Yup,
Go to the Windows System Tray on lower-left corner of your Windows desktop; usually there it a tiny Battery icon there. You can hover over it it or on some models you can right-click or left-click to open it for detail. Hovering will show the charge percentage; some laptops also give you the time to recharge or the time unplugged; it simply depends on the model laptop you have.
Also, these little applet programs are not always reliable on that calculated time anyway; the best way to test is to unplug your laptop AC charger from the laptop and leave the laptop running 1 or more programs; watching a DVD movie from disc or connecting to a streaming website such as Netflix are ideal for draining your battery and testing your...