AC Voltage Calculator
Convert between peak, peak-to-peak, rms, and average AC voltage quantities.
Motor Calculations
Find FLA and torque for electric motors or convert between Horsepower and Watts.
Ohm's Law Calculator
Calculate the relationship between voltage, current, and resistance or the relationship between power, voltage, and current.
Power Factor Calulations
Calculate power factor for single- and three-phase circuits and find correction capacitor.
Power Triangle Calculator
Find PF, VAR, W and VA with any two known quantities or review power triangle formulas.
Test Unit Converter
Convert between common test values such as Mega to Kilo and Base to Micro.

Powerful Testing Tools. All in One Place.

With the TestGuy Pro Dashboard, you get access to our entire suite of software tools and references.

Get Premium Access

Already a subscriber? Access premium modules with your existing TestGuy Pro Account

Optimized for Mobile

No extra software to install and nothing to keep updated. All of our tools run directly in your web browser - on nearly any device!

Get Started Today

Subscription Options

With a Pro account, you get access to the best of TestGuy and lifetime updates.
  • Monthly: $11.99/mo
  • Quarterly: $9.99/mo
  • Annually: $8.88/mo