Local processing · no file upload needed
Compressed formats use bitrate x duration / 8. WAV and AIFF use sample rate x bit depth x channels. FLAC and ALAC are estimates because compression depends on the audio.
Use the same storage, duration, and headroom settings to compare voice, podcast, music, lossless, and uncompressed audio.
| Use case | Bitrate | Storage per hour | Time on your storage |
|---|
Long recordings can create extra files, failed takes, artwork, lyrics, edits, and exports. For important sessions, keep more free storage than the bare estimate.
Use the calculator to answer either how long your available storage can record or how much storage a planned session needs. No audio file is required.
Fill in the available space or target recording length, then leave practical headroom for failed takes, artwork, metadata, edits, and exported copies.
Compare voice-friendly MP3, podcast AAC, Opus, FLAC/ALAC estimates, or uncompressed WAV/AIFF settings so the result reflects the kind of audio you plan to record.
Read the estimated time or storage requirement before recording, then choose a safer format, lower bitrate, or larger drive if the session is close to the limit.
Travelers, field recordists, and students need to know how many hours of MP3 or WAV audio fit on a USB drive, SD card, or laptop before leaving home. This recording time calculator gives a practical estimate for interviews, lectures, music captures, voice notes, and offline radio sessions.
Result preview: The USB drive or SD card can be packed with a realistic hour count for lectures, interviews, field notes, or music captures before leaving home.
A full day of lectures, seminars, workshops, or classroom recordings needs a clear storage plan before class starts. Enter the storage size and bitrate to estimate recording hours for MP3 lectures, WAV backups, AAC voice files, and long study sessions.
Result preview: A student or teacher can confirm that a full day of class audio will fit, then pick a speech-friendly setting that leaves room for extra takes.
Creators comparing recording settings need to see why voice files can last much longer than music recordings on the same device. Compare low-bitrate speech, podcast MP3, high-quality music MP3, AAC, and WAV so you can choose settings for interviews, language practice, audiobooks, or streaming music capture.
Result preview: The result shows why a voice setting lasts longer than a music setting, helping the user choose the right tradeoff before recording.
Real recording sessions create retries, failed takes, artwork, edited copies, split files, and converted MP3 exports. Use the estimate to reserve safe headroom before recording webinars, podcasts, meetings, online classes, or radio shows.
Result preview: The recording plan leaves extra space for retries, trimmed copies, artwork, converted MP3 files, and final exports instead of filling the device too tightly.
Checked against mature online audio tools for the same job: the goal is not only to complete the task, but to make the next decision obvious.
The strongest calculators do more than output one number: they compare presets, explain tradeoffs, and produce settings a user can copy into an editor or recorder.
Single-purpose calculators often leave the user with a number but no next action.
This page now pairs the calculation with practical result previews, copy-ready workflow notes, and routes to the next Cinch tool instead of stopping at math.
Use it before recording, exporting, mixing, or editing when you need a practical estimate or setting to copy into another workflow.
No. This calculator works from values you type into the page, such as duration, bitrate, storage size, offset, level, timing, or format settings.
They are planning estimates. Real files can vary because of encoder overhead, variable bitrate, metadata, artwork, lossless compression, or the way another editor applies settings.
Use the number as a starting point for storage planning, recording settings, time-stretch correction, or mix automation, then check the final audio in the tool or editor you actually use.
