SURFace algorithms are programs that calculate solvent accessible surface area and curvature-corrected solvent accessible surface area. The accessible surface output is calculated for the whole molecule, per residue, and per atom. SURFV calculates solvent accessible area which is defined by a probe as it rolls on the surface of the molecule. Thus use of a zero radius probe will give the Van der Waals surface area. SURFCV calculates solvent accessible area and an average curvature.