MJ/K
megajoule per kelvin
Heat capacityexact by definition
The megajoule per kelvin is 10⁶ J/K. It is the unit of building thermal mass: a concrete slab of 100 m² and 200 mm thickness stores roughly 100 MJ/K, which is what makes a heavy building coast through a night without heating.
| 1 MJ/K | 1,000,000 J/K |