So how do you work out the abv in the sense of 5% 6% etc. I'm making ginger beer and previously I would just make it by taste but this time around I want to use a hydrometer to be more exact about the %. TIA
I'll try to keep this fairly simple and not too long. You can calculate the theoretical ABV [using the formula ABV = (OG - FG) * 131.25] and then see how it compares to your measurement. To calculate original gravity we only need the formula Density (g/ml) = Mass (g) / Volume (ml). Let's use a typical recipe: 10L using 1kg sugar and 2 Tbsp (30ml) ginger powder. water sugar ginger combined density 1,000 1,600 0,352 1,036 mass 9 345 1 000 11 10 356 volume 9 345 625 30 10 000 So, our combined density is our original gravity: 1.036. Now, to calculate the final gravity we use attenuation of yeast - basically, most yeasts only perform up to about 70% (and we use the loss of 30% as a factor in our calculation). So, our formula is FG = ((OG - 1) / 3.33) + 1. The FG = 1.011. The final step is using the ABV formula: (1.036 - 1.016) * 131.25 = 3.31%. Many factors will influence the final gravity and therefore the final ABV, including water purity, type and quality of yeast, temperature where it is kept . I used a basic calculation which gives a pretty decent ballpark to work from. Lastly, for a ginger beer of around 5% you would, generally, want to start with an original gravity of about 1.054 which is about 150g of sugar per litre of water. Have fun and keep making that beer. Also try flavouring it with rooibos tea and lemon - sooo good!
Great. Please make a video on how to make alcohol meter too. Please assume that the learner doesn't have access to pure ethyl alcohol, but has access to 42% ABV alcohol.
Great demonstration of a simple hydrometer complete with calibration. well done!!
Could you also use hot glue at the bottom of a straw since it is similar to silicone once hardened?
You can use anything as long as it is waterproof.
Thanks! Also, is it ok if I do 1 mm or does it have to be 2 mm?
@@Chlostt You can do it. No problem.
It doesn't work. I added salt it not going up What's the reason
So how do you work out the abv in the sense of 5% 6% etc. I'm making ginger beer and previously I would just make it by taste but this time around I want to use a hydrometer to be more exact about the %. TIA
ABV = (Original Gravity - Final Gravity) * 131.25
For Example 1,07-0,98 =0,09
0,09*131,25 = 11,8 ABV
@@gksl03 so I've dont the math an basically its either telling me 15% or 1.5%
Goksel ONLU how did u come up with the value of “131.25”
@@johan241292 131,25 is a costant number. Like Pi number is a constant number.
I'll try to keep this fairly simple and not too long.
You can calculate the theoretical ABV [using the formula ABV = (OG - FG) * 131.25] and then see how it compares to your measurement.
To calculate original gravity we only need the formula Density (g/ml) = Mass (g) / Volume (ml). Let's use a typical recipe: 10L using 1kg sugar and 2 Tbsp (30ml) ginger powder.
water sugar ginger combined
density 1,000 1,600 0,352 1,036
mass 9 345 1 000 11 10 356
volume 9 345 625 30 10 000
So, our combined density is our original gravity: 1.036. Now, to calculate the final gravity we use attenuation of yeast - basically, most yeasts only perform up to about 70% (and we use the loss of 30% as a factor in our calculation). So, our formula is FG = ((OG - 1) / 3.33) + 1. The FG = 1.011.
The final step is using the ABV formula: (1.036 - 1.016) * 131.25 = 3.31%.
Many factors will influence the final gravity and therefore the final ABV, including water purity, type and quality of yeast, temperature where it is kept . I used a basic calculation which gives a pretty decent ballpark to work from.
Lastly, for a ginger beer of around 5% you would, generally, want to start with an original gravity of about 1.054 which is about 150g of sugar per litre of water.
Have fun and keep making that beer. Also try flavouring it with rooibos tea and lemon - sooo good!
thank u very much this was wonderful ♥♥♥
Love the music
🤔
The background music is awesome. Any one tell me the song name
Down---------Marian Hill
This is so well done, so neat, so easy, and seems so accurate. A big big thank you.
Have you compared its accuracy against a company made hydrometer?
Your welcome mate. Yes I did. It works perfect.
Great. Please make a video on how to make alcohol meter too. Please assume that the learner doesn't have access to pure ethyl alcohol, but has access to 42% ABV alcohol.
It was make a angle,,when gos high
You probably have placed lighter weight than it should be inside the straw. Put little bit more weight and calibrate it again.
@@gksl03 ok,,,i wil try,,,what about accuracy
Down down down down....
What an utterly annoying song.
Could of done with out the gay music.