Sugar Formula: Chemical Formula, Types, Structure and Examples

The Sugar Formula for standard table sugar, also called sucrose, is C₁₂H₂₂O₁₁, which means one molecule has 12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms.
Different sugars have different formulas, such as glucose C₆H₁₂O₆, fructose C₆H₁₂O₆ and lactose C₁₂H₂₂O₁₁.

The Sugar Formula is useful when students need to identify table sugar, compare simple sugars and understand carbohydrates in Chemistry and Biology. In school-level questions, “sugar” usually refers to sucrose, while glucose, fructose and lactose are named separately. This distinction helps students avoid mixing the formula of table sugar with the formula of glucose.

In Class 10, Class 11 and Class 12 Science, sugar formulas appear in Biomolecules, carbohydrates, nutrition, digestion and organic chemistry basics. CBSE, ICSE, state board and NEET foundation questions may ask for the chemical formula of sugar, the number of atoms in C₁₂H₂₂O₁₁, the glucose formula C₆H₁₂O₆, or the difference between glucose and fructose.

Key Takeaways

• Sugar Formula: The chemical formula of table sugar or sucrose is C₁₂H₂₂O₁₁.
• Atom Count: One sucrose molecule has 12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms.
• Simple Sugars: Glucose and fructose have the same molecular formula, C₆H₁₂O₆.
• Milk Sugar: Lactose has the formula C₁₂H₂₂O₁₁, the same molecular formula as sucrose.

Sugar Formula Structure 2026

What is Sugar Formula?

The Sugar Formula commonly refers to the chemical formula of sucrose, which is C₁₂H₂₂O₁₁. Sucrose is the white crystalline sugar used as table sugar.

Formula:

C₁₂H₂₂O₁₁

Where:

• C = carbon
• H = hydrogen
• O = oxygen

Atom count in sucrose:

• Carbon atoms = 12
• Hydrogen atoms = 22
• Oxygen atoms = 11

The formula shows the number and type of atoms present in one molecule of sucrose.

Chemical Formula of Sugar

The chemical formula of sugar, when referring to standard table sugar, is C₁₂H₂₂O₁₁. This formula belongs to sucrose, a disaccharide made from glucose and fructose units.

Formula:

C₁₂H₂₂O₁₁

Molecular representation:

C₁₂H₂₂O₁₁ = 12C + 22H + 11O

This means:

1 molecule of sucrose = 12 carbon atoms + 22 hydrogen atoms + 11 oxygen atoms

Sucrose is classified as a carbohydrate because it contains carbon, hydrogen and oxygen atoms. The hydrogen and oxygen ratio is close to 2:1, which is common in many carbohydrates.

Sugar Molecular Formula

The sugar molecular formula depends on the type of sugar being discussed. Table sugar is sucrose, while many biological processes involve glucose.

Glucose and fructose have the same molecular formula but different structures. Sucrose, lactose and maltose also share the same molecular formula but have different bonding arrangements.

Sucrose Formula

Sucrose is the chemical name of table sugar. The sucrose formula is C₁₂H₂₂O₁₁.

Formula:

C₁₂H₂₂O₁₁

Sucrose is made when one glucose molecule and one fructose molecule join together. During this joining, one water molecule is removed.

Formation of sucrose:

C₆H₁₂O₆ + C₆H₁₂O₆ → C₁₂H₂₂O₁₁ + H₂O

This is a condensation reaction because water is formed as a by-product.

In words:

Glucose + Fructose → Sucrose + Water

Sucrose is found in sugarcane, sugar beet and many sweet plant-based foods.

Table Sugar Formula

The table sugar formula is C₁₂H₂₂O₁₁ because table sugar is chemically known as sucrose. It is a disaccharide made from glucose and fructose.

Formula:

C₁₂H₂₂O₁₁

Atom count:

• 12 carbon atoms
• 22 hydrogen atoms
• 11 oxygen atoms

This formula is important in sugar formula chemistry because it helps students identify table sugar separately from glucose and fructose.

Glucose Formula

The glucose formula is C₆H₁₂O₆. Glucose is a simple sugar and an important source of energy for cells.

Formula:

C₆H₁₂O₆

Atom count in glucose:

• Carbon atoms = 6
• Hydrogen atoms = 12
• Oxygen atoms = 6

Glucose is a monosaccharide, which means it is a single sugar unit. It is commonly found in blood, plants and energy-related Biology questions.

Glucose is also produced during photosynthesis:

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

In words:

Carbon dioxide + Water → Glucose + Oxygen

This equation is important in Biology and Chemistry chapters on plants, nutrition and energy.

Fructose Formula

The fructose formula is C₆H₁₂O₆. Fructose is a simple sugar commonly found in fruits and honey.

Formula:

C₆H₁₂O₆

Fructose has the same molecular formula as glucose. Its structure is different, so its properties and sweetness are also different.

Glucose and fructose are structural isomers because they have the same molecular formula but different atom arrangements.

Comparison:

Fructose combines with glucose to form sucrose.

Lactose Formula

Lactose is the sugar found in milk. The lactose formula is C₁₂H₂₂O₁₁.

Formula:

C₁₂H₂₂O₁₁

Lactose is a disaccharide made from glucose and galactose units. It has the same molecular formula as sucrose but a different structure.

Formation of lactose:

Glucose + Galactose → Lactose + Water

Formula form:

C₆H₁₂O₆ + C₆H₁₂O₆ → C₁₂H₂₂O₁₁ + H₂O

Lactose appears in Biology topics related to milk, digestion and enzymes.

