AC Voltage CalculatorConvert between peak, peak-to-peak, rms, and average AC voltage quantities.
AI Chat BotBETA Module. TestGuy GPT Open AI model trained on electrical testing and engineering topics.
Motor CalculationsFind FLA and torque for electric motors or convert between Horsepower and Watts.
Ohm's Law CalculatorCalculate the relationship between voltage, current, and resistance or the relationship between power, voltage, and current.
Power Factor CalulationsCalculate power factor for single- and three-phase circuits and find correction capacitor.
Power Triangle CalculatorFind PF, VAR, W and VA with any two known quantities or review power triangle formulas.
Test Unit ConverterConvert between common test values such as Mega to Kilo and Base to Micro.
Need something else? Explore
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
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