Water calculations for small batch

[AJ_Rowley]

Hey guys.

With my first all-grain small batch fermenting away I want to start building my own recipes but the main thing I'm a bit lost on is calculating how much water I need.

For those of you who do small batches on the stove would you be able to help me. I have a 10l pot so was hoping to eventually get 5 litres in fermenter.

Would anyone here have some advice on how the calculate how much water u would need.

[Ciderhead]

AJ use beersmith, it will give your exact qtys
You can scale it to whatever vol you want

[baphomite51]

are you doing BIAB or are u using a mashtun?

[AJ_Rowley]

Neither I'm sparging using a colander. Though I might change to biab

[pob]

Next time you've 1/2 hour free drop up & I'll go through Beersmith & BIAB, it'll make life a lot easier.
What method are you using, I'm guessing a variation on BIAB, you mentioned a mash kit a while back.

[UpsidedownA (Andrew)]

These are my rules of thumb.
The malt soaks up one litre for every kilogramme, i.e. 12 litres of strike water to 4 kilos of grain gives you eight litres of first runnings.
Evaporation is up to 20% depending on how much you boil. 25 litres pre boil gives 20 litres post boil.
And leaf hops soak up about 1-2 litres.