Energy converter (joules, calories, kWh, BTU)
Energy: enter value + source unit. Base = joule (J).
About this tool
Energy converter (joules, calories, kWh, BTU) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Unit Converters. Browse more Unit Converters tools.