Types of Sugar Formula

Different sugars have different formulas because their molecular structures and sugar units vary. Some sugars are single units, while others are formed by joining two units.

Monosaccharides have one sugar unit. Disaccharides have two sugar units joined by a glycosidic bond.

Structure of Sugar

Sugar molecules contain carbon, hydrogen and oxygen atoms arranged in rings or chains. Their structure decides their type, sweetness and chemical behaviour.

Sucrose structure contains:

• One glucose unit
• One fructose unit
• One glycosidic bond
• Carbon, hydrogen and oxygen atoms

Basic representation:

Glucose unit − O − Fructose unit

Sucrose is a disaccharide because it contains two monosaccharide units. The bond between glucose and fructose is called a glycosidic bond.

Sugar Formula in Carbohydrates

Sugars are carbohydrates because they are made of carbon, hydrogen and oxygen. Many simple carbohydrates follow the general pattern Cₙ(H₂O)ₙ.

General carbohydrate pattern:

Cₙ(H₂O)ₙ

For glucose:

C₆H₁₂O₆

This can be written as:

C₆(H₂O)₆

For sucrose:

C₁₂H₂₂O₁₁

Sucrose has two fewer hydrogen atoms and one fewer oxygen atom than two separate C₆H₁₂O₆ molecules because water is removed during bond formation.

Calculation:

C₆H₁₂O₆ + C₆H₁₂O₆ = C₁₂H₂₄O₁₂

Remove water:

C₁₂H₂₄O₁₂ − H₂O = C₁₂H₂₂O₁₁

So:

C₁₂H₂₂O₁₁ is formed.

How Sucrose is Formed from Glucose and Fructose

Sucrose forms when glucose and fructose join through a condensation reaction. A water molecule is released during the reaction.

Step-by-step formation:

1. Start with glucose:

C₆H₁₂O₆

1. Add fructose:

C₆H₁₂O₆

1. Combine both formulas:

C₁₂H₂₄O₁₂

1. Remove water:

H₂O

1. Final sucrose formula:

C₁₂H₂₂O₁₁

Equation:

C₆H₁₂O₆ + C₆H₁₂O₆ → C₁₂H₂₂O₁₁ + H₂O

This explains why sucrose has the formula C₁₂H₂₂O₁₁ instead of C₁₂H₂₄O₁₂.

Molecular Mass of Sugar

The molecular mass of sugar can be calculated from the formula C₁₂H₂₂O₁₁. Use atomic masses: carbon = 12, hydrogen = 1, oxygen = 16.

Formula:

C₁₂H₂₂O₁₁

Calculation:

Molecular mass = (12 × 12) + (22 × 1) + (11 × 16)

Molecular mass = 144 + 22 + 176

Molecular mass = 342 u

So, molecular mass of sucrose is:

342 u

In molar mass form:

342 g/mol

This value is useful in Chemistry numericals involving moles and molecular mass.

Solved Examples on Sugar Formula

Sugar Formula questions usually ask for chemical formula, atom count, molecular mass or comparison between different sugars. Read whether the question refers to table sugar, glucose or milk sugar.

Example 1: Write the chemical formula of table sugar

Answer:

The chemical formula of table sugar or sucrose is:

C₁₂H₂₂O₁₁

It contains:

• 12 carbon atoms
• 22 hydrogen atoms
• 11 oxygen atoms

Example 2: Find the molecular mass of sucrose

Given:

Formula of sucrose:

C₁₂H₂₂O₁₁

Atomic masses:

C = 12

H = 1

O = 16

Calculation:

Molecular mass = (12 × 12) + (22 × 1) + (11 × 16)

Molecular mass = 144 + 22 + 176

Molecular mass = 342 u

Answer:

The molecular mass of sucrose is 342 u.

Example 3: Find the number of atoms in one molecule of sucrose

Given formula:

C₁₂H₂₂O₁₁

Atom count:

Carbon = 12

Hydrogen = 22

Oxygen = 11

Total atoms:

12 + 22 + 11 = 45

Answer:

One molecule of sucrose contains 45 atoms.

Example 4: Show how sucrose forms from glucose and fructose

Glucose formula:

C₆H₁₂O₆

Fructose formula:

C₆H₁₂O₆

Combined formula:

C₁₂H₂₄O₁₂

One water molecule is removed:

C₁₂H₂₄O₁₂ − H₂O = C₁₂H₂₂O₁₁

Equation:

C₆H₁₂O₆ + C₆H₁₂O₆ → C₁₂H₂₂O₁₁ + H₂O

Answer:

Sucrose forms when glucose and fructose join through condensation and release water.

Common Mistakes in Sugar Formula

Many sugar formula mistakes happen when students use glucose formula for table sugar. Table sugar is sucrose, so its formula is C₁₂H₂₂O₁₁.

Important checks:

• Use C₁₂H₂₂O₁₁ for table sugar.
• Use C₆H₁₂O₆ for glucose.
• Use C₆H₁₂O₆ for fructose.
• Use C₁₂H₂₂O₁₁ for lactose.
• Count atoms directly from subscripts.
• Use 342 u as the molecular mass of sucrose.

In formula-based questions, identify the sugar type before writing the formula.

Applications of Sugar Formula

The Sugar Formula is useful in Chemistry, Biology, nutrition and food science. It helps explain carbohydrate structure, energy release and digestion.

Main applications:

• It helps identify sucrose, glucose, fructose and lactose.
• It is used in carbohydrate classification.
• It helps calculate molecular mass.
• It supports mole concept numericals.
• It explains condensation reactions in carbohydrates.
• It helps students understand digestion and energy release.
• It is used in Biology chapters on nutrition and respiration.