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Btus (th)/pound/°F to Joules/kilogram/°C Converter (Btu (th)/(lb·°F) to J/(kg·°C))

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Live Conversion • ISO 80000-5:2019 Certified
1 BTU (th)/pound/°F = 4184 Joule/kilogram/°C
1 Btu (th)/(lb·°F) = 4,184 J/(kg·°C) • 1 J/(kg·°C) = 0.000239006 Btu (th)/(lb·°F)
BTU (th)/pound/°F to Joule/kilogram/°C: One BTU (th)/pound/°F is equal to 4184 Joules/kilogram/°C.
Certified Authority Value
4184.00000000
J/(kg·°C)
Exact: 1 J/(kg·°C) ≡ 0.0002390057361 Btu (th)/(lb·°F)
Btu (th)/(lb·°F)
Btu (th)/(lb·°F)
Swap to Joule/kilogram/°C to BTU (th)/pound/°F
Swap to Joule/kilogram/°C to BTU (th)/pound/°F
J/(kg·°C)
J/(kg·°C) 4184
Quick Values:
Conversion Formula
To convert BTU (th)/pound/°F to Joule/kilogram/°C, multiply by 4184
Btu (th)/(lb·°F) × 4184 = J/(kg·°C)

Calculation: 1 Btu (th)/(lb·°F) × 4184 = 4184 J/(kg·°C)

Common BTU (th)/pound/°F to Joule/kilogram/°C Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between BTU (th)/pound/°F (Btu (th)/(lb·°F)) and Joule/kilogram/°C (J/(kg·°C)).

Tap any row to calculate
BTU (th)/pound/°F to Joule/kilogram/°C: Primary Direct Table (15 Steps)
BTU (th)/pound/°F to Joule/kilogram/°C Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 Btu (th)/(lb·°F) 4.184 J/(kg·°C) 4.184 × 10⁰
0.01 Btu (th)/(lb·°F) 41.84 J/(kg·°C) 4.184 × 10¹
0.1 Btu (th)/(lb·°F) 418.4 J/(kg·°C) 4.184 × 10²
0.5 Btu (th)/(lb·°F) 2092 J/(kg·°C) 2.092 × 10³
1 Btu (th)/(lb·°F) 4184 J/(kg·°C) 4.184 × 10³
2 Btu (th)/(lb·°F) 8368 J/(kg·°C) 8.368 × 10³
5 Btu (th)/(lb·°F) 20920 J/(kg·°C) 2.092 × 10⁴
10 Btu (th)/(lb·°F) 41840 J/(kg·°C) 4.184 × 10⁴
20 Btu (th)/(lb·°F) 83680 J/(kg·°C) 8.368 × 10⁴
25 Btu (th)/(lb·°F) 104600 J/(kg·°C) 1.046 × 10⁵
50 Btu (th)/(lb·°F) 209200 J/(kg·°C) 2.092 × 10⁵
100 Btu (th)/(lb·°F) 418400 J/(kg·°C) 4.184 × 10⁵
250 Btu (th)/(lb·°F) 1046000 J/(kg·°C) 1.046 × 10⁶
500 Btu (th)/(lb·°F) 2092000 J/(kg·°C) 2.092 × 10⁶
1000 Btu (th)/(lb·°F) 4184000 J/(kg·°C) 4.184 × 10⁶
Joule/kilogram/°C to BTU (th)/pound/°F: Reciprocal Summary
Joule/kilogram/°C to BTU (th)/pound/°F Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 J/(kg·°C) 0.000239006 Btu (th)/(lb·°F) 2.39 × 10⁻⁴
5 J/(kg·°C) 0.00119503 Btu (th)/(lb·°F) 1.195 × 10⁻³
10 J/(kg·°C) 0.00239006 Btu (th)/(lb·°F) 2.39 × 10⁻³
50 J/(kg·°C) 0.0119503 Btu (th)/(lb·°F) 1.195 × 10⁻²
100 J/(kg·°C) 0.0239006 Btu (th)/(lb·°F) 2.39 × 10⁻²
View Complete 15-Row Joule/kilogram/°C to BTU (th)/pound/°F Table

Real-World Context & Everyday Benchmarks

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To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for BTU (th)/pound/°F (Btu (th)/(lb·°F)) and Joule/kilogram/°C (J/(kg·°C)):

BTU (th)/pound/°F References:

  • Pure liquid water standard specific heat capacity at 25°C 1 Btu (th)/(lb·°F)
  • Dry atmospheric air specific heat at constant pressure cp 0.240201 Btu (th)/(lb·°F)
  • Solid structural aluminum metal specific heat capacity 0.214388 Btu (th)/(lb·°F)
  • Pure electrical copper metal specific heat capacity 0.092017 Btu (th)/(lb·°F)

Joule/kilogram/°C References:

  • Pure liquid water standard specific heat capacity at 25°C 4184 J/(kg·°C)
  • Dry atmospheric air specific heat at constant pressure cp 1005 J/(kg·°C)
  • Solid structural aluminum metal specific heat capacity 897 J/(kg·°C)
  • Pure electrical copper metal specific heat capacity 385 J/(kg·°C)

Tap any benchmark above to automatically calculate its exact equivalent in Joule/kilogram/°C.

