Conversor de energía

Convierta kWh a BTU, calorías a julios, kcal a kJ y therms a kWh con las definiciones exactas del julio, la caloría, el BTU y el electronvoltio.

Actualizado Ejemplos verificados: 4

Un número en la unidad de origen, o acompañado de su propia unidad
Probar
Valor convertido
BTU
Valor convertido: 3,412.14163313 BTU
Cifras significativas: 12; Al más cercano; empates alejándose de cero
Conversión
1 kWh ≈ 3,412.142 BTU
Factor de conversión
3,412.14163313
Exactitud
Definiciones exactas, decimal periódico

1 kWh equivale aproximadamente a 3,412.142 BTU.

La misma cantidad expresada en cada unidad

kWh1 kWhBTU3,412.142 BTU
1 kWh en cada unidad de Energía Filas: 14
UnidadValorDefinición
joule (J)3,600,000Unidad base
kilojulio (kJ)3,6001 kJ = 1,000 J, exacto
megajoule (MJ)3.61 MJ = 1,000,000 J, exacto
watt-hour (Wh)1,0001 Wh = 3,600 J, exacto
kilowatt-hour (kWh)11 kWh = 3,600,000 J, exacto
megawatt-hour (MWh)0.0011 MWh = 3,600,000,000 J, exacto
calorie (cal)860,420.71 cal = 4.184 J, exacto (Caloría termoquímica)
kilocaloría (kcal)860.42071 kcal = 4,184 J, exacto
British thermal unit (BTU)3,412.1421 BTU = 1,055.05585262 J, exacto
therm (US) (thm)0.034129561 thm = 105,480,400 J, exacto
electronvolt (eV)2.246943 × 10²⁵1 eV = 1.602176634 × 10⁻¹⁹ J, exacto
erg36,000,000,000,0001 erg = 1 × 10⁻⁷ J, exacto
foot-pound (ft·lbf)2,655,2241 ft·lbf = 1.3558179483314004 J, exacto
tonne of oil equivalent (toe)0.000085984521 toe = 41,868,000,000 J, exacto
Cómo se calcula S
  1. Convertir kilowatt-hour a joule

    1 kWh×3,600,000 JkWh=3,600,000 J1\ \text{kWh} \times 3{,}600{,}000\ \tfrac{\text{J}}{\text{kWh}} = 3{,}600{,}000\ \text{J}

    1 kWh = 3,600,000 J, exacto

  2. Convertir joule a British thermal unit

    3,600,000 J÷1,055.05585262 JBTU=3,412.14163313 BTU3{,}600{,}000\ \text{J} \div 1{,}055.05585262\ \tfrac{\text{J}}{\text{BTU}} = 3{,}412.14163313\ \text{BTU}

    1 BTU = 1,055.05585262 J, exacto

  3. Factor combinado

    1 kWh=3,600,0001,055.05585262 BTU≈3,412.14163313 BTU1\ \text{kWh} = \frac{3{,}600{,}000}{1{,}055.05585262}\ \text{BTU} \approx 3{,}412.14163313\ \text{BTU}

    Ambas unidades tienen definiciones exactas, pero el valor convertido es un decimal periódico; se muestra con 12 cifras significativas.

Acerca de Conversor de energía

Every energy unit is a fixed number of joules. A kilowatt-hour is exactly 3.6 MJ (1,000 W for 3,600 s), the thermochemical calorie is 4.184 J, and the International Table British thermal unit is 1,055.05585262 J (NIST SP 811), so each factor is a definition rather than a measurement.

The default converts 1 kWh to 3,412.14 BTU, the link between electricity bills and heating or air-conditioning ratings. Food energy is the other everyday use: a food Calorie is a kilocalorie, so a 2,000 kcal day is 8,368 kJ.

Some units share a name but not a size. The International Table calorie (4.1868 J) is 0.07% larger than the thermochemical one used here, and the US therm (105,480,400 J) is defined with the 59 °F BTU, so it comes to 99,976 International Table BTU rather than 100,000.

