Extensive experimental comparisons of calorimetric and ionometric measurements have been made that cover a broader range of electrons energies and depths in graphite than previously reported. Electron beams of 15, 20, 25, 30, 40, and 50 MeV were used. Calorimetric absorbed‐dose measurements and ionometric specific‐charge measurements in air were compared in graphite at depths from 1 to 51 g/cm2. The medium was irradiated with uncollimated electron beams produced by scattering after passing through a 0.1‐g/cm2aluminium vacuum window, various thicknesses of lead foils, and air. The variation in the quotient of the two measurements was studied as a function of lead‐foil thickness, depth in the medium, beam energy, foil‐to‐detector distance, and off‐axis distance. These studies permitted the measurements to be corrected and compared with theoretical calculations that assume a broad medium irradiated with broad, parallel, monoenergetic electron beams. The overall experimental uncertainty is estimated to be 1%. The results are generally in good agreement with theoretical and experimental results of other investigators. The calorimeter received close to 1 Mrad during preliminary measurements and from 1 to 2 Mrad during the measurements reported. The results showed no detectable heat defect in graphite after prolonged periods of exposing the calorimeter to air at atmospheric pressure.