Audio Sample Rate Calculator

This calculator uses standard digital audio formulas to estimate frequency coverage, theoretical dynamic range, and uncompressed PCM storage requirements. The results are useful for choosing session settings, explaining sample-rate trade-offs, and estimating how much storage a recording will consume before compression.

Nyquist frequency

Nyquist frequency = sample rate ÷ 2

For example, a 48 kHz sample rate has a Nyquist frequency of 24 kHz. This means 24 kHz is the highest theoretical frequency that can be represented before anti-alias filtering is considered.

Minimum sample rate

Minimum sample rate = highest frequency × 2

To capture a 20 kHz signal, the theoretical minimum sample rate is 40 kHz. In real recording systems, common rates like 44.1 kHz and 48 kHz provide extra space for filter rolloff.

Theoretical dynamic range

Dynamic range ≈ 6.02 × bit depth + 1.76 dB

16-bit audio is roughly 98 dB on paper, while 24-bit audio is roughly 146 dB. Real-world microphones, preamps, rooms, and converters usually limit usable dynamic range before the math does.

Uncompressed audio file size

File size = sample rate × bit depth × channels × duration ÷ 8

A higher sample rate increases file size and disk bandwidth. Doubling from 48 kHz to 96 kHz roughly doubles the uncompressed audio data rate before compression or metadata are considered.

What is sample rate?

Sample rate is the number of times per second that a digital audio system measures an analog signal. It is usually written in hertz (Hz) or kilohertz (kHz). A rate of 48 kHz means the system takes 48,000 samples every second for each channel. Those samples are the time-based snapshots that make it possible to store, edit, process, and play audio in a digital workstation, recorder, phone, camera, or game engine.

Higher sample rates create more measurement points per second. That can extend the theoretical frequency range and give filters more room to work, but it also increases the amount of data your computer, recorder, interface, and storage need to handle. Sample rate is therefore a project decision, not just a quality slider. The best setting depends on what you are recording, where the audio will be delivered, how much processing you expect, and whether you need to stay aligned with video or broadcast standards.

What is Nyquist frequency?

Nyquist frequency is half the sample rate. It is the highest theoretical frequency that can be represented by a sampled signal before aliasing becomes a problem. If a session runs at 44.1 kHz, the Nyquist frequency is 22.05 kHz. If a session runs at 48 kHz, the Nyquist frequency is 24 kHz. If a session runs at 96 kHz, the Nyquist frequency is 48 kHz.

This does not mean every system perfectly captures sound right up to Nyquist. Real converters use anti-aliasing filters so frequencies above the useful band do not fold back into the audible range as aliasing. That filter behavior is one reason 44.1 kHz and 48 kHz leave a little space above the upper edge of typical human hearing. The calculator’s Nyquist readout gives the theoretical ceiling; the real-world result still depends on converter design and filtering.

Sample rate vs bit depth

Sample rate and bit depth solve different problems. Sample rate affects the frequency range that can be represented. Bit depth affects the number of amplitude steps available for each sample, which is usually discussed as dynamic range and noise floor. A higher sample rate does not automatically give you more headroom, and a higher bit depth does not extend the highest frequency that can be captured.

For example, 48 kHz / 16-bit audio has a 24 kHz Nyquist frequency and a theoretical dynamic range of about 98 dB. 48 kHz / 24-bit audio has the same 24 kHz Nyquist frequency but a much larger theoretical dynamic range of about 146 dB. In recording, 24-bit capture is often useful because it gives more room for conservative levels and later processing. For final delivery, 16-bit can still be perfectly appropriate when properly dithered and mastered.

44.1 kHz vs 48 kHz

44.1 kHz is historically tied to CD audio and remains common for music delivery. It has a Nyquist frequency of 22.05 kHz, which covers the generally accepted upper range of human hearing with a small amount of extra room. If your final release is CD-style music delivery or a streaming master that will be encoded from a music-focused workflow, 44.1 kHz can still be a sensible target.

48 kHz is the normal choice for video, film, broadcast, games, and many modern production pipelines. It has a Nyquist frequency of 24 kHz and aligns better with common camera, video editing, broadcast, and game audio expectations. If your audio will be synced to picture, embedded in a video timeline, delivered to a broadcaster, or placed in a game engine, 48 kHz is usually the safer default. The audible difference between 44.1 and 48 kHz is rarely the deciding factor; workflow compatibility usually matters more.

