BrewLog: Home Brewing Batch Record Designer

Time	Addition	Amount	Notes
60 min	Bittering hops	____ oz	____
15 min	Flavor hops	____ oz	____
5 min	Aroma hops	____ oz	____
0 min	Whirlpool	____ oz	____

Date	Time	Temp (°F)	Notes
____	____	____	Pitch / Day 0
____	____	____	Day 1
____	____	____	Day 3
____	____	____	Day 7
____	____	____	Day 14

Why structured batch records matter

Most home brewers start with notebooks, phone notes, or memory. That works for a few batches. When you want to repeat a great beer, gaps in your records become problems. Did you mash at 152°F or 154°F? Which hop lot gave that pineapple note? How long did you dry hop? Without answers, you are guessing, not brewing.

BrewLog enforces a complete record without forcing rigidity. Pick the fields that match your setup. Skip what you do not measure. Over time, your saved batches build a personal database of what works.

Common record-keeping mistakes

Missing timestamps. "Fermented for two weeks" is vague. Log dates and temperatures to spot stalls or early finishes.
No ingredient lot numbers. Hop crops vary year to year. A 2023 Cascade is not a 2024 Cascade. Note the supplier and lot.
Ignoring water chemistry. If your beer tastes flat or harsh, water is often the cause. Even basic readings help.
One gravity reading. Take original gravity, pre-boil gravity, and final gravity. Each tells a different story about efficiency and attenuation.
No tasting notes at packaging. Flavor changes over weeks. Notes at kegging, 2 weeks, and 6 weeks reveal the full arc.

How temperature affects your readings

Hydrometers are calibrated for a specific temperature, usually 60°F or 20°C. At 70°F, a reading of 1.050 is actually closer to 1.051. The error compounds at higher temperatures common during hot-side checks. For precise work, use a thermohydrometer or apply correction tables. The sheet leaves space for both raw and corrected values.

Scenario: Diagnosing a stuck fermentation

Your IPA finished at 1.024 instead of 1.012. With good records, you check: mash temperature was 158°F (too high, leaving unfermentable sugars), pitch temperature was 80°F (stressed yeast), and the temperature log shows a spike to 76°F on day 2 (possible off-flavors and early flocculation). Three variables to fix next time. Without records, you blame the yeast and repeat the error.

Comparison: Notebook vs. structured log

Notebook	BrewLog sheet
Freeform, easy to start	Structured, harder to skip fields
Hard to compare batches	Same layout every time
No print formatting	Print-ready, fits in brew folder
Lost or damaged	Digital backup via JSON export
No calculation help	Target fields guide your process

Getting the most from your hydrometer

Spin the hydrometer when you drop it in. Bubbles cling and lift the reading. Read at the meniscus (the curve at the liquid surface), not the top of the wort. Rinse immediately after use; dried sugar throws off the next batch. Store upright in the tube, not loose in a drawer.

Questions

Can I use this for wine, cider, or mead?: Yes. The field system is flexible. Remove mash-related fields and add sugar source, original Brix, and nutrient additions. Save your mead template as a preset for next time.
Why does my printed sheet look different from the preview?: Browsers handle print margins differently. Use the print preview in your browser to check scaling. Set margins to minimum and disable headers and footers for best results.
How long does local storage keep my batches?: Until you clear browser data. Export important batches as JSON files to your computer for permanent backup.
What if I do not take gravity readings?: The sheet still works. Gravity fields are optional. Focus on process notes, timing, and tasting observations. You can always add readings later if you get a hydrometer.

Batch Record Designer

Batch Identity

Equipment & Process

Readings & Notes

Saved Batches

Sheet Preview

Cascade Crush IPA #7

Water & Chemistry

Mash Schedule

Boil & Additions

Gravity & Fermentation

Temperature Log