How Much Soy Milk Does 1 kg of Soybeans Really Produce?

Published: November 2026 | By YASILE Engineering Team

One kilogram of dry soybeans produces 6–8 liters of finished soy milk in a commercial machine — plan on 7 liters as a safe planning average. The exact number depends on three levers you control: the water-to-soybean ratio you run, how long the beans soak, and how fine your machine grinds. This yield data sheet answers how much soy milk does 1 kg of soybeans produce at three working ratios, then converts the numbers into machine-hour planning so you can size equipment and bean orders without guesswork. It is compiled on the production floor of YASILE, the commercial brand of Zhenjiang Yasile Kitchen Appliance Co., Ltd., a China-based factory manufacturing pulping machinery for restaurants since 1999.

1. What Water-to-Soybean Ratio Should Commercial Soy Milk Production Use?

Most commercial kitchens run the water to soybean ratio for commercial soy milk production between 1:8 and 1:10 by dry weight — richer drinks lean toward 1:8, volume-driven service toward 1:10. The ratio is set after soaking, against dry-bean weight, and it moves the yield more than any machine setting:

• 1:6 ratio (1 kg beans + 6 L water): 5.5–6.5 L of thick, full-bodied milk — the density hotpot broth bases and silken tofu shops want.

• 1:8 ratio: 7–8 L — the breakfast-shop standard; creamy enough to sell straight, stable in coffee and tea mixes.

• 1:10 ratio: 9–10 L of lighter milk — fine for blended beverages where sugar, tea or fruit carry the flavor, noticeably thin for plain service.

Soaking shifts the machine-side math: dry beans absorb 1.2–2× their weight in 8–12 hours of soak, so 1 kg dry becomes roughly 2.2–3 kg soaked going into the hopper. Grind fineness matters too — a worn or widely gapped grinding wheel leaves milk locked in the pulp, and the same kilogram can yield a full liter less. Lock the water to soybean ratio for commercial soy milk production on a laminated card beside the hopper and the yield stops drifting. The YASILE 100 Standard holds a 95 mm grinding wheel at 2,800 RPM with an adjustable gap, which is how it keeps yield at the top of the 6–8 L band batch after batch.

✅ Bottom line: Run 1:8 for plain drinking milk and expect 7–8 liters per kilogram; every step toward 1:10 buys volume but costs body.

2. Commercial Soy Milk Maker Capacity kg per Hour Explained

Commercial soy milk maker capacity kg per hour explained simply: spec sheets rate machines in soaked beans ground per hour, so divide by about 2.5 to get dry-bean input, then multiply by your yield ratio for liters. That one conversion resolves most sizing confusion. Take a machine rated at 20–25 kg of soaked beans per hour — the typical class for a 750W self-separating unit:

• Dry-bean input: 25 kg soaked ÷ 2.5 ≈ 10 kg dry per hour.

• Milk output at 1:8: 10 kg dry × 7.5 L/kg ≈ 75 liters per hour of rated grinding.

• Morning-rush planning: 200 cups × 250 ml = 50 L needs 6.5–7 kg dry beans, so the whole rush grinds in about 30–40 minutes with the machine cooling for the rest of the day.

Sizing rule of thumb: add your daily liter target at 1:8, divide by 75, and that is how many machine-hours of grinding you need — anything under one hour points to a single 750W–1,100W unit, sustained multi-hour service points to a bigger motor or two machines. The YASILE self-separating range spans exactly those duty levels.

✅ Bottom line: Convert spec-sheet ratings with soaked ÷ 2.5 × yield — a 25 kg/h machine is really a 75-liter-per-hour milk machine.

Frequently Asked Questions

Q: Does soaking longer than 12 hours raise the yield?
A: No — past 12 hours (8 in summer) beans start to sour and the yield gain stops. Hold soaked beans refrigerated if prep runs ahead of schedule.

Q: Can one machine handle rice milk and nut milk with the same yield math?
A: The grinding mechanics are the same, but yields differ — rice runs about 4–5 L per kg and almonds 3–4 L per kg. YASILE units grind all three; just re-plan your ratios per ingredient.

Q: What yield should we promise our cost sheet?
A: Plan on 7 L per kg — that is the dependable answer to how much soy milk does 1 kg of soybeans produce at the 1:8 setting. If your measured yield drops below 6 L, the cause is almost always the grinding gap or a worn wheel — a factory-direct replacement set from Zhenjiang Yasile Kitchen Appliance Co., Ltd. restores it in minutes; see the 100 Standard for the included spares.

Get a Copy-Ready Yield Chart for Your Menu

Tell YASILE your daily cup count and menu thickness preferences, and our engineers will send a yield and bean-order planning chart for your exact volumes, plus a factory-direct machine quotation — free within one business day. Buyers comparing wholesale equipment options can use the same chart to size one machine or a two-machine setup. Contact YASILE — built on pulping-line manufacturing experience in Zhenjiang, China since 1999.

http://www.yslcookgear.com
Zhenjiang Yasile Kitchen Appliances Co., Ltd.