button"
               class="w-full rounded-2xl bg-amber-400 px-4 py-2.5 text-sm font-semibold text-zinc-950 transition hover:bg-amber-300 disabled:cursor-not-allowed disabled:opacity-50"
@@ -703,7 +641,7 @@ interface RetryDraft {
 interface QueuedExtension {
   id: string
   prompt: string
-  duration: 3 | 5
+  duration: number
 }
 
 const PRESETS: Record<Exclude<AspectId, 'auto'>, { width: number; height: number }> = {
@@ -743,17 +681,7 @@ const cfgTouched = ref(false)
 const fps = ref(24)
 const samplerName = ref('res_multistep')
 const scheduler = ref('simple')
-const DURATION_MIN = 0.5
-const DURATION_MAX = 120
-const DURATION_SLIDER_MIN = 1
-const DURATION_SLIDER_MAX = 30
 const duration = ref(5)
-const durationDraft = ref('5')
-const durationScrubbing = ref(false)
-const durationSlider = computed(() => Math.min(DURATION_SLIDER_MAX, Math.max(DURATION_SLIDER_MIN, duration.value)))
-const durationSliderPct = computed(() => {
-  return ((durationSlider.value - DURATION_SLIDER_MIN) / (DURATION_SLIDER_MAX - DURATION_SLIDER_MIN)) * 100
-})
 const seedInput = ref('random')
 const withSound = ref(true)
 const hideThumbnail = ref(false)
@@ -1007,32 +935,13 @@ watch(autoplayEnabled, (value) => {
   }
 })
 
-watch(duration, (value) => {
-  if (!durationScrubbing.value) durationDraft.value = formatDuration(value)
-})
-
 watch(turbo, (on) => {
   if (!cfgTouched.value) cfg.value = on ? CFG_TURBO : CFG_QUALITY
 })
 
 function clampDuration(value: number) {
   if (!Number.isFinite(value)) return 5
-  return Math.min(DURATION_MAX, Math.max(DURATION_MIN, Math.round(value * 10) / 10))
-}
-
-function formatDuration(value: number) {
-  return Number.isInteger(value) ? String(value) : value.toFixed(1).replace(/\.0$/, '')
-}
-
-function commitDuration() {
-  const parsed = Number.parseFloat(durationDraft.value.replace(',', '.').trim())
-  duration.value = clampDuration(parsed)
-  durationDraft.value = formatDuration(duration.value)
-}
-
-function onDurationSlider(event: Event) {
-  duration.value = clampDuration(Number((event.target as HTMLInputElement).value))
-  durationDraft.value = formatDuration(duration.value)
+  return Math.min(120, Math.max(0.5, Math.round(value * 10) / 10))
 }
 
 function clampCfg(value: number) {
@@ -1077,37 +986,6 @@ function restoreAdvanced(item: { turbo: boolean; aspect?: string; width?: number
   scheduler.value = restoreScheduler(item.scheduler)
 }
 
-function onDurationPointerDown(event: PointerEvent) {
-  if (event.button !== 0) return
-  const input = event.currentTarget as HTMLInputElement
-  const startY = event.clientY
-  const startValue = duration.value
-  let moved = false
-  const onMove = (move: PointerEvent) => {
-    const delta = startY - move.clientY
-    if (!moved && Math.abs(delta) < 5) return
-    if (!moved) {
-      moved = true
-      durationScrubbing.value = true
-      input.setPointerCapture(move.pointerId)
-      input.blur()
-    }
-    move.preventDefault()
-    const next = clampDuration(startValue + delta / 18)
-    duration.value = next
-    durationDraft.value = formatDuration(next)
-  }
-  const onUp = () => {
-    input.removeEventListener('pointermove', onMove)
-    input.removeEventListener('pointerup', onUp)
-    input.removeEventListener('pointercancel', onUp)
-    durationScrubbing.value = false
-  }
-  input.addEventListener('pointermove', onMove)
-  input.addEventListener('pointerup', onUp)
-  input.addEventListener('pointercancel', onUp)
-}
-
 function toast(message: string) {
   const id = crypto.randomUUID()
   toasts.value.push({ id, message })
@@ -1292,11 +1170,10 @@ async function loadDraft(draft: RetryDraft) {
   withSound.value = draft.sound !== false
   if (draft.hideInput && showPrivacyToggles.value) hideInputPreview.value = true
   duration.value = clampDuration(Number(draft.duration))
-  durationDraft.value = formatDuration(duration.value)
   extensionQueue.value = (draft.extensions || []).slice(0, MAX_EXTENSIONS).map(item => ({
     id: crypto.randomUUID(),
     prompt: String(item.prompt || ''),
-    duration: item.duration === 3 ? 3 : 5 as 3 | 5
+    duration: clampDuration(Number(item.duration))
   }))
   try {
     const blob = await $fetch<Blob>(`/api/library/drafts/${draft.id}/still`, { responseType: 'blob' })
@@ -1384,7 +1261,7 @@ async function openExtend(item?: LibraryClip) {
   currentClipId.value = id
   const clip = clips.value.find(entry => entry.id === id)
   extendPrompt.value = clip?.prompt || prompt.value
-  extendDuration.value = 5
+  extendDuration.value = clampDuration(duration.value)
   extendOpen.value = true
   lastFrameLoading.value = true
   lastFrameUrl.value = ''
@@ -1562,7 +1439,7 @@ function queueExtension() {
   extensionQueue.value.push({
     id: crypto.randomUUID(),
     prompt: prompt.value.trim(),
-    duration: 5
+    duration: duration.value
   })
 }
 
diff --git a/server/api/extend.post.ts b/server/api/extend.post.ts
index e5189b3..4acd08b 100644
--- a/server/api/extend.post.ts
+++ b/server/api/extend.post.ts
@@ -6,7 +6,8 @@ const SCHEDULERS = new Set(['simple', 'ddim_uniform', 'sgm_uniform'])
 
 function parseExtendDuration(raw: unknown) {
   const seconds = Number(raw)
-  return seconds === 3 || seconds === 5 ? seconds : 5
+  if (!Number.isFinite(seconds)) return 5
+  return Math.min(120, Math.max(0.5, Math.round(seconds * 10) / 10))
 }
 
 function frameLength(seconds: number, fps: number) {
diff --git a/server/api/generate.post.ts b/server/api/generate.post.ts
index 141729b..23c5f18 100644
--- a/server/api/generate.post.ts
+++ b/server/api/generate.post.ts
@@ -8,15 +8,14 @@ function isComfyBusyTimeout(error: unknown) {
   return text.includes('still busy after 3 minutes')
 }
 
-function parseDuration(raw: string) {
+function parseDuration(raw: unknown) {
   const seconds = Number(raw)
   if (!Number.isFinite(seconds)) return 5
-  return Math.min(120, Math.max(0.5, seconds))
+  return Math.min(120, Math.max(0.5, Math.round(seconds * 10) / 10))
 }
 
 function parseExtendDuration(raw: unknown) {
-  const seconds = Number(raw)
-  return seconds === 3 || seconds === 5 ? seconds : 5
+  return parseDuration(raw)
 }
 
 function parseExtensions(raw: string | undefined) {