We’re excited to launch our interactive Charity Impact Calculator, a new tool that lets you see what you get for your charitable giving. Our Impact Calculator shows you how your donation could be used to help provide services that could save the lives of some of the world’s poorest people, or help them to see again, or transform their lives in other positive ways. We highlight the work of twelve of the world’s most effective charities—and let you compare each charity’s impact side by side.