Pro Chemical Engineering Unit Converter
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Units are very important for chemical engineers as well and students. Here are important useful unit conversions formulas
Pressure
- 1 bar = 1×10⁵ Pa
- 1 atm = 1.01325×10⁵ Pa
- 1 psi = 6 894.757 Pa
- 1 mmHg (torr) = 133.322 Pa
Length Conversion Factors
- 1 kilometer (km) – 1000 meters (m) = 0.62137 miles (mi)
- 1 meter (m) – 100 centimeters (cm)
- 1 centimeter (cm) – 0.01 meters (m) = 0.3937 inches (in)
- 1 micron (μm) – 1 × 10⁻⁶ meters (m)
- 1 inch (in) – 25.4 millimeters (mm) = 2.54 centimeters (cm) = 0.0254 meters (m)
- 1 inch (in) – 0.08333 feet (ft) = 0.02778 yards (yd) = 1.578 × 10⁻⁵ miles (mi) = 0.25 hands (hand)
- 1 foot (ft) – 30.48 centimeters (cm)
Volume Conversion Factors
- 1 liter (L) – 1000 cm³
- 1 liter (L) – 61.02 in³
- 1 liter (L) – 0.03532 ft³
- 1 cubic meter (m³) – 1000 L = 35.32 ft³
- 1 cubic foot (ft³) – 28.32 L = 0.02832 m³ = 7.481 U.S. gallons (gal)
- 1 U.S. gallon (gal) – 3.785 L = 231 in³
- 1 British gallon – 1.201 U.S. gal = 277.4 in³
- 1 cm³ – 0.061 in³
Temperature
- K = °C + 273.15
- °C = K − 273.15
- °F = °C × 9/5 + 32
- °C = (°F − 32) × 5/9
Flow rate
- 1 L/min = 0.06 m³/h
- 1 L/min = 0.264172 GPM (US)
- 1 GPM = 0.227124 m³/h
- 1 SCFM = 0.0283168 m³/min
Mass & Volume
- 1 kg = 1000 g
- 1 lb = 0.453592 kg
- 1 m³ = 1000 L = 10⁶ mL
- 1 ft³ = 0.0283168 m³
Density
- 1 g/cm³ = 1000 kg/m³
- 1 kg/m³ = 0.062428 lb/ft³
Energy & Power
- 1 kJ = 1000 J
- 1 cal = 4.184 J
- 1 kcal = 4184 J
- 1 BTU = 1055.06 J
- 1 kWh = 3.6×10⁶ J
- 1 hp = 745.7 W
Viscosity
- 1 Pa·s = 1000 cP
- 1 P (poise) = 0.1 Pa·s
Concentration
- Molarity, M = mol solute / L solution
- Molality, m = mol solute / kg solvent
- Mass % = (mass solute / mass solution) × 100
- Vol % = (vol solute / vol solution) × 100
Gas flow @ STP
- 1 Nm³ = 1 m³ (0 °C, 1 atm)
- 1 SCF = 0.0283168 Nm³
- 1 Nm³ = 35.3147 SCF
FAQ (Unit conversions Factors)
1. What is unit conversion?
Unit conversion means switching a number from one unit to another (e.g., km→mi or °C→°F) so your calculations stay accurate and everyone speaks the same “measurement language.”