Starting Gravity Adjustment Calculator - Available For Use

jamest22 · Mar 30, 2011

After missing my pre-boil and post-boil gravity target the past few brew sessions, I wrote a quick web-based calculator to help make simple gravity adjustments using water dilution and malt extract additions.

I've made the calculator available at the following URL:

http://ahomebrewlog.com/gravity_adjustment/

It works on any mobile device that has a web browser with javascript support and an internet connection.

This calculator is inspired by the Android Brewzor Gravity Adjustment Calculator which I find very useful.

jamest22 · Mar 31, 2011

I forgot to mention that If anyone has any suggestions for improving the calculator, let me know.

Starderup · Mar 31, 2011

jamest22 said:
I forgot to mention that If anyone has any suggestions for improving the calculator, let me know.

The first thing that came to mind was adding drop down control with oz and lb increments so you could calculate the result when adding 1 lb of DME, etc.

Nice.

jamest22 · Mar 31, 2011

Starderup said:
The first thing that came to mind was adding drop down control with oz and lb increments so you could calculate the result when adding 1 lb of DME, etc.

Nice.

Thanks. Good suggestion. I'll work on adding an option for ounces or pounds.

jamest22 · Apr 3, 2011

Based on feedback, I updated the gravity adjustment calculator to include options for units. DME additions can now be calculated in either pounds or ounces. Water additions can now be calculated in either quarts or gallons.

http://www.ahomebrewlog.com/gravity_adjustment/

Once again, let me know if you see any room for improvement. Also, I'd love to hear feedback from anyone who has used it during a brewing session.

buckeye2011 · Dec 14, 2011

Just wanted to let you know that I used this calculator last night. Since the Ohio winter is upon us, I decided to experiment with doing concentrated all grain boils on my stove top using ~4 gallon boil. I did a batch of Janet's Brown. Mashed 4 gallons, dunk sparged in 1.5 gallons. Ended up with 3.7 gallons of 1.080 wort after the boil and used this calculator to figure out how much top off water I needed to get the OG down to 1.061. Ended up being just over a gallon. Almost perfect. This really came in handy and will be something I use again.

Thanks for the help!

jamest22 · Dec 14, 2011

buckeye2011 said:
Just wanted to let you know that I used this calculator last night. Since the Ohio winter is upon us, I decided to experiment with doing concentrated all grain boils on my stove top using ~4 gallon boil. I did a batch of Janet's Brown. Mashed 4 gallons, dunk sparged in 1.5 gallons. Ended up with 3.7 gallons of 1.080 wort after the boil and used this calculator to figure out how much top off water I needed to get the OG down to 1.061. Ended up being just over a gallon. Almost perfect. This really came in handy and will be something I use again.

Thanks for the help!

Glad to hear its getting some use!

stux · Dec 14, 2011

jamest22 said:
Based on feedback, I updated the gravity adjustment calculator to include options for units. DME additions can now be calculated in either pounds or ounces. Water additions can now be calculated in either quarts or gallons.

Boil Gravity Adjustment Calculator

Once again, let me know if you see any room for improvement. Also, I'd love to hear feedback from anyone who has used it during a brewing session.

How about adding litres and kilograms too?

jamest22 · Dec 14, 2011

stux said:
How about adding litres and kilograms too?

That is a great suggestion. It'll be the next feature I add.

enkamania · Dec 14, 2011

I'll definitely use this. I panicked on my last batch and just threw in the extract I had on hand. Now I have a 8.2% Citra IPA

jamest22 · Dec 29, 2011

Based on feedback, I just updated the Gravity Adjustment Calculator to provide support for metric units. Happy Brewing!

pinback · Dec 30, 2011

thanks Jamest22! this is a great calculator!

CanadianQuaffer · Dec 30, 2011

This is an excellent idea, but maybe I'm missing something 'cos I can't get it to work?
After completing all the fields and hitting "calculate" nothing appears in the "Adjust by adding:" field.

Do I need a plug-in or something?

Thanks!

Nick

Kate00 · Dec 30, 2011

Nice job!

This will be handy to have.

alestateyall · Dec 30, 2011

BrewCalc app on iPhone also has a calculator for same function.

CanadianQuaffer · Dec 31, 2011

It works now, thanks!

rancidcrabtree · Dec 31, 2011

Just added to my HomeBrew bookmarks tab in Chrome, thanks a lot!

Flomaster · Dec 31, 2011

****ing awesome

Grumpybumpy · Dec 31, 2011

Bookmarked in my phone! Very nicely done, sir

jamest22 · Jan 7, 2012

CanadianQuaffer said:
This is an excellent idea, but maybe I'm missing something 'cos I can't get it to work?
After completing all the fields and hitting "calculate" nothing appears in the "Adjust by adding:" field.

Do I need a plug-in or something?

Thanks!

Nick

I have made an update that should correct the issue you were experiencing.

Cheers!

:mug:

dcarter · Sep 23, 2012

Great tool! Used it last night!

signpost · Apr 27, 2014

I this site no longer up? Or is it just temporarily down?

Starting Gravity Adjustment Calculator - Available For Use

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