Calculator
BTU Converter
Convert between common energy units instantly.
Interactive toolUpdated July 2026
Input
Converted Values
J1000.000
MJ0.001000
kWh2.778e-4
BTU0.947817
therm9.478e-6
kcal0.239006
About
Conversion factors are referenced to a base unit for each category (Energy → base kJ). Values are rounded for display; the underlying calculation uses full precision.