Molecular Weight Calculator
Use Formula
Enter MW Directly
NMR Tube Volume Calculator
Calculate from Tube
Enter Volume Directly
Typical sample heights range from 40-50 mm depending on the spectrometer and experiment.
Concentration Calculator
Calculate from Mass
Calculate from Concentration
Recommended Concentration Ranges
- ¹H NMR: 2-20 mM (~0.5-5 mg for MW ~250)
- ¹³C NMR: 20-200 mM (~5-50 mg for MW ~250)
- ¹⁵N NMR: 100-500 mM
- ¹⁹F NMR: 5-50 mM
- ³¹P NMR: 10-100 mM
Formulas Used
- Tube Volume (mL) = π × (inner radius in cm)² × (height in cm)
- Mass (mg) = Concentration (mM) × Volume (mL) × MW (g/mol) ÷ 1000
- Mass (mg) = Concentration (mg/mL) × Volume (mL)
- Concentration (mM) = Mass (mg) ÷ (Volume (mL) × MW (g/mol)) × 1000
- Concentration (mg/mL) = Mass (mg) ÷ Volume (mL)