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BTU to Joule

Professional BTU to J conversion.

BTU
British Thermal Unit, amount of heat needed to raise 1lb of water by 1°F.
Joule
The SI unit of work or energy, equal to the work done by a force of one newton.
Quick LinksLogic & FormulaFAQ
1055.06
Unit
  • Electronvolt
    eV
  • Attojoule
    aJ
  • Rydberg energy
    Ry
  • Hartree energy
    Eh
  • Kiloelectron-volt
    keV
  • Megaelectron-volt
    MeV
  • Nanojoule
    nJ
  • Dyne-centimeter
    dyn·cm
  • Erg
    erg
  • Microjoule
    µJ
  • Gram-force centimeter
    gf·cm
  • Millijoule
    mJ
  • Inch-ounce
    in·ozf
  • Ounce-force inch
    ozf·in
  • Gram-force meter
    gf·m
  • Poundal foot
    pdl·ft
  • Kilogram-force centimeter
    kgf·cm
  • Inch-pound
    in·lbf
  • Pound-force inch
    lbf·in
  • Joule
    J
  • Newton-meter
    N·m
  • Watt-second
    W·s
  • Foot-pound
    ft·lbf
  • Pound-force foot
    lbf·ft
  • Calorie
    cal
  • Calorie (th)
    cal (th)
  • Calorie (IT)
    cal (IT)
  • Kilogram-force meter
    kgf·m
  • Kilopond meter
    kp·m
  • Kilojoule
    kJ
  • Kilowatt-second
    kW·s
  • BTU (th)
    Btu (th)
  • BTU (IT)
    Btu (IT)
  • BTU
    BTU
  • Watt-hour
    Wh
  • Food Calorie
    Cal
  • Kilocalorie
    kcal
  • Kilocalorie (th)
    kcal (th)
  • Calorie (nutritional, IT)
    Cal
  • Kilocalorie (IT)
    kcal (IT)
  • Megajoule
    MJ
  • Horsepower (Metric) hour
    PS·h
  • Horsepower hour
    hp·h
  • Kilowatt-hour
    kWh
  • Ton-hour (refrigeration)
    TR·h
  • Therm (US)
    therm (US)
  • Therm
    therm
  • Therm (EC)
    therm (EC)
  • Gigajoule
    GJ
  • Mega BTU (IT)
    MBtu (IT)
  • Megawatt-hour
    MWh
  • Ton (TNT)
    ton TNT
  • Fuel oil equivalent (barrel US)
    FOE/bbl
  • Fuel oil equivalent (kiloliter)
    FOE/kL
  • Gigawatt-hour
    GWh
  • Kiloton (TNT)
    kton
  • Megaton (TNT)
    Mton
  • Gigaton (TNT)
    Gton
Unit
  • Electronvolt
    eV
  • Attojoule
    aJ
  • Rydberg energy
    Ry
  • Hartree energy
    Eh
  • Kiloelectron-volt
    keV
  • Megaelectron-volt
    MeV
  • Nanojoule
    nJ
  • Dyne-centimeter
    dyn·cm
  • Erg
    erg
  • Microjoule
    µJ
  • Gram-force centimeter
    gf·cm
  • Millijoule
    mJ
  • Inch-ounce
    in·ozf
  • Ounce-force inch
    ozf·in
  • Gram-force meter
    gf·m
  • Poundal foot
    pdl·ft
  • Kilogram-force centimeter
    kgf·cm
  • Inch-pound
    in·lbf
  • Pound-force inch
    lbf·in
  • Joule
    J
  • Newton-meter
    N·m
  • Watt-second
    W·s
  • Foot-pound
    ft·lbf
  • Pound-force foot
    lbf·ft
  • Calorie
    cal
  • Calorie (th)
    cal (th)
  • Calorie (IT)
    cal (IT)
  • Kilogram-force meter
    kgf·m
  • Kilopond meter
    kp·m
  • Kilojoule
    kJ
  • Kilowatt-second
    kW·s
  • BTU (th)
    Btu (th)
  • BTU (IT)
    Btu (IT)
  • BTU
    BTU
  • Watt-hour
    Wh
  • Food Calorie
    Cal
  • Kilocalorie
    kcal
  • Kilocalorie (th)
    kcal (th)
  • Calorie (nutritional, IT)
    Cal
  • Kilocalorie (IT)
    kcal (IT)
  • Megajoule
    MJ
  • Horsepower (Metric) hour
    PS·h
  • Horsepower hour
    hp·h
  • Kilowatt-hour
    kWh
  • Ton-hour (refrigeration)
    TR·h
  • Therm (US)
    therm (US)
  • Therm
    therm
  • Therm (EC)
    therm (EC)
  • Gigajoule
    GJ
  • Mega BTU (IT)
    MBtu (IT)
  • Megawatt-hour
    MWh
  • Ton (TNT)
    ton TNT
  • Fuel oil equivalent (barrel US)
    FOE/bbl
  • Fuel oil equivalent (kiloliter)
    FOE/kL
  • Gigawatt-hour
    GWh
  • Kiloton (TNT)
    kton
  • Megaton (TNT)
    Mton
  • Gigaton (TNT)
    Gton
Precision: 8 decimal places

Logic & Formula

To convert BTU to Joule, we use the specific conversion ratio for this category. 1 BTU is equal to 1055.06 J.

