How is buffer size latency calculated?

Latency (ms) = (Buffer Size in samples / Sample Rate in Hz) × 1000. For example: 256 samples at 48,000 Hz = 256 / 48000 × 1000 ≈ 5.33 ms one-way.

What is round-trip latency?

Round-trip latency is the total delay from audio entering your interface (input) to you hearing it back through monitors or headphones (output). It equals roughly twice the one-way buffer latency, plus any fixed driver or converter overhead.

What latency is good enough for recording?

Below 10 ms round-trip is comfortable for most musicians using software monitoring. Below 5 ms is nearly imperceptible. Above 20 ms starts to feel like an echo and should be reduced by lowering the buffer size or using direct hardware monitoring.

Does a higher sample rate lower latency?

Yes. Doubling the sample rate at the same buffer size halves the latency. A 256-sample buffer at 96 kHz gives about 2.67 ms — half the latency of 256 samples at 48 kHz (5.33 ms).

Why is my actual DAW latency higher than this tool shows?

This calculator shows theoretical buffer latency only. Your actual round-trip latency also includes driver overhead (typically 1–3 ms per direction), analog-to-digital converter delay, and plugin processing delay (PDC). Your DAW's latency report accounts for all of these.

What buffer size should I use for mixing vs. tracking?

For tracking with software monitoring, use the lowest buffer your CPU sustains without dropouts — typically 64 to 256 samples. For mixing with no live input, 512 to 1024 samples is fine and reduces CPU spikes without any noticeable latency impact.

Buffer Size to Latency Calculator

Pick your buffer size and sample rate to instantly see input, output, and round-trip latency in milliseconds — plus a comparison table for every common buffer setting.

Audio Interface Settings

Buffer Size (samples)

Sample Rate (Hz)

Driver / Converter Overhead (per direction, optional)

Typical ASIO/CoreAudio overhead is 1–3 ms. Leave at 0 for theoretical values.

Input Latency

—

Round-Trip

—

ms total

Output Latency

—

Latency Scale —

0 ms 5 ms 10 ms 20 ms 40+ ms

Buffer Size Comparison

At current sample rate — click row to apply

Buffer (samples)	One-Way (ms)	Round-Trip (ms)	Typical Use

Applied!

Summary

This buffer size to latency calculator converts the number of audio buffer samples and your sample rate into precise millisecond latency values. It shows input latency, output latency, and total round-trip latency so you can set your DAW or audio interface buffer size with confidence. Use it to find the lowest buffer size your CPU can handle without glitches, or to confirm the latency you will experience during live software monitoring.

How it works

Select your sample rate (e.g. 44,100 Hz or 48,000 Hz) from the preset list or enter a custom value.
Select your buffer size in samples (e.g. 128, 256, 512) or enter a custom value.
The tool divides buffer samples by sample rate to get one-way latency in seconds, then multiplies by 1,000 to convert to milliseconds.
Round-trip latency is twice the one-way value — covering both the input and output paths through your audio interface.
An optional driver overhead field lets you add fixed ASIO/CoreAudio converter delay for a real-world estimate.
The comparison table lists all common buffer sizes at your chosen sample rate so you can pick the best trade-off.

Use cases

Determine whether a 128-sample buffer gives acceptable latency for live software instrument recording.
Find the right buffer size before a live performance session to prevent audible monitoring delay.
Compare latency at 44.1 kHz versus 96 kHz for the same buffer size to justify higher sample rates.
Communicate latency expectations to non-technical musicians or clients in plain millisecond values.
Verify DAW buffer settings after upgrading an audio interface.
Optimize a home studio setup for the lowest latency the CPU can sustain without audio dropouts.

Frequently Asked Questions

Last updated: 2026-05-29 · Reviewed by Nham Vu