Electrical · HVAC · Automation
Calculate.
Understand.
From lighting to motor current, start your technical calculation here. Enter your values, see the result, and check the formula and worked example.
Try: motor current, lighting, water flow
Values are examples. Enter your equipment and application data.
Work areas
Where shall we start?
Find the tools and explanations for your task.
Electrical
Power, motor current and cable calculations. Start by separating input power from shaft output.
kW · Amps · Voltage drop02↗HVAC & systems
Check the relationship between flow, temperature difference and power in air and water systems.
Flow · Fan · Pump · ΔT03↗Automation & BMS
Scale analog signals and check sensor values and communication addresses.
4–20 mA · Modbus · BACnetToolbox
Get straight to the calculation.
Technical notes
From result to application.
Why doesn’t a 15 kW motor draw 25 A?
Explore shaft power, input power and the effect of efficiency on current.
Start reading →You measured 12 mA. What does it mean?
Check the sensor range and three reference points; distinguish zero current from process zero.
Start reading →When a Modbus device does not respond
Separate timeout, exception replies and incorrect values to choose your next check.
Start reading →At your desk
Units, formulas and checklists.
Choose the right unit before calculating and the right checks before applying.