This article introduces ReCal OIR, an extension to the existing ReCal suite of online intercoder reliability modules that accommodates ordinal, interval, and ratio levels of measurement. It includes a discussion of the currently available options for calculating reliability for the ordinal, interval, and ratio levels; explains what ReCal OIR does; validates its calculations; and discusses its usage data. The process of validating its output reveals ReCal OIR to be slightly more accurate than one of its major competitors.