Chemistry Unit Converter

Convert between common chemistry units - Mass, Volume, Pressure, Temperature, Energy, and Concentration

Mass Converter
Quick Examples:
5.5 g → mg 250 mg → g 2.5 kg → g 500 μg → mg 1 lb → g
Volume Converter
Quick Examples:
2.5 L → mL 750 mL → L 100 μL → mL 1 gal → L 500 mL → fl oz
Pressure Converter
Quick Examples:
1 atm → Pa 760 mmHg → atm 101.325 kPa → psi 1 bar → atm 14.7 psi → kPa
Temperature Converter
Quick Examples:
25°C → K 298 K → °C 100°C → °F 32°F → °C 0°C → K 273.15 K → °C
Energy Converter
Quick Examples:
1000 J → kJ 4.184 kJ → kcal 100 cal → J 1 eV → J 1 kWh → kJ
Concentration Converter

Note: For ppm/ppb/% conversions, assumes aqueous solutions (density ≈ 1 g/mL)

Quick Examples:
1 M → mM 500 mM → M 100 μM → mM 50 ppm → mg/L 1000 ppb → μg/L
Common Conversion Factors
Mass
  • 1 kg = 1000 g
  • 1 g = 1000 mg
  • 1 mg = 1000 μg
  • 1 lb = 453.592 g
  • 1 oz = 28.3495 g
Volume
  • 1 L = 1000 mL
  • 1 mL = 1000 μL = 1 cm³
  • 1 gal = 3.78541 L
  • 1 fl oz = 29.5735 mL
Temperature
  • K = °C + 273.15
  • °F = (°C × 9/5) + 32
  • °C = (°F - 32) × 5/9
Pressure
  • 1 atm = 101325 Pa
  • 1 atm = 760 mmHg = 760 torr
  • 1 bar = 100000 Pa
  • 1 psi = 6894.76 Pa
Energy
  • 1 kJ = 1000 J
  • 1 cal = 4.184 J
  • 1 kcal = 4184 J
  • 1 eV = 1.602×10⁻¹⁹ J
  • 1 kWh = 3.6×10⁶ J
Concentration
  • 1 M = 1000 mM
  • 1 mM = 1000 μM
  • 1 ppm = 1 mg/L (aqueous)
  • 1 ppb = 1 μg/L (aqueous)

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