Alcohol dilution reduction tables

Attention! You can observe contraction phenomenon when ethanol and water are mixing,
which means that volumes of ethanol and water are not additive
and mixing 1 liter of water with 1 liter of ethanol will give you less than 2 liters of diluted ethanol.

WEIGHT parts of ethanol and water to be mixed to get 30%-90% ethanol solutions.
Ethanol strenghts
to be reduced
(% v/v)
30% 40% 50% 60% 70% 80% 90%
EtOH water EtOH water EtOH water EtOH water EtOH water EtOH water EtOH water
96 1 2,82 1 1,82 1 1,21 1 0,80 1 0,50 1 0,28 1 0,09
90 1 2,48 1 1,57 1 1,02 1 0,64 1 0,37 1 0,17 - -
85 1 2,23 1 1,39 1 0,87 1 0,52 1 0,27 1 0,08 - -
80 1 1,99 1 1,21 1 0,73 1 0,41 1 0,18 - - - -
75 1 1,75 1 1,04 1 0,60 1 0,30 1 0,09 - - - -
70 1 1,54 1 0,87 1 0,47 1 0,20 - - - - - -
65 1 1,32 1 0,72 1 0,35 1 0,10 - - - - - -
60 1 1,12 1 0,56 1 0,23 - - - - - - - -
55 1 0,92 1 0,42 1 0,11 - - - - - - - -
50 1 0,72 1 0,27 - - - - - - - - - -
45 1 0,54 1 0,14 - - - - - - - - - -
40 1 0,35 - - - - - - - - - - - -
35 1 0,18 - - - - - - - - - - - -
Source: Polish Pharmacopoeia VI

VOLUME parts of ethanol and water to be mixed to get 30%-90% ethanol solutions.
Ethanol strenghts
to be reduced
(% v/v)
30% 40% 50% 60% 70% 80% 90%
EtOH water EtOH water EtOH water EtOH water EtOH water EtOH water EtOH water
96 1 2,27 1 1,46 1 0,97 1 0,64 1 0,40 1 0,22 1 0,07
90 1 2,06 1 1,30 1 0,85 1 0,54 1 0,31 1 0,14 - -
85 1 1,89 1 1,18 1 0,74 1 0,44 1 0,23 1 0,07 - -
80 1 1,71 1 1,04 1 0,63 1 0,35 1 0,15 - - - -
75 1 1,54 1 0,91 1 0,53 1 0,26 1 0,08 - - - -
70 1 1,37 1 0,78 1 0,42 1 0,18 - - - - - -
65 1 1,19 1 0,64 1 0,31 1 0,09 - - - - - -
60 1 1,02 1 0,52 1 0,21 - - - - - - - -
55 1 0,85 1 0,38 1 0,10 - - - - - - - -
50 1 0,68 1 0,26 - - - - - - - - - -
45 1 0,51 1 0,13 - - - - - - - - - -
40 1 0,34 - - - - - - - - - - - -
35 1 0,17 - - - - - - - - - - - -


Table of ethanol solutions densities in temp. 20oC
(choice of values)
Density
(g/cm3)
wt%
(% m/m)
vol%
(% V/V)
g/dm3
0,998200,000,000,00
0,991063,985,0039,44
0,989345,036,3049,76
0,984718,0110,0078,88
0,981899,9712,4097,89
0,9789712,0915,00118,36
0,9767913,7417,00134,21
0,9751714,9718,50145,98
0,9735616,2120,00157,81
0,9686619,9624,50193,34
0,9681020,3825,00197,30
0,9622124,6130,00236,80
0,9615925,0330,50240,69
0,9555928,9135,00276,26
0,9537230,0436,50286,50
0,9480533,3040,00315,70
0,9449335,0041,90330,73
0,9395437,8045,00355,15
0,9351440,0047,40374,06
0,9301442,4350,00394,66
0,9247344,9852,70415,94
0,9199647,1855,00434,04
0,9137550,0157,90456,97
0,9091152,0960,00473,56
0,9025455,0062,90496,40
0,8976557,1565,00513,01
0,8912059,9567,70534,27
0,8855662,3970,00552,50
0,8795264,9772,40571,42
0,8727967,8275,00591,93
0,8677569,9476,90606,90
0,8592773,4880,00631,39
0,8556274,9981,30641,63
0,8448579,4085,00670,81
0,8433580,0185,50674,76
0,8308285,0289,50706,36
0,8291885,6690,00710,28
0,8177690,0593,30736,39
0,8113892,4195,00749,80
0,8074293,8496,00757,68
0,8041295,0196,80763,99
0,78924100,00100,00789,24
Source: Polish Pharmacopoeia VII vol. I