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Loudness Target Calculator

Enter the integrated loudness of a file, pick a target standard and read the gain to apply, the resulting loudness and true peak, and a warning if the gain would push the true peak over the limit. No meter at hand? Load the audio file: it is measured in your browser and never uploaded.

What it does

Enter the loudness of your file, pick a standard and read the gain to apply. The true peak is checked for you.

  • Gain to your target. Target minus measured loudness, in dB, with the resulting loudness and true peak.
  • Standards with sources. EBU R 128, ATSC A/85, Spotify, Apple Podcasts and more. Each value is marked official or recommended, with its source.
  • True-peak check. A warning when the gain would push the true peak over the limit, and the most gain you can add without a limiter.
  • Wheel scale. Input, target and result on one scale. Unlock it and drag or scroll to try your own target.
  • Platform playback. What a streaming platform would do to your file as it is: raise it, lower it or leave it.
  • Measure from a file. Loudness and true peak (ITU-R BS.1770) measured in your browser. The file is never uploaded.

Where it helps

For anyone delivering audio to a loudness spec: radio and TV programmes, podcasts, streaming masters, or house and client targets you set yourself. Not a certified meter: for contractual deliveries, use a certified one.

Screenshots

Gain to apply, input, target and result on the loudness scale
Gain to apply, input, target and result on the loudness scale
True-peak warning: the gain would push the peak over the limit
True-peak warning: the gain would push the peak over the limit

Quick start

  1. Enter the loudness of your file, or choose an audio file to measure it.
  2. Pick the target standard.
  3. Read the gain to apply, and check the true-peak warning.

Changelog

  • 2026.9.6 · 2026-09-29 · Loudness fields need no sign button: 18.4 counts as −18.4. The true-peak fields keep a ± button.
  • 2026.9.5 · 2026-09-29 · Installable and works offline, always opens in English, movable target on the scale (locked on presets), accuracy audit and mobile polish.
  • 2026.9.2 · 2026-09-29 · Loudness measurement validated against the official EBU test set.
  • 2026.9.1 · 2026-09-29 · First public release: gain to target with a true-peak check, and measurement from an audio file.