ISQ Dimension: [L² T⁻² Θ⁻¹] Coherent SI Unit: joule per kilogram kelvin (J/(kg·K)) Thermodynamics & Heat Transfer

How to Convert BTU (th)/pound/°F to Joule/kilogram/°C

Converting BTU (th)/pound/°F (Btu (th)/(lb·°F)) to Joule/kilogram/°C (J/(kg·°C)) is a core calculation in Specific Heat Capacity, which measures the thermal energy required to raise the temperature of a unit mass of substance by one degree. This calculation navigates the boundary between the International Metric System (SI) and British Imperial / US Customary engineering standards. In contemporary metrology, Imperial units are defined in terms of exact SI standards via international agreements—notably NIST SP 811 and the 1959 International Yard and Pound Agreement. Exactly 1 BTU (th)/pound/°F equals 4184 Joule/kilogram/°C, while 1 J/(kg·°C) equals 0.000239006 Btu (th)/(lb·°F).

Direct Factor1 Btu (th)/(lb·°F) = 4184 J/(kg·°C)
Inverse Ratio1 J/(kg·°C) = 0.000239006 Btu (th)/(lb·°F)
Conversion ScaleMetric SI to British Imperial / US Customary Bridge
First-Principles SI Derivation ProofNIST SP 811 / ISO 80000 Compliance

Mathematical Conversion Derivation via Coherent SI Base Unit

Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (joule per kilogram kelvin (J/(kg·K))) without arbitrary rounding:

Vtarget=Vsource×(ksource→SIktarget→SI)V_{\text{target}} = V_{\text{source}} \times \left( \frac{k_{\text{source} \to \text{SI}}}{k_{\text{target} \to \text{SI}}} \right)
Universal Dimensional Conversion Law (ISO 80000 / NIST SP 811)
1. Source SI Bridge (ksource):1 Btu (th)/(lb·°F) = 4184 joule per kilogram kelvin (J/(kg·K))
2. Target SI Bridge (ktarget):1 J/(kg·°C) = 1 joule per kilogram kelvin (J/(kg·K))
Step-by-step substitution for BTU (th)/pound/°F → Joule/kilogram/°C:V(J/(kg·°C)) = V(Btu (th)/(lb·°F)) × ( 4184 / 1 ) = V(Btu (th)/(lb·°F)) × 4184
Mathematical FormulaValue in Joule/kilogram/°C = Value in BTU (th)/pound/°F × 4184Direct computational formula applied for standard conversion.
Worked Example

For an engineering input of 250 Btu (th)/(lb·°F), applying the conversion factor yields exactly 1046000 J/(kg·°C). At larger operational scale, 100 BTU (th)/pound/°F corresponds to 418400 J/(kg·°C).

Inverse check: 1 J/(kg·°C) = 0.000239006 Btu (th)/(lb·°F).

Understanding BTU (th)/pound/°F and Joule/kilogram/°C

BTU (th)/pound/°F

Btu (th)/(lb·°F)
Imperial / US

A BTU (th)/pound/°F (Btu (th)/(lb·°F)) is an imperial and US customary unit for specific heat capacity.

Applications & Practical Context

In practical specific heat capacity terms, a pure liquid water standard specific heat capacity at 25°C equals 1 Btu (th)/(lb·°F), a dry atmospheric air specific heat at constant pressure cp equals 0.240201 Btu (th)/(lb·°F), a solid structural aluminum metal specific heat capacity equals 0.214388 Btu (th)/(lb·°F).

Physical Setup

A physical magnitude of 1 Btu (th)/(lb·°F) corresponds to 4184 J/(kg·K) in standard SI measurement.

Conversion to SI Unit: joule per kilogram kelvin (J/(kg·K))
1 Btu (th)/(lb·°F) = 4184 J/(kg·K)

Joule/kilogram/°C

J/(kg·°C)
Standard Unit

A Joule/kilogram/°C (J/(kg·°C)) is a recognized unit for specific heat capacity.

Applications & Practical Context

In practical specific heat capacity terms, a pure liquid water standard specific heat capacity at 25°C equals 4184 J/(kg·°C), a dry atmospheric air specific heat at constant pressure cp equals 1005 J/(kg·°C), a solid structural aluminum metal specific heat capacity equals 897 J/(kg·°C).

Physical Setup

A specific heat capacity of 1 J/(kg·°C) means 1 Joule/kilogram/°C of heat energy changes the temperature of 1 unit mass by 1 degree.

Conversion to SI Unit: joule per kilogram kelvin (J/(kg·K))
1 J/(kg·°C) = 1 J/(kg·K)

Domain Metrology & Engineering Applications

Governing Law & Equation

Specific Enthalpy Derivative (c_p = (∂h/∂T)_p)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using differential scanning calorimeters (DSC), adiabatic drop calorimeters, and dual-furnace calorimeter systems.

