dB dBu dV PPM and VU Comparison Table - Level and level display scale

dB dBu dBV Comparison Table
Level and level display (scale)
for PPM meters and VU meters

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Multiplier - voltage ratio relative to specified reference	Scale dB	dB_u	dB_V	PPM ARD / IRT	PPM EBU- Scale	PPM UK- Scale	VU UK- Scale
10	20	7.746 V	10.0 V
4	12	3.084 V	3.981 V		12	7
	11	2.748 V	3.548 V	+5
	10	2.449 V	3.162 V	+4
	9	2.183 V	2.818 V	+3
	8	1.946 V	2.512 V	+2	8	6	4
	7	1.734 V	2.239 V	+1
2	6	1.546 V	1.995 V	0			2
	5	1.377 V	1.778 V	−1
	4	1.228 V	1.584 V	−2	4	5	0
1.414	3	1.094 V	1.412 V	−3
	2	975 mV	1.259 V	−4
	1	869 mV	1.122 V	−5
Ref. = 1	0	775 mV	1.000 V	−6	0	4	−4
	−1	690 mV	891 mV	−7
	−2	615 mV	794 mV	−8
0.7071	−3	548 mV	708 mV	−9			−7
	−4	489 mV	631 mV	−10	−4	3	−8
	−5	436 mV	562 mV
0.5	−6	388 mV	501 mV	−12			−10
	−8	308 mV	398 mV	−14	−8	2
0.25	−12	195 mV	251 mV	−18	−12	1
	−18	97.5 mV	126 mV	−24
	−24	48.9 mV	63.1 mV
	−30	25.4 mV	31.6 mV
0.01	−40	7.75 mV	10.0 mV
	−50	2.45 mV	3.16 mV
0.001	−60	775 µV	1.00 mV
	−70	245 µV	316 µV

Notice:

dBu = 20×log (V/0.775) where voltage is irrespective of impedance

dBm = 20×log (V/0.775) where voltage is measured across 600 ohms

dBV = 20×log (V/1)

Voltage data are always RMS values, unless otherwise noted.