Kuhnhaus Brewday Calculator

Beer Name

Style

BJCP #

Batch #

Date

Brewing Method

Style Family

Style Targets & Live Estimates

OG

—

FG

—

IBU

—

SRM

—

ABV

—

Batch Vol

Target

—

Est. Original Gravity

—

Pre-boil —

Est. Final Gravity

—

Attenuation —

Est. ABV

—

Actual —

Est. IBU

—

BU:GU —

Est. SRM

—

Color: —

Mash Efficiency

74%

BH Eff —

Strike Water

—

@ —

Sparge Water

—

Total —

Water Profile & pH

Reference Profile

Mineral

Ca²⁺

Mg²⁺

Na⁺

SO₄²⁻

Cl⁻

HCO₃⁻

Target ppm

Actual ppm

—

SO₄ : Cl Ratio—

Est. Mash pH

—

Ideal: 5.20–5.50 · Acceptable: 5.0–5.7

Actual Mash pH

Salt Additions (g/gal total water)

Mash · Sparge Gypsum (CaSO₄) g/gal — Calcium Chloride (CaCl₂) g/gal — Epsom Salt (MgSO₄) g/gal — Baking Soda (NaHCO₃) g/gal — Canning Salt (NaCl) g/gal —

Acid Type

Acid AmountmL

Grain Bill

#	Fermentable	Lbs	Type	Origin	SRM	Yield SG	% Bill	Pts	Cost $
Total		—						$—

Hop Additions

#	Variety	Oz	AA%	Type	Schedule	IBU	Notes	Cost $
Total		—				—		$—

Yeast

Lab / Manufacturer

Yeast Strain

Cost ($)

—

Select a yeast strain

Type: — Lab: — Floc: — Atten: — Temp: —

Choose a lab and strain from the selectors on the left.

Mash Profile

Desired Mash Temp°F

Strike water temp is calculated from grain temp, W/G ratio, and desired mash temp set in Brewhouse Setup.

Select a mash profile above

Actual Measurements

Pre-Boil

Volume (gal)

Gravity (SG)

°Plato: —

Post-Boil

Volume (gal)

Gravity (SG)

°Plato: —

Final / Efficiencies

Final Gravity (SG)

Actual ABV: —

Mash Eff: — BH Eff: —

Cost Summary

Grain$—

Hops$—

Yeast$—

Total Batch$—

Per 12oz bottle: — | Per 16oz: —

Brew Day Notes

Appearance

Theme Preset

Pro users can instantly switch the full color scheme across the app.

Current theme applies to header, cards, borders, accent colors, badges, and action highlights.

Branding

Custom App Title Custom Subtitle Upload Logo

Recommended: transparent PNG or SVG, under 2 MB.

Live Preview

Header Title

Kuhnhaus Brewday Calculator

Process-centered brewing control

Active Theme

Kuhnhaus Dark

Applied instantly across the app

Logo Status

Default

Header logo updates live

Brewday Workflow Mode

Build a live timer from your current mash profile, hop schedule, boil time, and yeast target temperature. Use it as a guided brewday checklist with automatic step progression.

Current Step

Build workflow

Generate your brewday timeline from the recipe tab.

Time Left

00:00

Step 0 / 0

Next Alert

—

No workflow generated yet.

Controls & Setup

Mash In Setup

Sparge Time

Whirlpool Time

Chill Target °F

Tip: update hops, mash profile, or boil time in the Brew Day Notes / Brewhouse tabs, then rebuild.

Workflow Steps

Current Instructions

Do This Now

Ready when you are

Build the workflow and press Start to begin the timer.

Event Log

Process Parameters

Target Batch Volume	qt	10.00	gal	Final packaged beer volume
Ambient Grain Temp	°F	—		Milled grain temp before mashing
Mash Time	min	—		Expected mash length
Extract Efficiency		74%		65–80% typical for batch sparging
Boil Time	min	—		Length of boil
Evaporation Rate	qt/hr	1.25	gal/hr	Rate of evaporation during boil
Hop Absorption Rate	qt/oz	0.038	gal/oz	Typically 0.15 qt per oz of hops
Pitching Temperature	°F	—		Wort temp when racking to fermenter
Water Boil Temp	°F	—		Boiling point at your elevation
W/G Ratio (Strike)	qt/lb	—		1.25–1.5 qt/lb typical
Desired Mash Temp	°F	—		148–156°F; lower = lighter body

Equipment

Brewing Method					Affects grain absorption rate
Size of Mash Tun		qt	15.50	gal	Maximum mash tun capacity
Max Fill % Mash Tun			95%		Max desired fill (≤95%)
Size of Boil Kettle		qt	15.50	gal	Maximum kettle capacity
Mash Tun Deadspace		qt	0.50	gal	Wort left in mash tun after sparge
Boil Kettle Deadspace		qt	0.50	gal	Wort left in kettle after racking
Fermenter Deadspace		qt	0.25	gal	Beer left in fermenter at packaging
Grain Absorption Rate	0.5 qt/lb				Based on selected brewing method

