Calculate your PC's energy use Microsoft's free Joulemeter utility gives you a rough estimate of a Windows system's power consumption. Plus: tips for reducing your electronics energy bill.

You can't always control the price of electricity, but you can control your home's energy consumption. Here's how to calculate it.

Scientists at China's State Grid Hebei Marketing Service Center have created an Internet-of-Things-based calculator to estimate feed-in and net metering tariffs for residential PV systems linked ...