Value in J = (Value in BTU * 1055.06) / 1

Unit Definitions

BTU

British Thermal Unit, amount of heat needed to raise 1lb of water by 1°F.

Joule

The SI unit of work or energy, equal to the work done by a force of one newton.

Verified 2026 Standards
Industrial Precision

How to convert BTU to Joule?

Enter the value in BTU, choose the target unit Joule, and the result updates instantly. This page also includes the conversion formula and a quick reference table for verification.

Formula: Value in J = Value in BTU × 1055.06

Common Conversions Table

Value (BTU)Result (J)
11055.06
1010550.6
2526376.5
5052753
100105506
10001055060

FAQ

What is the conversion formula from BTU to J?
Value in J = Value in BTU × 1055.06
What is the smallest unit in Energy?
The smallest unit (as defined on this site) is: Electronvolt (eV). For higher precision, convert using a smaller unit first.
Are the results accurate?
Yes. Conversions run locally in your browser using verified ratios and display up to 8 decimals. Some categories like temperature and fuel use specialized formulas.

About this conversion

This page converts BTU to Joule using verified ratios and includes tables, examples, and FAQs for quick verification.

BTU
British Thermal Unit, amount of heat needed to raise 1lb of water by 1°F.
Joule
The SI unit of work or energy, equal to the work done by a force of one newton.

Formula and precision

Value in J = Value in BTU × 1055.06
1 BTU is equal to 1055.06 J.
Yes. Conversions run locally in your browser using verified ratios and display up to 8 decimals. Some categories like temperature and fuel use specialized formulas.
  • Use smaller units for higher precision, then convert back if needed.
  • Temperature and fuel categories can’t be reduced to one constant multiplier.
  • Symbols vary by region (US/UK gallons, metric vs. imperial abbreviations).
  • For engineering work, validate with a second reference and keep unit symbols.

Quick examples

Example: 1 BTU = 1055.06 J.

Value (BTU)Result (J)
11055.06
12.513188.25
5052753
100105506

Common mistakes and definitions

  • Rounding too early (convert first, then round at the end).
  • Mixing similar-looking symbols (for example, “m” vs “mm”, or “b” vs “B”).
  • Copying values without the unit symbol, which makes validation harder.

Common Conversions Table

BTU (BTU)Joule (J)
11055.06
22110.12
33165.18
55275.3
1010550.6
2526376.5
5052753
100105506
250263765
500527530
10001055060

Category facts

Smallest unit (on this site)
Electronvolt (eV)
Largest unit (on this site)
Gigaton (TNT) (Gton)

Popular conversions

Back to Energy category Browse more related converters below.

BTU → JouleJoule → Kilowatt-hourKilojoule → KilocalorieCalorie → JouleJoule → ElectronvoltJoule → Gram-force meterJoule → KilojouleJoule → Gigaton (TNT)

Related conversions

Convert BTU to:
BTU (IT)BTU (th)KilojouleKilowatt-secondWatt-hourKilocalorieFood CalorieKilocalorie (th)
Convert to Joule from:
Watt-secondNewton-meterPound-force footFoot-poundCalorie (th)Calorie (IT)Pound-force inchInch-pound

FAQ

How to convert BTU to Joule?
Enter the value in BTU, choose the target unit Joule, and the result updates instantly. This page also includes the conversion formula and a quick reference table for verification.
What is the conversion formula from BTU to J?
Value in J = Value in BTU × 1055.06
What is the smallest unit in Energy?
The smallest unit (as defined on this site) is: Electronvolt (eV). For higher precision, convert using a smaller unit first.
Why can results differ between websites?
Different standards, rounding rules, and unit definitions can change results. This page shows the formula used for transparency.
Are the results accurate?
Yes. Conversions run locally in your browser using verified ratios and display up to 8 decimals. Some categories like temperature and fuel use specialized formulas.

More Related Energy Tools

Back to Energy category
Convert to KilojouleConvert to CalorieConvert to KilocalorieConvert to Food CalorieConvert to Watt-hourConvert to Kilowatt-hourConvert to BTUConvert to ElectronvoltConvert to ErgConvert to GigajouleConvert to MegajouleConvert to Millijoule

People also convert

Joule → Kilowatt hourKilojoule → KilocalorieCalorie → JouleBTU → Joule

Did you know?

Convert between Joules, Calories, BTU, and Watt-hours. Precision is the cornerstone of our platform. We utilize 15-digit floating-point arithmetic to ensure results meet 2026 industrial and academic verification standards. Looking for other types of calculations? Explore our Main Dashboard for 100,000+ precision permutations.