48 kHz vs 96 kHz

96 kHz doubles the sample rate of 48 kHz and raises the Nyquist frequency from 24 kHz to 48 kHz. That extra ultrasonic bandwidth can help in specific workflows, especially sound design, pitch shifting, extreme time stretching, scientific capture, or plug-in chains that behave better at higher internal rates. Some engineers also prefer 96 kHz because anti-aliasing filters can be placed farther away from the audible band.

The cost is straightforward: 96 kHz uses about twice the uncompressed audio data of 48 kHz at the same bit depth, channel count, and duration. It also increases CPU load for many plug-ins and can reduce track counts on limited systems. For ordinary dialogue, podcasts, video editing, music delivery, and most location recording, 48 kHz is usually more practical. Use 96 kHz when the project benefits from the extra processing margin, not because the number is larger.

Should I record at 192 kHz?

192 kHz gives a 96 kHz Nyquist frequency, which is far beyond normal human hearing. It can be useful for specialist sound design, ultrasonic capture, measurement work, and DSP research where material may be slowed down dramatically or analyzed outside the audible band. It can also be useful when a specific production brief requires it.

For normal recording, mixing, video, podcasting, and music delivery, 192 kHz is usually unnecessary. It creates large files, increases disk bandwidth, pushes CPU load higher, and may expose limits in interfaces or plug-ins. A well-recorded 48 kHz or 96 kHz session will usually beat a poorly managed 192 kHz session. Choose 192 kHz only when the extra ultrasonic range has a clear job.

How sample rate affects file size

For uncompressed PCM audio, file size scales directly with sample rate. The formula is sample rate × bit depth × channels × duration ÷ 8. A mono file uses one channel. A stereo file uses two channels. A surround or multichannel recording multiplies the size by the number of channels. WAV and AIFF headers add a tiny amount of metadata, but the audio payload is dominated by this formula.

As a practical example, 48 kHz / 24-bit stereo audio uses 2,304,000 bits per second, or 288,000 bytes per second. Five minutes of that audio is about 86.4 MB in decimal units. If you move the same project to 96 kHz while keeping 24-bit stereo and the same duration, the file size is roughly 172.8 MB. If you also increase channel count, the storage requirement rises again. This is why sample-rate decisions matter for long recordings, multitrack sessions, portable recorders, and shared project drives.

• Enter your current project’s sample rate and bit depth, then the target settings you’re considering.
• Compare Nyquist frequency (bandwidth) for each rate to see if the jump is meaningful for your sources.
• Check theoretical dynamic range to understand how bit depth choices affect headroom and noise floor.
• Use the Nyquist minimum mode when you know the highest frequency you need to capture.
• Use the file size mode to estimate storage impact for uncompressed PCM/WAV/AIFF recordings.
• Decide faster—no files are converted or uploaded; this is pure math in your browser.

This calculator is designed for engineers who need to decide between 44.1, 48, 88.2, 96, or even 192 kHz without opening a spreadsheet. Enter a current project rate and a proposed target rate along with bit depths, and you’ll see the Nyquist frequency and the theoretical dynamic range for each. That helps you answer whether the extra bandwidth or headroom is worth the CPU, storage, and interface strain.

The tool stays entirely client-side—no uploads, no analysis of your sessions. It simply performs the underlying math that’s easy to forget in the middle of a session. Use the percent change line to understand how much more bandwidth you’re taking on when you switch. The dynamic range readouts are also handy for explaining why 16-bit delivery is often fine but 24-bit capture provides more safety for processing and summing.

Practical guidance is included below each column to describe what a given rate is typically used for. For example, 48 kHz is common for video and game audio, while 96 kHz can provide gentler anti-aliasing for heavy processing chains. Ultra-high rates like 192 kHz can be useful for DSP research or extreme sound design but are rarely required for consumer delivery.

Because this calculator does not convert files, you can safely audition ideas on the fly. Use it before setting up a session template, before committing to a portable recorder format, or when explaining trade-offs to clients who ask “Why not 192k?” You’ll keep your workflows lean while making informed decisions grounded in a quick glance at Nyquist and SNR.