Capacity Checks

🪣

Mash Tun

—

🍲

Boil Kettle

—

Calculated Volumes

Total Water Required	—	qt	—	gal	Accounts for all losses
Strike Water Volume	—	qt	—	gal	Initial mash infusion
Strike Water Temp	—	°F	—		Heat to this temperature
Grain Absorption Loss	—	qt	—	gal	Water retained by grain
Sparge Volume Required	—	qt	—	gal	Batch sparge water
Pre-Boil Volume	—	qt	—	gal	At mash temperature
Evaporation Loss	—	qt	—	gal	Water lost during boil
Post-Boil Volume	—	qt	—	gal	At pitching temperature
Hop Absorption Loss	—	qt	—	gal	Absorbed by hops
Fermenter Volume	—	qt	—	gal	Wort into fermenter
Final Packaged Beer	—	qt	—	gal	After fermenter losses

Pitch Rate Calculator

Yeast Type	Ale
Pitch Rate		M cells/mL/°Plato Ale=0.75 · Lager=1.5 · Hybrid=1.0
Batch Volume	10 gal		from Brewhouse Setup
Original Gravity	1.065		from Brew Day Notes
Overbuild (billion)		extra cells for future starters
Cells Required	— billion
Packs (no starter)	—

Yeast Packet Details

Initial Cell Count		billion cells from packet
Production Date
Viability	— 20% decay per 30 days
Viable Cell Count	— billion

Repitch from Slurry

Slurry Thickness
% Non-Yeast		default 15% — trub, dead cells
Amount to Pitch	— mL
Amount to Harvest	— mL
Slurry to Pitch	— mL total

Stir Plate Starter Calculator

Enter what you have on hand — the calculator shows your expected cell count using the Troester stir plate growth model.

Starter Volume

liters

DME

oz

Add a second step — decant step 1, pitch fresh DME+water

Scale by Volume

Current Volume (qt)—

Desired Volume (qt)

Scale Factor—

#	Grain	Current lbs	Scaled lbs

#	Hop	Current oz	Scaled oz

Scale by Original Gravity

Current OG—

Desired OG

Scale Factor—

#	Grain	Current lbs	Scaled lbs

#	Hop	Current oz	Scaled oz

Copy scaled values to Brew Day Notes and update batch volume in Brewhouse Setup.

Mass / Weight

Ounces →—

Pounds →—

Grams →—

Kilograms →—

Temperature

Fahrenheit →—

Celsius →—

Kelvin →—

Pressure

PSI →

kPa—

Bar—

ATM—

Gravity

SG →—

Brix—

OG for ABV

FG for ABV—

Refractometer Correction

Starting Brix—

Ending Brix

Corrected FG—

Apparent Extract—

Extract Equivalents

DME × 0.75 = LME equivalent

LME × 1.33 = DME equivalent

Grain × 0.75 ≈ LME (at 75% eff.)

Grain × 0.56 ≈ DME (at 75% eff.)

LME = Liquid Malt Extract | DME = Dry Malt Extract

Carbonation Calculator

Beer Temperature°F

Desired CO₂ Volumesvol

Required Serving Pressure

—

PSI at 38°F for 2.4 volumes CO₂

Style Targets

Style	CO₂ Volumes
British Cask Ales	0.75–1.3
American Ales & Lagers	2.2–2.8
German Lager / Pils	2.4–2.8
German Hefeweizen	3.3–4.5
Belgian Ales	2.9–3.5
Lambic / Gueuze	3.5–4.5
Champagne	5.0–6.0

Pressure Reference Table (PSI)

Temp °F	1.5v	2.0v	2.2v	2.4v	2.6v	2.8v	3.0v	3.5v	4.0v

Add / Edit Water Profile

Profile Name

Ca²⁺ (ppm)

Mg²⁺ (ppm)

Na⁺ (ppm)

SO₄²⁻ (ppm)

Cl⁻ (ppm)

HCO₃⁻ (ppm)

Profiles saved here are added to the Water Profile dropdown in the Brew Day Notes tab and persist across sessions.

Saved Profiles

Profile	Ca²⁺	Mg²⁺	Na⁺	SO₄²⁻	Cl⁻	HCO₃⁻	Type

Add / Edit Grain or Fermentable

Name

Type

Origin

Color (SRM)

Yield SG (e.g. 1.036)

Cost ($/lb)

Custom grains appear in the grain dropdown on the Brew Day Notes tab.

Saved Grains

Name	Type	Origin	SRM	Yield SG	$/lb	Source

Add / Edit Hop Variety

Variety Name

Alpha Acid % (AA)

Type

Cost ($/oz)

Flavor / Aroma Notes

Custom hops appear in the hop variety dropdown on the Brew Day Notes tab.

Saved Hops

Variety	AA%	Type	$/oz	Notes	Source

Add / Edit Yeast Strain

Strain ID (e.g. WLP001)

Strain Name

Lab / Manufacturer

Type

Flocculation

Attenuation Range

Avg Attenuation (0–1)

Temp Range

Cost ($)

Description

Custom strains appear in the yeast selector on the Brew Day Notes tab and in Yeast Calcs.

Saved Strains

ID	Name	Lab	Type	Floc	Atten	Temp	Source