LUFS Meter
Measure a clip’s loudness to the EBU R128 standard: integrated LUFS, loudness range and true peak, plus how streaming services would adjust it.
About this tool
This meter follows ITU-R BS.1770 and EBU R128, the standard behind the loudness figures used by streaming services and broadcasters. It applies the standard K-weighting filter (which matches how we hear, giving more weight to the upper midrange and ignoring deep rumble), measures in overlapping 400-millisecond blocks, and leaves out silence and very quiet passages with the standard's two gates, so pauses don't drag the figure down. It passes the EBU's own reference tests to within 0.1 LU.
Alongside integrated loudness you get the loudest 3-second and 0.4-second moments, the loudness range (how much the level varies, in LU) and an estimated true peak. Keep true peak below −1 dBTP if the file will be converted to MP3 or AAC, as encoding can push peaks higher. The table shows roughly how much each platform would turn your clip up or down to match its target; services that turn quiet tracks up only do so if there's headroom below the peak limit. Files are measured in your browser and never uploaded.