Step 2

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Missed Step 1? see How to measure density

Measured in gm/ml e.g. 0.390

ENTER THE LAST 3 DIGITS. If you used 1g accurate scales its recommended you get 0.1g accurate scales. But you can enter 0.39g/ml padded with zero, ie 390

Used for the aging table. Tells you when to wait, when to use it, when its best, when its past its prime, and how best to store it.
Used for printing results

If you get the dreaded 'The form was unable to submit', just press Submit a 2nd time.