Molecular Weight Calculator
Calculate the molecular weight (molar mass) of chemical compounds from their chemical formula.
Enter Chemical Formula
Enter a chemical formula (e.g., H2O, Ca(OH)2, C6H12O6)
Use uppercase for first letter, lowercase for second (e.g., Ca not CA)
You Might Also Like
Explore more tools in this category
Dress Size Calculator
Calculate women's dress size and convert between US, UK, EU, and AU sizing systems
Capacitance Calculator
Calculate capacitance for parallel, series, plate capacitors, and energy storage
Heat Index Calculator
Calculate heat index and apparent temperature from temperature and humidity
Rainfall Volume Calculator
Calculate water volume from rainfall for rainwater harvesting
Crop Factor Calculator
Calculate crop factor and focal length equivalents for camera sensors
Air Density Calculator
Calculate air density based on temperature, pressure, and humidity
Wind Chill Calculator
Calculate wind chill temperature based on air temperature and wind speed
Carbon Footprint Calculator
Estimate yearly carbon emissions based on travel, electricity, and food habits
Fuel Cost Calculator
Calculate fuel costs for your trips and daily commutes
Common Examples
How to Use
🔤 Element Symbols
Use proper capitalization: H, He, Li (not h, HE, li)
🔢 Numbers
Write subscripts as regular numbers: H2O, not H₂O
( ) Parentheses
Use for groups: Ca(OH)2, Al2(SO4)3
About
⚛️ Molecular Weight
Sum of atomic weights of all atoms in a molecule
📊 Units
Measured in g/mol (grams per mole)
🧪 Applications
Used in stoichiometry, concentration calculations
Supported Elements
All 118 elements from the periodic table are supported, from Hydrogen (H) to Oganesson (Og).
HHeLiBeBCNOFNeNaMgAlSiPSClArKCa...