电热（英语：Electric heating）或电加热，是指将电能转换为热能的方式。常见的应用包括有空间加热、烹饪、热水器与工业生产上。辐射加热器是利用电产生辐射能后对人或物体加热。

每种电热设备的内部都有简单的加热组件，它根据焦耳加热原理在工作：电流流经电阻器时会产生热。现代的电热设备使用镍铬合金线作为主动组件，合适的加热组件材料是采用耐热、耐火、电绝缘性佳的陶瓷来支撑镍铬合金线。

热泵是利用电动马达驱动冷冻循环(制冷循环)的高性能电加热器。热泵能从来源提取能量，例如地面或外部空气，并引导它进入一个内部空间加热。某些热泵系统还可以颠倒，将热空气被排到地面或外部，而使内部空间冷却。热泵可以提供三或四的性能系数（COP），然而这与设备的性能，及室内室外的温差有关。

Electric heating is any process in which electrical energy is converted to heat. Common applications include space heating, cooking, water heating and industrial processes. An electric heater is an electrical device that converts electric current to heat. The heating element inside every electric heater is an electrical resistor, and works on the principle of Joule heating: an electric current passing through a resistor will convert that electrical energy into heat energy. Most modern electric heating devices use nichrome wire as the active element; the heating element, depicted on the right, uses nichrome wire supported by ceramic insulators.