Common conversions include:

• Volume Flow: Volume flow: between l/s, m³/h and l/h, especially in ventilation and water flow design
• Power: Power: between W and kcal/h, especially in heating systems
• Pressure: Pressure: between Pa, kPa, MPa, mmHg, psi and mH₂O, in various system pressure designs
• Temperature: Temperature: between Celsius and Fahrenheit degrees in international projects
• Length: Length: between mm, cm, m, inch and foot, especially in pipe sizing
• Mass: Mass: between g, kg and lb, in equipment selection and load calculations