Unit Converter tool for chemical engineers

As a chemical engineer with 7+ years of experience working across industries like pharmaceuticals, agrochemicals, and polysilicon plants, I’ve seen firsthand how important accurate unit conversions are in day-to-day operations. Whether it’s sizing a steam line, designing a heat exchanger, or checking pump flow rates, even a small mistake in units can lead to inefficiency, safety issues, or costly downtime.

That’s why I created this unit converter tool to provide engineers, students, and plant professionals with a simple, reliable way to switch between common units without second-guessing the math.

Units are very important for chemical engineers as well and students. Here are important, useful unit conversion 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

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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)

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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

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Temperature

• K = °C + 273.15
• °C = K − 273.15
• °F = °C × 9/5 + 32
• °C = (°F − 32) × 5/9

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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

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Mass & Volume

• 1 kg = 1000 g
• 1 lb = 0.453592 kg
• 1 m³ = 1000 L = 10⁶ mL
• 1 ft³ = 0.0283168 m³

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Density

• 1 g/cm³ = 1000 kg/m³
• 1 kg/m³ = 0.062428 lb/ft³

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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

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Viscosity

• 1 Pa·s = 1000 cP
• 1 P (poise) = 0.1 Pa·s

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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

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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)