Convert BTU (IT) (btu) to Joule (J) (j)
Category: Energy
1000 btu = 1055055.85262 j
High-precision rounding: 6 decimals
How to convert btu (it) to joule (j)
We convert by pivoting through the SI base unit for Energy and applying exact factors where applicable.
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Quick conversion table
Handy values for BTU (IT) → Joule (J). Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Confusing calorie (cal) with kilocalorie (kcal) on nutrition labels.
- Treating BTU definitions interchangeably without noting standard (IT vs other).
Unit facts
- BTU (IT): British thermal unit (BTU IT) ≈ 1,055.06 J; common in HVAC ratings.
- Joule (J): Joule (J) is the SI unit of energy: 1 J = 1 N·m = 1 kg·m²/s².
About Energy
Energy is the capacity to do work. Joules form the SI base; Wh/kWh align with metering and batteries; calories and BTU survive in nutrition and HVAC. Conversions bridge mechanical, thermal, and electrical perspectives.
About BTU (IT)
British thermal unit (BTU)
≈1,055.06 J (IT). Common in HVAC sizing and fuel energy content (per lb or per ft³).
History: Industrial steam era popularized BTU; persists for practical North American engineering.
About Joule (J)
Joule (J)
SI energy unit equal to N·m. Fundamental in physics, electronics (J = W·s), and thermodynamics.
History: Named after James P. Joule. Became universal with SI coherence across mechanical and electrical domains.
Related conversions from btu
- btu → cal Calorie (cal)
- btu → kcal Kilocalorie (kcal)
- btu → kwh Kilowatt-hour (kWh)
- btu → wh Watt-hour (Wh)