Mean Molecular Weight (MME) Calculator

Calculate the average molecular weight of a mixture

Enter the amount and molecular weight for each component in your mixture. Add or remove components as needed. The calculator will provide the mean molecular weight, total amount, and the proportion of each component.

Examples

See how to use the Mean Molecular Weight Calculator with real-world mixtures.

Simple Binary Mixture

mixture

A mixture of 10g glucose (180.16 g/mol) and 20g sucrose (342.30 g/mol)

Amount #1: 10

Molecular Weight #1: 180.16

Amount #2: 20

Molecular Weight #2: 342.3

Pharmaceutical Formulation

mixture

A tablet contains 5g active ingredient (300.25 g/mol), 15g filler (44.05 g/mol), and 2g binder (162.14 g/mol)

Amount #1: 5

Molecular Weight #1: 300.25

Amount #2: 15

Molecular Weight #2: 44.05

Amount #3: 2

Molecular Weight #3: 162.14

Nutrition Supplement Mix

mixture

A supplement blend with 8g protein (75.0 g/mol), 12g carbohydrate (180.16 g/mol), 5g fat (885.0 g/mol)

Amount #1: 8

Molecular Weight #1: 75

Amount #2: 12

Molecular Weight #2: 180.16

Amount #3: 5

Molecular Weight #3: 885

Chemical Engineering Example

mixture

A process stream with 50 mol methane (16.04 g/mol), 30 mol ethane (30.07 g/mol), 20 mol propane (44.10 g/mol)

Amount #1: 50

Molecular Weight #1: 16.04

Amount #2: 30

Molecular Weight #2: 30.07

Amount #3: 20

Molecular Weight #3: 44.1

Other Titles
Understanding Mean Molecular Weight (MME): A Comprehensive Guide
Everything you need to know about calculating the mean molecular weight of mixtures.

What is Mean Molecular Weight (MME)?

  • Definition of MME
  • Why MME Matters in Science and Health
  • Units and Measurement
Mean Molecular Weight (MME) is the weighted average of the molecular weights of all components in a mixture. It is a crucial parameter in chemistry, pharmaceuticals, nutrition, and chemical engineering.
MME in Practice
MME helps determine the properties of mixtures, such as reactivity, stability, and suitability for specific applications.

MME in Real Life

  • Calculating the MME of a sugar solution.
  • Determining the average molecular weight in a drug formulation.

Step-by-Step Guide to Using the MME Calculator

  • Input Requirements
  • Calculation Process
  • Interpreting Results
How to Use the Calculator
1. Enter the amount and molecular weight for each component in your mixture. 2. Add or remove components as needed. 3. Click 'Calculate' to get the mean molecular weight, total amount, and proportions.
The calculator ensures all values are positive and required fields are filled. Results are displayed instantly.

Step-by-Step Examples

  • A mixture of 10g glucose and 20g sucrose.
  • A supplement blend with protein, carbohydrate, and fat.

Real-World Applications of MME

  • Pharmaceuticals
  • Nutrition and Food Science
  • Chemical Engineering
Why Calculate MME?
In pharmaceuticals, MME is used to design drug formulations. In nutrition, it helps analyze supplement blends. In chemical engineering, it is vital for process calculations and mixture design.
Knowing the MME allows for better control over product quality and performance.

Applications

  • Designing a tablet with multiple active and inactive ingredients.
  • Analyzing a process stream in a chemical plant.

Common Misconceptions and Correct Methods

  • Misunderstanding Units
  • Incorrect Weighting
  • Ignoring Component Proportions
Avoiding Calculation Errors
Always use consistent units for all components. The amount can be in grams, moles, or any unit, but must be the same for all. Weight each component by its amount when calculating the mean.
Do not simply average the molecular weights; use the weighted average formula.

Common Mistakes

  • Mixing grams and moles in the same calculation (incorrect).
  • Averaging molecular weights without weighting by amount (incorrect).

Mathematical Derivation and Examples

  • The Weighted Average Formula
  • Sample Calculations
  • Interpreting the Output
The Formula
MME = (Σ(amounti × MWi)) / Σ(amounti), where MWi is the molecular weight of component i, and amount_i is its amount.
For example, for 10g of glucose (180.16 g/mol) and 20g of sucrose (342.30 g/mol): MME = (10×180.16 + 20×342.30) / (10+20) = 288.92 g/mol.

Mathematical Examples

  • Calculating MME for a binary mixture.
  • Using the formula for a three-component blend.