Primary Industry Sectors

Applied across battery thermal runaway mitigation (EV cell modeling), chemical synthesis reactor safety, molten salt solar storage, and cryogenic coolant engineering under international metrology standard ISO 80000-5:2019, NIST Chemistry WebBook.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-5:2019, NIST Chemistry WebBook and the BIPM SI Brochure (9th Edition). Governed by Specific Enthalpy Derivative (c_p = (∂h/∂T)_p) under ISO 80000 dimensional vector [L² T⁻² Θ⁻¹].

Multi-Variable Engineering Bridge Thermodynamics & Heat Storage

Specific Heat Capacity to Thermal Energy Storage Bridge (Joules • Kilojoules • Megajoules • kWh • BTU)

Calculate total sensible thermal storage energy Q = c_p × (m × ΔT) for heating or cooling mass charges, bridging specific heat capacity [L² T⁻² Θ⁻¹] with stored thermal energy [M L² T⁻²].

Q = c_p × (m × ΔT)
Vector: [J/(kg·K)] × [kg·K] → [J]
Live Calculated Bridge Equivalent:
1 Btu (th)/(lb·°F) at 50 kg Domestic Water at 40K Swing (2,000 kg·K) = 8368000 J
Equals 8368 kJ • 8.368 MJ • 2.324444 kWh
SI Energy
8368000
J
Joules
Thermal Scale
8368
kJ
Kilojoules
Bulk Energy
8.368
MJ
Megajoules
Electric Utility Meter
2.324444
kWh
Kilowatt-Hours
Battery Capacity
2324.4444
Wh
Watt-Hours
Imperial Thermal
7931.3337
BTU
British Thermal Units
  1. 1. Normalize Input to SI Base Unit (J/(kg·K)):
    c_p = 1 Btu (th)/(lb·°F) × 4184 = 4184 J/(kg·K)
  2. 2. Apply Engineering Parameter (mΔT):
    Selected condition: 50 kg Domestic Water at 40K Swing (2,000 kg·K) at mΔT = 2000 kg·K
  3. 3. Execute Governing Physical Law in SI Units:
    Q = c_p × (m × ΔT) = (4184 J/(kg·K)) × (2000 kg·K) = 8368000 J
  4. 4. Convert to Standard Engineering Units:
    • J: 8368000 × 1 = 8368000 J (Joules) • kJ: 8368000 × 0.001 = 8368 kJ (Kilojoules) • MJ: 8368000 × 1 × 10⁻⁶ = 8.368 MJ (Megajoules) • kWh: 8368000 × 2.7778 × 10⁻⁷ = 2.324444 kWh (Kilowatt-Hours) • Wh: 8368000 × 0.0002778 = 2324.4444 Wh (Watt-Hours) • BTU: 8368000 × 0.0009478 = 7931.3337 BTU (British Thermal Units)
Explore Full Energy Converter →
Engineering Substance / Operating Standard Parameter Value (kg·K) Reference State / Condition Typical Industrial & Engineering Application
50 kg Domestic Water at 40K Swing (2,000 kg·K) 2000 m = 50 kg, ΔT = 40 K 50-liter domestic hot water tank charge
1,000 kg Hydronic Buffer at 20K Swing (20,000 kg·K) 20000 m = 1,000 kg, ΔT = 20 K Commercial heat pump thermal buffer storage
200 kg Engine Block at 70K Swing (14,000 kg·K) 14000 m = 200 kg, ΔT = 70 K Cast iron engine warm-up heat soak
10,000 kg Process Fluid at 50K Swing (500,000 kg·K) 500000 m = 10,000 kg, ΔT = 50 K Industrial batch chemical reactor heat load
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Frequently Asked Questions

There are exactly 4184 joules/kilogram/°c (J/(kg·°C)) in 1 btu (th)/pound/°f (Btu (th)/(lb·°F)). To calculate larger amounts manually, simply multiply your total number of btus (th)/pound/°f by the conversion multiplier of 4184.

The mathematical formula to convert btus (th)/pound/°f to joules/kilogram/°c is: [value] * 4184 = joules/kilogram/°c. Rather than doing the math manually, you can use our high-precision online calculator to process this exact equation instantly without rounding errors.

To perform the reverse calculation from joules/kilogram/°c back to btus (th)/pound/°f, you must divide your starting value by 4184. Our bidirectional tool automatically computes this inverse equation the moment you type into the joule/kilogram/°c input field.

1 BTU (th)/pound/°F is larger than 1 Joule/kilogram/°C. Specifically, 1 BTU (th)/pound/°F equals exactly 4184 joules/kilogram/°c, making it 4184 times larger (a difference of 3.62 orders of magnitude). Therefore, quantities expressed in joules/kilogram/°c require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 BTU (th)/pound/°F converts to 4184 joules/kilogram/°c. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.