Free Audio Length Calculator
Paste your script; see how long it will run as audio. Adjust pacing for narration, conversational, or news-read style. Useful for planning podcast episodes, voice ads, audiobooks, or any audio production where length matters.
Estimate based on spoken-word pacing. Add 10–15% buffer for natural breath and pauses.
What this tool is
Audio length is determined by speaking pace and word count. Average podcast pacing is roughly 150 words per minute (wpm) for conversational delivery; faster (170+ wpm) for news-read; slower (130 wpm) for narration. This calculator does the math so you can size scripts to target run-times before recording.
How it works
- Step 1Paste your script
Word count is computed automatically. Works for any length from a 30-second ad to a 90-minute audiobook chapter.
- Step 2Pick the pacing
Conversational (150 wpm), narration (130 wpm), news-read (170 wpm), or a custom rate. Choose what matches your delivery style.
- Step 3See the audio length
Computed in real time as you type. Use to plan run-times for podcast episodes, voice ads, or any audio asset where length is constrained.
Frequently asked questions
How accurate is the estimate?
Within ~5-10% for most scripts. Real audio length varies with pauses, breath, ambient music, and intros/outros — the calculator covers spoken word only.
Why pick a different pace for narration vs conversational?
Conversational delivery (~150 wpm) feels natural for two-host podcasts. Narration (~130 wpm) is slower and more deliberate, suited to audiobook and meditation. News-read (~170 wpm) is brisker and information-dense.
Does this work for non-English scripts?
Word count works for any space-separated language. Pacing varies by language though — Spanish and Italian tend to be faster (more syllables per word, shorter words), while German and French run a bit slower. Adjust the custom rate.
Should I add buffer for pauses and breaths?
Add 10-15% on top for natural delivery. Add 5-10% more for music intros, sponsor reads, or transitional silences. The calculator gives spoken-word baseline; total run-time depends on your production.
Want to use AutoContent API programmatically?
The full AutoContent API generates podcasts, videos, infographics, and slide decks from any document or URL. Per-request pricing — pay only for what you generate.