Skip to main content

Polymer Molecular Weight (Mn, Mw) & Polydispersity (PDI) Calculator

Easily calculate and compute polymer molecular weight (mn, mw) & polydispersity (pdi) calculator with accurate equations, live formulas, and expert guidance.

Total moles of polymer molecules in sample.

Total sample mass in grams.

Weight-weighted square moment from GPC/SEC.

Calculated Result
1.5 ratio

Polydispersity Index (PDI)

Polydispersity Index (PDI)

1.5 ratio

Pdi

1.5

Mn G Per Mol

50000

Mw G Per Mol

75000

Total Moles N

1.5

1.5 — ratio

Calculation Breakdown

  1. Applied FormulaCalculates number-average molecular weight (Mn), weight-average molecular weight (Mw), and polydispersity index (PDI) from polymer chain distribution moments.PDI = \frac{M_w}{M_n}

Polymer Mn, Mw & PDI Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.40.81.11.5Polydispersity Index (PDI)

What Is the Polymer Molecular Weight (Mn, Mw) & Polydispersity (PDI) Calculator?

This tool computes polymer molecular weight (mn, mw) & polydispersity (pdi) calculator with high precision arithmetic.

How Does the Polymer Molecular Weight (Mn, Mw) & Polydispersity (PDI) Calculator Work?

Calculates number-average molecular weight (Mn), weight-average molecular weight (Mw), and polydispersity index (PDI) from polymer chain distribution moments.

Polymer Molecular Weight (Mn, Mw) & Polydispersity (PDI) Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

PDI=MwMnPDI = \frac{M_w}{M_n}

Calculates number-average molecular weight (Mn), weight-average molecular weight (Mw), and polydispersity index (PDI) from polymer chain distribution moments.

How to Use the Polymer Molecular Weight (Mn, Mw) & Polydispersity (PDI) Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Polymer Molecular Weight (Mn, Mw) & Polydispersity (PDI) Calculator Example

Input Values:

totalMolesN:1.5
firstMomentMassG:75000
secondMomentMassG2:5625000000
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required ratio.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

\n

Explore more tools and calculators in Chemistry Calculators