How Much Curd From 1 Litre Milk? Dahi Yield Guide

Quick answer: 1 litre of milk usually gives about 950 g to 1.05 kg of plain curd (dahi) because the milk is fermented, not strained. The final quantity changes slightly with evaporation during heating, the amount of starter added and the milk’s total solids. Buffalo milk does not necessarily give much more curd by weight, but it usually gives a thicker, richer set because it contains more fat and total solids.

If you are making hung curd or Greek-style yogurt, the yield is lower because whey is removed after fermentation. That is a different calculation from regular dahi.

Curd yield from 1 litre milk: quick table

These are practical ranges, not guaranteed production figures. At commercial scale, milk composition, standardisation, heat treatment, culture activity and final moisture specification should be measured batch by batch.

Why 1 litre of milk gives almost 1 kg of dahi

Paneer and ghee have very different recovery because part of the milk is separated and removed during processing. Dahi is different. In regular dahi manufacture, almost the entire milk remains in the cup. Lactic acid bacteria ferment lactose and lower the pH, which causes the milk proteins to form the familiar gel structure.

So the main change is structure and acidity, not removal of a large portion of milk. That is why plain dahi has a yield close to 1:1 by weight.

India’s food standards classify dahi as a fermented milk product produced using lactic acid bacteria. You can review the official fermented-milk standard on the FSSAI website.

Cow milk vs buffalo milk curd: which gives more?

If both are converted into plain set curd without straining, the weight difference is usually small. The bigger difference is in body and texture.

• Cow milk curd: generally lighter, softer and less creamy.
• Buffalo milk curd: generally thicker, whiter and richer because buffalo milk normally contains more fat and total solids.
• Toned milk curd: can set well, but may feel thinner because the fat and total solids are lower.

This distinction matters if you are manufacturing dahi commercially. A buyer does not judge only the kilograms recovered. They judge firmness, whey separation, smoothness, acidity, taste and consistency across batches.

How much starter is needed for 1 litre milk?

For home-scale preparation using fresh dahi as the starter, a practical starting point is around 1-2% starter by weight. In simple terms, that is roughly 10-20 g for 1 litre of milk. The exact amount depends on how active the starter is and the incubation conditions.

Adding more starter does not automatically make better curd. Too much active starter, or holding the product warm for too long, can increase acidity quickly and make the dahi overly sour.

Commercial plants normally use defined starter cultures with controlled dosage rather than relying on an arbitrary spoon measure. NDDB notes that starter cultures are used for commercial manufacture of dahi and other fermented dairy products. See NDDB’s dairy products and starter cultures information.

Best temperature for setting dahi

Temperature is one of the biggest reasons one batch sets properly and another remains weak or turns sour.

For thermophilic commercial dahi cultures, incubation is typically carried out in a warm range around 40-45°C, depending on the culture supplier’s specification. Household dahi made from a previous batch can behave differently because the microbial population is not standardised.

A useful practical sequence is:

1. Heat the milk sufficiently to improve microbial safety and protein functionality.
2. Cool it to the required inoculation temperature.
3. Add the starter and mix gently.
4. Keep the milk undisturbed during incubation.
5. Once the desired set and acidity are reached, cool the curd promptly.

For commercial production, always follow the validated process and starter-culture instructions rather than a fixed household time-temperature rule.

Why does curd become watery?

The liquid you see separating from curd is whey. A small amount can occur naturally, but excessive whey separation, called syneresis, usually points to a process issue.

Common causes include:

• low total solids in the milk;
• disturbing the cup before the gel has fully formed;
• excess acidity from over-incubation;
• weak or inconsistent starter activity;
• insufficient heat treatment for the desired texture;
• temperature fluctuations during setting or storage.

In a dairy plant, fixing watery curd should start with data: fat, SNF or total solids, pasteurisation record, homogenisation condition if used, inoculation rate, culture lot, incubation temperature, end pH/acidity, cooling curve and cold-chain temperature.

How to get thicker curd from the same 1 litre of milk

If the goal is thicker dahi, do not focus only on adding more starter. Better thickness usually comes from controlling the milk solids and the process.

• Use milk with adequate fat and SNF for the target product.
• Avoid excessive dilution.
• Use a consistent heat treatment.
• Use a fresh, active starter culture at the correct dose.
• Maintain a stable incubation temperature.
• Stop fermentation at the target acidity and cool promptly.
• Avoid shaking or moving set curd before it is adequately chilled.

At industrial scale, standardisation and homogenisation can be used to achieve a much more consistent texture from batch to batch.

How much milk is needed for 1 kg curd?

For plain dahi, a good planning number is approximately 1 litre of milk for about 1 kg of finished curd. In real manufacturing, use your own measured recovery because density, evaporation, starter addition and handling losses will move the result slightly.

For example, if your plant fills 10,000 kg of dahi per day, the milk requirement will be close to 10,000 litres, but the exact mass balance should be based on kilograms, milk density and formulation rather than a simple litre-to-kilogram assumption.

What about hung curd and Greek yogurt?

Hung curd and Greek-style yogurt are concentrated fermented products. Once the set curd is strained, whey leaves the product and the yield drops. Longer or tighter straining gives a thicker product but lower recovery.

This is why 1 litre of milk can give nearly 1 kg of regular dahi but only about 500-700 g of a concentrated Greek-style product. If the starting milk is fortified with milk solids or concentrated before fermentation, recovery can be higher.

Simple production calculation

For regular dahi:

Approximate dahi output (kg) = Milk input (litres) × practical recovery factor

For a first estimate, a recovery factor near 1.0 is reasonable. A dairy should then replace that assumption with its actual batch data.

Example: if 1,000 litres of milk consistently gives 1,015 kg packed dahi after starter addition and normal process effects, the practical recovery factor is 1.015. That factor can then be used for production planning, costing and variance control.

Frequently asked questions

Can 1 litre milk make more than 1 kg curd?

It can finish slightly above 1 kg if the starting milk mass, starter addition and formulation together exceed 1 kg and there is little evaporation. But for ordinary household dahi, think of the yield as roughly 1 kg rather than expecting a large gain in quantity.

Does buffalo milk give more curd than cow milk?

Not dramatically more plain curd by weight, because neither product is normally strained. Buffalo milk usually gives a thicker and richer curd because it has higher fat and total solids.

How much curd can I get from 500 ml milk?

Approximately 475-525 g of plain dahi is a practical estimate.

How much curd can I get from 2 litres milk?

Approximately 1.9-2.1 kg of plain dahi, depending on evaporation and the amount of starter or added milk solids.

Why is my curd not setting?

The usual causes are inactive starter, milk that is too hot or too cold at inoculation, insufficient incubation time, antibiotic or sanitizer residues, or poor culture handling.

Bottom line

If you are asking “how much curd from 1 litre milk?”, the practical answer is about 1 kg of plain dahi. Cow milk, buffalo milk and toned milk can all produce roughly the same quantity, but the texture and richness can differ substantially. For hung curd or Greek-style yogurt, expect a lower yield because whey is intentionally removed.

For more dairy comparisons, read Ghee vs Butter: Nutrition, Smoke Point, Cooking Uses & Which to Choose.

Featured image: Lee Milo via Unsplash.