This is a simple, Excel-based tool for assessing and comparing costs of rotavirus vaccination programs with each rotavirus vaccine product available in the global market. It aims to help national-level policymakers specifically in countries eligible for support from Gavi, the Vaccine Alliance, compare products and estimate vaccination program costs for different rotavirus vaccines, exploring up to four different vaccine options at a time. The tool calculates cold chain volume and costs annually and for a total period of five years. Cost estimates are composed of vaccine cost (i.e., vaccine and supplies procurement and international shipping) and vaccination program costs (i.e., vaccine cost and cost of delivery). Cost estimates are provided separately for the country perspective and the combined country and Gavi perspective. A seven-minute video providing a brief tutorial on using the calculator is available in English, French, and Spanish - see links to the right.