The estimated number of stars characterized by SPHEREx as a function of spectral type. The dark blue triangle line represents the number of stars of a given spectral type expected to achieve an SNR ≥ 5 in any of its 102 channels. The purple square line shows the number of stars expected to reach an SNR ≥ 50. The lines below show the same SNR threshold, but with 100, 30, and 15 pc distance cuts applied. SPHEREx will measure the spectra of ∼10⁶ M5–M9 dwarfs with SNR ≥ 50 and tens of thousands of brown dwarfs, thousands of which are near enough for detailed characterization.