# calculation

1. ### Calculating percent yield from SG for Brewfather

So I am trying to add apple cider as a fermentable in Brewfather and was told to calculate the percent yield to add it. How do I convert a known SG to percent yield. For example, the cider I get averages 1.053
2. ### How can I measure the CO2 volume in headspace?

For example if I want to measure the CO2 volume in the headspace of a 500mL bottle of carbonated water? How can I do that? Thanks in advance :)
3. ### How much volume is added from honey?

Hello! First of all I just want to say that I suck at math. I'd be more than happy if someone would correct any potential faults in my calculations/reasoning. Also, sorry for my bad england. As I said, math isn't my thing and english isn't my first language . So, a little TL;DR for y'all: 1...
4. ### Can I use the keg carbonation calculator for unflavoured sparkling water as well!?

Hi there I am planning to understand the right pressure and temperature for making sparkling water at home and I stumbled upon the Keg carbonation calculator. I was wondering if I can use it for calculating the pressure needed to carbonate unflavoured water? Also, can anyone please explain what...
5. ### Cold crash suck-back volume estimate?

is there any general guidance for the volume of gas being sucked back when cold crashing? E.g. if I have a 6.5g carboy and 5.5g of beer, and I cold crash from 68F to 35F, what volume of gas should I expect to suck-back? if this is pretty constant and predictable, I'd like to create a large...
6. ### BruNWater vs Mash Made Easy, different PH outcome

Hello everyone I've been trying to wrap my head around BruNwater as I noticed that my PH calculations are off as compared to the Mash Made Easy spreadsheet. Also checked with brewersfriend. Anyone here that could shed some light on this topic as to why BruNwater which I always believed to be...
7. ### Calculate Alcohol after adding puree

I added around 3lbs of apricot puree to a new carboy and put roughly half of my 4.5 gallon batch of beer into that carboy. How could I calculate the alc for this? Thanks!
8. ### Cold Crash followed by priming advice

Hi Guys, So basically I am working on my 2nd batch. I have fermented a 12L batch at 19C for around 15 days. I have now cold crashed my beer for about 24hrs. I used the below website to calculate the priming sugar, but the paragraph in the link states that if cold crashing, less sugar should be...
9. ### Forgot to take an OG reading...any hopes at reverse-calculating?

I brewed a beer last night, and in the haste of trying to finish up and get everything cleaned before it got too late I forgot to take an OG reading. However, I did take gravity readings of first runnings from the mash and last runnings (stupidly not the mixed wort pre-boil). I had hoped to...
10. ### Help with Calculating Water Additions for NYC Water

I've brewed a couple of times and I'd like to learn more about water/mineral adjustments for my next brew. I haven't sent a report out to get my water tested, but I'm using this 2017 NYC Water report (http://www.nyc.gov/html/dep/pdf/wsstate17.pdf) as a base guide to learn. I've read that the...
11. ### Calculating partial boil recipes and Beersmith

I'm sure I'm overlooking something obvious, but I just can't see it... I'm trying to calculate a few recipes for a stove-top partial boil in small pots. Instead of boiling 3kg of malt extract topped up to 15 liters, I want to boil 1kg of malt extract topped up to 5 liters, then add the...
12. ### Calculating total gas produced in fermentation

Hi, I'm trying to answer 2 questions: - how much gas will be produced during fermentation - what would the pressure be in a 5g corny if used as primary fermenter will NO VENTING I tried to calculate this, but the number is absurdly low. What did I do wrong? CALCULATION: -- Assume...