Molecular Weight Calculator
Calculate molecular weight and molar mass of chemical compounds
Molecular Weight Calculator
Calculate molecular weight and molar mass of chemical compounds
Enter a chemical formula with proper element symbols and subscripts
Molecular Weight
18.016 Da
Molecular Formula
Same as empirical
Element Composition
| Element | Count | Mass (g/mol) | Percentage |
|---|---|---|---|
| H (Hydrogen) | 2 | 2.016 | 11.19% |
| O (Oxygen) | 1 | 16.000 | 88.81% |
Mass to Moles
1 g = 0.055506 mol
100 g = 5.5506 mol
Moles to Mass
1 mol = 18.016 g
0.1 mol = 1.802 g
Additional Properties
Related Calculators
How to Use
- 1Enter your values in the input fields
- 2Review the calculated results
- 3Use the results for your planning
📚 Table of Contents
1Complete Guide to Molecular Weight
Calculate molecular weight and molar mass of chemical compounds. This comprehensive guide will help you understand all aspects of molecular weight and how to use it effectively for your specific needs. Whether you're using this for personal, professional, or educational purposes, you'll find valuable insights and practical tips.
Getting Started
Understanding the basics ensures accurate results: • Input requirements and formats • Common use cases and scenarios • Interpreting output values • Troubleshooting common issues • Best practices for accuracy
Advanced Features
Maximize the calculator's potential: • Multiple calculation modes • Customization options • Saving and comparing results • Integration with other tools • Professional applications
2Tips and Best Practices
Get the most value from your calculations with these expert tips and strategies.
Accuracy and Precision
Ensure reliable results: 1. Double-check input values 2. Use appropriate units 3. Consider significant figures 4. Account for real-world variables 5. Verify with alternative methods when possible
Common Applications
This calculator helps with: • Planning and estimation • Comparison and analysis • Decision making • Problem solving • Educational purposes • Professional requirements
🔗 Related Resources
This comprehensive guide is regularly updated to ensure accuracy. Last reviewed: 7/25/2025
Frequently Asked Questions
What is molecular weight?
Molecular weight (or molar mass) is the mass of one mole of a substance, expressed in grams per mole (g/mol).
How do I calculate molecular weight?
Add up the atomic weights of all atoms in the molecule. For example, H2O = 2(1.008) + 16.00 = 18.016 g/mol.