## Dilute

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• Tony just a question on the dilution method you posted on the 5th Feb.Every time I use your method I seem to get an answer equel to one (1) too many. When
Message 1 of 4 , Feb 20, 2001
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Tony just a question on the dilution method you posted on the 5th
Feb.Every time I use your method I seem to get an answer equel to one
(1) too many. When working out your example you posted I always end
up with 2.75l instesd of 1.75l. When I went to the distiller/dilute
site and used the calculator it worked out just fine. Any idea what
I'm doing wrong?. I am taking the 1 off by the way.
T.I.A
Pilch.
• Pilch the maths was .. ... Yeah, simple mistake ..you re doing the -1 last. What I should have said, more precisely was .... multiply the amount of spirits
Message 2 of 4 , Feb 20, 2001
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Pilch

the maths was ..
>If you want to know how much water to add to dilute your alcohol down,
>just multiply the amount of spirits you have by (strong/weak) - 1
>
>eg: if you want to dilute 2L of 75% alcohol down to 40%, you will
>need to add 2 x ((75/40)-1) = 1.75L of water

Yeah, simple mistake ..you're doing the -1 last.
What I should have said, more precisely was ....

"multiply the amount of spirits you have by ( (strong/weak) -1)"

eg subtract the one from (strong/weak) before multiplying by quantity

ok ....strong/weak = 75/40 = 1.875
subtract 1 = 1.875 - 1 = 0.875
multiply by litres of spirit (2) = 2 x 0.875 = 1.75 L water to add

how this works is a rearangement of ......

in 2 litres of 75% alcohol, there is 1.5L of pure (100%) alcohol
eg 2 x 0.75 = 1.5
to use 1.5L of pure, diluted to 40%, you need a total of 1.5/0.40 = 3.75 L
you know you've got 2L of spirit, thus you need to add (3.75-2) = 1.75L of water

so ....(( 2 x 0.75 ) / 0.40 ) - 2
which is the same as 2 x ( (75/40) - 1)

Tony just a question on the dilution method you posted on the 5th
Feb.Every time I use your method I seem to get an answer equel to one
(1) too many. When working out your example you posted I always end
up with 2.75l instesd of 1.75l. When I went to the distiller/dilute
site and used the calculator it worked out just fine. Any idea what
I'm doing wrong?. I am taking the 1 off by the way.
T.I.A
Pilch.
• Has anybody used this method. Divide the strength of alcohol you have , by the strength of alcohol you require, Multiply by the volume Then minus the volume.
Message 3 of 4 , Feb 20, 2001
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Has anybody used this method.
Divide the strength of alcohol you have , by the strength of alcohol you
require,
Multiply by the volume
Then minus the volume.
ie 95% divided by 40% =2.375 x 3.3=7.8375 minus 3.3=4.5375litres
The figure 4.5375 litres is the amount of water you will have to add to 3.3
litres of alcohol @ 95% to reduce the concentration to 40%
Pete

-----Original Message-----
From: Tony & Elle Ackland [mailto:Tony.Ackland@...]
Sent: Wednesday, 21 February 2001 06:44
To: 'Distillers newsgroup'
Subject: RE: [Distillers] Dilute

Pilch

the maths was ..
>If you want to know how much water to add to dilute your alcohol down,
>just multiply the amount of spirits you have by (strong/weak) - 1
>
>eg: if you want to dilute 2L of 75% alcohol down to 40%, you will
>need to add 2 x ((75/40)-1) = 1.75L of water

Yeah, simple mistake ..you're doing the -1 last.
What I should have said, more precisely was ....

"multiply the amount of spirits you have by ( (strong/weak) -1)"

eg subtract the one from (strong/weak) before multiplying by quantity

ok ....strong/weak = 75/40 = 1.875
subtract 1 = 1.875 - 1 = 0.875
multiply by litres of spirit (2) = 2 x 0.875 = 1.75 L water to add

how this works is a rearangement of ......

in 2 litres of 75% alcohol, there is 1.5L of pure (100%) alcohol
eg 2 x 0.75 = 1.5
to use 1.5L of pure, diluted to 40%, you need a total of 1.5/0.40 = 3.75 L
you know you've got 2L of spirit, thus you need to add (3.75-2) = 1.75L of
water

so ....(( 2 x 0.75 ) / 0.40 ) - 2
which is the same as 2 x ( (75/40) - 1)

Tony just a question on the dilution method you posted on the 5th
Feb.Every time I use your method I seem to get an answer equel to one
(1) too many. When working out your example you posted I always end
up with 2.75l instesd of 1.75l. When I went to the distiller/dilute
site and used the calculator it worked out just fine. Any idea what
I'm doing wrong?. I am taking the 1 off by the way.
T.I.A
Pilch.
• Pete, I use a similar formula to the one you posted and when compared to Tony s I come up with the same answer. ( Now that is) My Method: Multiply amount
Message 4 of 4 , Feb 21, 2001
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Pete, I use a similar formula to the one you posted and when compared
to Tony's I come up with the same answer. ( Now that is)

My Method:
Multiply amount collected by the percentage collected divided by the
percentage required minus amount collected equels water required.

My way........ 3ltrs. x 94 / 40 - 3 = 4.05ltrs water.

Your way...... 94 / 40 x 3 - 3 = 4.05ltrs water.

Tony's way.... 94 x 40 = 2.35 - 1 = 1.35 x 3 = 4.05ltrs water.

Thanks Tony and Pete, looks like we all have different ways of
cutting but it is handy to know of other ways.
I picked up my way of cutting from some info sent to my neighbour
from Brisbane. The neighbour is a beer brewer and a fine drop at
that. Another thing,has anyone got a copy of a temp. conversion chart
for working out the correct temp. of spirit over 20 deg. Eg: spirit
taken off the still at 94% at a temp. of 30 deg is not 94% therefore
it has to be converted to its correct temp. before cutting. I have
such a chart but it is calculated in lots of 10 and I was looking for
one that is in half or even quarter increments.
Pilch.
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