g/mol to kDa Calculator

Convert molecular weight from grams per mole (g/mol) to kilodaltons (kDa). Essential calculator for biochemistry, molecular biology, and pharmaceutical research.

Molecular Biology Tool:

Convert between molecular weight units with scientific precision. Perfect for protein analysis, enzyme studies, and pharmaceutical calculations.

Molecular Weight Converter

Conversion Direction

Molecular weight value to convert

Molecular Weight Results

Enter molecular weight and click Convert

Convert Molecular Weight

In chemistry and biology, molecular weight is often written in grams per mole (g/mol). However, when working with proteins, enzymes, or large biomolecules, scientists usually prefer kilodaltons (kDa). A g/mol to kDa Calculator makes this conversion instant and error-free.

This calculator is useful for protein analysis, enzyme studies, pharmaceutical research, and molecular biology education.

What g/mol and kDa Mean

These are complementary ways to express molecular mass:

  • g/mol (grams per mole): The mass of one mole of a substance
  • kDa (kilodalton): A scaled unit where 1 kDa = 1000 Da = 1000 g/mol

The conversion is straightforward since 1 dalton is approximately equal to 1 g/mol.

Formula Used

The calculator uses a simple and reliable formula:

kDa Conversion:
kDa = g/mol ÷ 1000
Reverse Calculation:
g/mol = kDa × 1000

This relationship holds true across all molecular weight ranges.

Common Molecular Weight Examples

Here are molecular weights for common biomolecules and their kDa equivalents:

Molecule g/mol kDa Category
Water 18 0.018 Small molecule
Glucose 180 0.18 Carbohydrate
Amino Acid (avg) 137 0.137 Building block
Insulin 5808 5.8 Hormone
Cytochrome C 12384 12.4 Electron carrier
Myoglobin 16951 17.0 Oxygen carrier
Hemoglobin 64500 64.5 Blood protein
Albumin 66463 66.5 Blood protein
Immunoglobulin G 150000 150 Antibody
Collagen 300000 300 Structural protein
Fibrinogen 340000 340 Blood clotting
DNA Polymerase 400000 400 Replication enzyme
Ribosome (70S) 2500000 2500 Protein synthesis
Adenovirus 25000000 25000 Virus
E. coli Chromosome 4600000000 4600000 Bacterial genome
Human Chromosome 140000000000 140000000 Human genome
ATP Synthase 550000 550 Energy enzyme
Actin Filament 42000000 42000 Cytoskeleton
Titin 3000000 3000 Muscle protein
Amyloid Fibril 100000000 100000 Protein aggregate
Transferrin 79500 79.5 Iron transport
Catalase 240000 240 Antioxidant enzyme

When This Calculator Is Useful

  • Protein analysis - converting molecular weights for enzyme and protein studies
  • Biology exams - quick unit conversions for assignments and tests
  • Lab reports - ensuring consistent units in research documentation
  • Pharmaceutical calculations - drug molecular weight conversions
  • Educational reference - learning molecular weight relationships
Molecular Biology Note:

Molecular weight units reflect the scale of biological molecules. Small molecules use g/mol, while large biomolecules like proteins and DNA are measured in kDa for practical communication.