An approximate analytic formula is developed for high-energy (several BeV or higher) quasi-elastic electron scattering from a complex nucleus, on the basis of a simple nuclear model. The approximation should be good enough to be useful in estimating experimental counting rates and backgrounds. For scattering at an angle θ, the quasi-elastic peak is centered, in this approximation, at the energy ∊0=∊[1+2(∊M)×2(12θ)], where ∊ is the incident energy and M is the nucleon mass. The peak has a full width at half maximum of about 2(∊02∊)v+[1+(1+∊M)22(12θ)]12θ, where v+ is a characteristic nucleon velocity in the nucleus, v+~0.28. Inelastic electron scattering from complex nuclei is briefly discussed.