Btu

What is a British Thermal Unit?

The British Thermal Unit is a traditional energy unit used in US heating and cooling systems.

The British Thermal Unit is a traditional energy unit used in US heating and cooling systems.

A US industry standard still used to rate air conditioning equipment.

Measurement system: Imperial/US customary system (non-SI). SI equivalent: 1 Btu ≈ 1055.06 J.

British Thermal Unit facts

Unit name
British Thermal Unit
Symbol
Btu
Category
Energy
Measurement system
Imperial/US customary system (non-SI)
SI equivalent
1 Btu ≈ 1055.06 J
Common uses
Rating US air conditioning and heating equipment

Definition of the british thermal unit

The British Thermal Unit is a traditional energy unit used in US heating and cooling systems.

Measurement system and SI relationship

Imperial/US customary system (non-SI)

SI equivalent: 1 Btu ≈ 1055.06 J

History of the british thermal unit

A US industry standard still used to rate air conditioning equipment.

Where is the british thermal unit used?

Rating US air conditioning and heating equipment

British Thermal Unit conversion tools

Other languages

View the Turkish versionOpen the German version