Calculators
Calculators for the everyday maths of controls work. Each one shows its formula and a worked example.
Electrical
- Voltage Drop and Wire Gauge CalculatorCheck a cable run and find the smallest AWG size that works.
- Ohm's Law and AC Power CalculatorSolve V, I, R and P from any two, plus kVA, kW and power factor.
- Motor Full-Load Current CalculatorNEC full-load current table lookup and a current estimate from kW or hp.
- 24 VDC Power Supply Sizing CalculatorAdd up your 24 V loads and pick a power supply with margin for growth.
Instrumentation
- 4-20 mA and 0-10 V Scaling CalculatorScale 4-20 mA, 0-10 V and other analog signals to a process value and back.
- PLC Analog Scaling CalculatorScale raw analog counts to engineering units, with gain and offset.
- RTD Resistance to Temperature Calculator (PT100, PT1000)PT100 and PT1000 resistance to temperature, and back.
- Control Valve Cv Sizing CalculatorRequired Cv for a liquid flow, or flow from a known Cv.
Motion and mechanical
- Encoder Counts and Resolution CalculatorCounts per revolution, per inch or millimeter, and count rate.
- Gear Ratio, Torque and Speed CalculatorOutput speed, torque and power through a gearbox.
- Motor Synchronous Speed and Slip CalculatorSynchronous speed, slip and the drive frequency for a target RPM.
- Conveyor Belt Speed CalculatorBelt speed from roller size, motor RPM and gear ratio, or the reverse.
- Air Cylinder Force and Air Consumption CalculatorExtend and retract force and air consumption for a pneumatic cylinder.