Joules to calories, BTU to kWh, and energy unit converters. Browse our free energy tools below — all calculators are instant, accurate, and require no sign-up.
CCF to Therms Converter — Convert CCF (hundred cubic feet) of natural gas to therms, BTU, MMBTU, kWh, and megajoules. Adjustable BTU content for precise utility billing.
dBm to Watts Converter — Convert dBm to watts, milliwatts, microwatts, and dBW. Bidirectional converter with Vrms for 50Ω systems and a practical reference table.
Joules to Volts Calculator — Convert joules to volts given charge in coulombs. Supports 4 modes: J+C→V, V+C→J, J+A+s, and Wh→J with comprehensive reference tables.
RMS to Watts Converter — Convert RMS voltage to watts for any impedance. Bidirectional: Vrms→W, W→Vrms, Vpeak→Vrms. Shows Vpeak, Vpp, Irms, dBm, and dBW.
Torque to Horsepower Calculator — Convert torque (N·m or ft·lb) and RPM to horsepower, kilowatts, and metric PS. Includes a torque×RPM power table for automotive reference.