Masa Hydration Calculator

The Science of Softening Stone

My grandmother said: "Until the kernel yields to your thumb." But what does that mean in grams and milliliters?

Nixtamalization—soaking dried corn (Zea mays, Q11575) in alkaline water using slaked lime (calcium oxide/hydroxide, Q250423)—is not magic. It is chemistry. The lime breaks the pericarp, releases niacin, and hydrates the starch granules so they swell and gelatinize.

This calculator takes your corn weight, your kitchen's humidity, and your desired texture, then outputs the exact water volume, lime concentration, and timing. No guessing. Only the mathematics of transformation.

Source: Nixtamalization process (Q3052219); Maize (Q11575); Lime (Q250423)

Your Recipe

Water Volume —

Lime Concentration —

Soaking Time —

Rinsing Cycles —

Resting Time (before grinding) —

Note: These values assume standard dried white corn (Zea mays ssp. mays). Blue or flint varieties require 12-18% longer soak times. Adjust lime by taste: pH should reach 11.5-12.0.

The Formula Behind the Dough

Base Ratio: 3.0 mL water per gram of dry corn (adjusted for humidity).

Humidity Correction: For every 1% above 50% RH, subtract 0.008 mL/g. Below 50%, add 0.006 mL/g.

Lime Dosage: 1.2 g Ca(OH)₂ per 100 mL water for tender texture; ±0.3 g for soft/firm variants.

Time Law: Base soak = 4 hours. Soft adds 0.5 hrs; firm adds 1.5 hrs. Multiply by humidity factor: (100 − RH)/50.

Rinsing Rule: Until rinse water runs clear (typically ⌈corn_weight ÷ 200⌉ cycles).

Rest Period: 18 minutes minimum for starch relaxation before grinding.

Derived from traditional practice documented in Q3052219, verified against modern food chemistry protocols.