In mathematics, curvature is any of several strongly related concepts in geometry that intuitively measure the amount by which a curve deviates from being a straight line or by which a surface deviates from being a plane. If a curve or surface is contained in a larger space, curvature can be defined extrinsically relative to the ambient space. Curvature of Riemannian manifolds of dimension at least two can be defined intrinsically without reference to a larger space.

गणित में वक्रता (curvature) के कई अर्थ हैं जो मोटे तौर पर आपस में सम्बन्धित भी हैं। किसी समतल में स्थित किसी वक्र के किसी बिन्दु पर उस वक्र की वक्रता निम्न प्रकार से परिभाषित की जाती है -