Calories to Electron Volts Converter

How to convert Calories to Electron Volts

To convert Calories to Electron Volts, multiply the value in Calories by 2.611735e+19. For example, 5 cal = 1.305868e+20 eV.

The Calories-to-Electron Volts conversion comes up often in everyday and professional contexts alike. With 1 cal equal to 2.611735e+19 eV, you can use the tool above for any value, or scan the table below for the most common Calories amounts and their Electron Volts equivalents.

Energy conversions appear in nutrition, fitness, physics, utility bills, and engineering. The same quantity of energy can be expressed in joules, calories, kilowatt-hours, or BTU depending on the context.

Understanding Calories and Electron Volts

The joule is the SI unit, but everyday contexts use others: food labels use kilocalories (often just called 'calories'), electricity bills use kilowatt-hours, and heating and cooling systems use BTU (British Thermal Units). One food calorie is actually a kilocalorie — 1,000 of the small physics calories — which is a frequent source of confusion.

How accurate is this conversion?

Energy conversions use standard definitions: 1 calorie = 4.184 joules, 1 kilowatt-hour = 3,600,000 joules, 1 BTU = 1,055.06 joules. These are internationally agreed values, making the conversions exact.

All conversion factors on ClearUnits are based on internationally recognised standards (the International System of Units, SI, and official definitions). Factors are reviewed for accuracy and the calculator uses full-precision values, rounding only the displayed result.

Quick reference: common Calories to Electron Volts values

The most frequently searched conversions are 1 Calories = 2.611735e+19 Electron Volts, 5 Calories = 1.305868e+20 Electron Volts, 10 Calories = 2.611735e+20 Electron Volts, and 100 Calories = 2.611735e+21 Electron Volts. The full table further down covers every common value, and the calculator handles any number you need in between.