Ejemplos resueltos

1 kWh in BTU

Valor
1 kWh
De
kilowatt-hour (kWh)
A
British thermal unit (BTU)
Valor convertido
3,412.14163313 BTU

Fuente de comprobación: 3,600,000 J ÷ 1055.05585262 J (International Table BTU, NIST SP 811 App. B) (Python 3.8 fractions from the legal definitions)

1 kcal in kJ

Valor
1 kcal
De
kilocalorie (kcal)
A
kilojoule (kJ)
Valor convertido
4.184 kJ
Exactitud
Exacto

Fuente de comprobación: Thermochemical calorie = 4.184 J exactly (NIST SP 811 App. B)

1 eV in joules

Valor
1 eV
De
electronvolt (eV)
A
joule (J)
Valor convertido
1.602176634 × 10⁻¹⁹ J

Fuente de comprobación: e = 1.602176634 × 10⁻¹⁹ C exactly (SI 2019), so 1 eV = 1.602176634 × 10⁻¹⁹ J

1 US therm in BTU

Valor
1 thm
De
therm (US) (thm)
A
British thermal unit (BTU)
Valor convertido
99,976.1289775 BTU

Fuente de comprobación: 105,480,400 J (NIST SP 811 App. B) ÷ 1055.05585262 J (Python 3.8 fractions from the legal definitions)

Preguntas

How many BTU are in a kWh?

3,412.14 BTU. A kWh is 3,600,000 J and the International Table BTU is 1,055.05585262 J, so 3,600,000 ÷ 1,055.05585262 = 3,412.1416. In the other direction 1 BTU is 0.000293071 kWh, so 100,000 BTU of heat is 29.31 kWh.

How many joules are in a calorie?

4.184 J for the thermochemical calorie used here, or 4.1868 J for the International Table calorie; NIST SP 811 lists both. Nutrition labels count kilocalories, often printed as “Calories”, so one food Calorie is 4,184 J or 4.184 kJ. EU food labels give energy in both kJ and kcal.

What is a unit of electricity?

One kilowatt-hour, 3.6 MJ: the energy a 1,000 W appliance uses in one hour. Electricity bills in the UK and India count “units” in kWh, so a 2 kW heater running for 3 hours uses 6 units, and a 10 W LED bulb takes 100 hours to use one.

What is the difference between kW and kWh?

A kilowatt measures power, the rate at which energy is used; a kilowatt-hour measures the energy itself, power multiplied by time. A 3 kW kettle running for 4 minutes uses 3 × 4/60 = 0.2 kWh. Convert kW with the power converter and kWh with this one.

How many kWh are in a therm?

29.3 kWh. The US therm is 105,480,400 J (NIST SP 811), which is 29.3001 kWh; the EU and UK therm, 100,000 International Table BTU or 105,505,585.262 J, is 29.3071 kWh. The two differ by 0.024%, so either rounds to 29.3 kWh.

¿Qué precisión tiene «Conversor de energía»?

La precisión depende de tus datos y de los supuestos del método. El cálculo decimal usa 50 cifras significativas, pero las estimaciones, los métodos numéricos y los datos de origen pueden ser menos precisos; el redondeo mostrado no elimina esos límites. Ejemplos resueltos comprobados con fuentes independientes: 4. Por ejemplo, «1 kWh in BTU» se comprueba con 3,600,000 J ÷ 1055.05585262 J (International Table BTU, NIST SP 811 App. B) (Python 3.8 fractions from the legal definitions).

¿De dónde procede el método?

NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors; NIST Handbook 44, Appendix C — General tables of units of measurement.

Acerca de esta calculadora

xto=xfrom×ffromftof=one unit expressed in J\begin{gathered} x_{\text{to}} = x_{\text{from}} \times \dfrac{f_{\text{from}}}{f_{\text{to}}} \\ f = \text{one unit expressed in } \text{J} \end{gathered}

Fuentes

  1. NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors
  2. NIST Handbook 44, Appendix C — General tables of units of measurement

Verificado con las referencias

Esta calculadora incluye 4 ejemplos resueltos con respuestas de fuentes independientes. Forman parte del conjunto de pruebas y también puedes ejecutarlos aquí.

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