01 — Meadcraft
You skipped the nutrient math.
Meadcraft brings every calculation a meadmaker needs — TOSNA schedules, ABV, batch blending, gravity conversion — into one precise, free toolkit. No spreadsheets. No guessing.
Total YAN
330 ppm
Ferm O
18.5 g
Additions
4 doses
Addition
Ferm O
Ferm K
DAP
Next addition in 22h
4
Precision tools
In one place
330
ppm YAN target
For 1.120 OG
0.001
SG resolution
Brix ↔ gravity
∞
Batch blends
Adjust to taste
02 — The problem
Mead must is nutritionally barren. No free amino nitrogen, almost no vitamins, no minerals a yeast cell can use to build membranes and metabolize sugar cleanly. Leave it unfed and you get stuck fermentations, sulfur reek, rocket-fuel fusels.
The calculation exists. The white paper is out there. The problem is every meadmaker is juggling a spreadsheet, a forum thread, and three different nutrient protocols — and getting a different answer each time.
01
Yeast starved for nitrogen stall mid-ferment, leaving behind sugar and sadness.
02
Stressed yeast produce isoamyl alcohol and H₂S — off-flavors that take a year to age out, maybe.
03
Every batch is a fresh scavenger hunt across spreadsheets, forum posts, and competing protocols.
04 — Philosophy
"Meadcraft exists because mead deserves the same rigour as wine. The chemistry is documented. The protocols are proven. The only thing missing was a tool that didn't treat the brewer like a beginner."
— Meadcraft
05 — The toolkit
Four tools. Each one does one thing precisely. No upsell, no account required.
Tool 01
TOSNA-based staggered additions built from your exact batch: volume, starting gravity, yeast strain, and nitrogen requirement. Enforces US legal limits for Fermaid K and DAP by default. Override them when you know what you're doing.
Total YAN
330 ppm
Ferm O
18.5 g
Additions
4 doses
Addition
Ferm O
Ferm K
DAP
Next addition in 22h
Tool 02
Original and final gravity in, ABV out. Uses the precise SG→Brix conversion combined with Hall's real-extract equations — not the simplistic 131 formula.
Tool 03
Hit your target sweetness by blending two batches. Input gravity, ABV, and volume of each. Get the blended result instantly — dial in before you commit.
Batch A — Trad
Batch B — Melomel
Blend Result — 5 gal
Tool 04
Your refractometer reads Brix. Your hydrometer reads SG. Convert either direction using the equations from Just How Much Honey Is in Your Mead — not the approximation the rest of the internet uses. Valid pre-fermentation only, as stated.
SG ↔ Brix
SG → Brix
1.120
28.12 °Bx
Brix → SG
22.0 °Bx
1.091
06 — How it works
Step 1
Batch volume, target OG, yeast strain, nitrogen requirement level. Takes thirty seconds.
Step 2
The nutrient calculator outputs gram weights for each addition at precise timing points: hour 24, 1/3, 1/2, and 2/3 sugar break.
Step 3
Cross-check ABV as fermentation closes. Blend batches to hit your residual sweetness. Convert units on the fly.
07 — From the community
"I ran four batches in a row without a stuck fermentation. Turns out the math was never that hard — I just needed one place to do it."
Tom W.
5-gallon batches · EC-1118 · r/mead
"The blending tool saved a whole batch. One trad too dry, one melomel too sweet. Mixed them at exactly 60/40 and landed 12.8% at 1.010. Perfect."
Priya S.
Melomels · 71B yeast · Homebrewer
"I used to copy the TOSNA spreadsheet every time. Now I just put in the numbers and go. Saves twenty minutes a batch, minimum."
Marcus D.
Traditional mead · D47 · 3 years brewing
08 — FAQ
09 — Get started
Enter your email to get notified when Meadcraft launches batch-logging and recipe saving. The tools are available now — no account needed.
The Mead Lab
Staggered Nutrient Additions (SNA) and TOSNA are the two most debated topics on r/mead — and for good reason. Getting your nutrient schedule right is the single biggest lever new meadmakers can pull to eliminate off-flavors and stuck ferments. This guide breaks down both protocols, when to use each, and how an advanced SNA calculator takes the guesswork out entirely.
Hydrometers, refractometers, Brix, and specific gravity — the measurement side of meadmaking trips up beginners and intermediate brewers alike. This post walks through exactly how ABV is calculated from OG and FG readings, why the standard formula diverges after active fermentation, and how a dedicated mead ABV calculator handles the corrections automatically.
Blending two meads to balance sweetness, acidity, or ABV sounds simple until you've bottled a batch that tastes worse than either half did alone. From mismatched SO2 levels to refermentation disasters, these are the seven blending mistakes r/mead users report most — and the exact calculations a batch blender tool runs to prevent them.