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Audio duration calculator and length estimator
Check the length of an existing audio file without uploading it, or estimate how long a script will be when spoken. Two ways to plan voiceovers, podcasts, and recordings.
Estimate audio duration from textRead duration from a local audio fileUseful for scripts and voiceoversWorks instantly in the browser
Free browser tool
Audio Length Estimator
Check an audio file’s duration
Read the length of an existing recording locally. Your file is not uploaded. MP3, WAV, M4A, and other formats supported by your browser.
Or estimate spoken duration from a script
Paste text below and choose a speaking pace. This is an estimate; the file checker above reads the recorded duration.
0Words
0Characters
0Sentences
0:00Estimated audio
Next step
Transcribe the edited audio when you need text
Start free, upload the prepared recording, and get an AI transcript with searchable text, speaker labels, timestamps, summaries, and TXT, DOCX, PDF, SRT, or VTT exports.
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Try it freeCheck the duration of an existing audio file
Choose an MP3, WAV, M4A, or another audio format your browser supports. The file stays on your device while the tool reads its duration in minutes, seconds, and milliseconds. For example, a 90-second recording displays 01:30.000. If the browser cannot read the format or duration metadata, try an MP3 or WAV copy.
Estimate audio duration from a script
Paste a script and estimate the spoken audio duration before recording. This audio duration calculator helps with voiceovers, courses, podcasts, demos, and sales scripts.
Plan recording time before production
Knowing expected duration helps you fit a script into a target slot, schedule recording sessions, and decide whether to cut or expand a section.
Pair planning with recording and transcription
After estimating length, record the audio in the browser or upload the final file to InstantTranscriber when you need transcript text and exports.
How it works
How to use the Audio Length Estimator
- Choose an audio file to read its duration, or paste a script below to estimate speaking time.
- For scripts, adjust the words-per-minute slider to match your delivery.
- Edit the script until it fits your target length.
- Record or transcribe the final audio when ready.
FAQ
Audio Length Estimator questions
How can I estimate audio duration from a script?
Paste the script into the Audio Length Estimator. It calculates a spoken-duration estimate from the amount of text.
Is this an audio duration calculator?
Yes. Choose a local audio file to read its recorded duration, or paste text to estimate how long it may take to speak. Audio files are not uploaded.
Is the audio length estimate exact?
The file checker reads duration from your audio file’s media metadata. The script estimate is approximate: speaking pace, pauses, language, and delivery affect the final recording.
Can I use this for podcast scripts?
Yes. It is useful for podcast scripts, voiceovers, lectures, training modules, and sales scripts.
What should I do after estimating audio length?
Record the script, edit the audio if needed, and transcribe the finished recording when you need searchable text or exports.