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Btu (it) Feet/hour/sq. foot/°F to Kilocalories (th)/hour/meter/°C Converter (Btu·ft/(h·ft²·°F) to kcal (th)/(h·m·°C))

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Live Conversion • ISO 80000-5:2019 Certified
1 Btu (IT) foot/hour/sq. foot/°F = 1.48915985 Kilocalorie (th)/hour/meter/°C
1 Btu·ft/(h·ft²·°F) = 1.48916 kcal (th)/(h·m·°C) • 1 kcal (th)/(h·m·°C) = 0.67152 Btu·ft/(h·ft²·°F)
Btu (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C: One Btu (IT) foot/hour/sq. foot/°F is equal to 1.48915985 Kilocalories (th)/hour/meter/°C.
Certified Authority Value
1.48915985
kcal (th)/(h·m·°C)
Exact: 1 kcal (th)/(h·m·°C) ≡ 0.6715195834 Btu·ft/(h·ft²·°F)
Btu·ft/(h·ft²·°F)
Btu·ft/(h·ft²·°F)
Swap to Kilocalorie (th)/hour/meter/°C to Btu (IT) foot/hour/sq. foot/°F
Swap to Kilocalorie (th)/hour/meter/°C to Btu (IT) foot/hour/sq. foot/°F
kcal (th)/(h·m·°C)
kcal (th)/(h·m·°C) 1.48915985
Quick Values:
Conversion Formula
To convert Btu (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C, multiply by 1.48915985
Btu·ft/(h·ft²·°F) × 1.48915985 = kcal (th)/(h·m·°C)

Calculation: 1 Btu·ft/(h·ft²·°F) × 1.48915985 = 1.48915985 kcal (th)/(h·m·°C)

Common Btu (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Btu (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)) and Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)).

Tap any row to calculate
Btu (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C: Primary Direct Table (15 Steps)
Btu (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 Btu·ft/(h·ft²·°F) 0.00148916 kcal (th)/(h·m·°C) 1.489 × 10⁻³
0.01 Btu·ft/(h·ft²·°F) 0.0148916 kcal (th)/(h·m·°C) 1.489 × 10⁻²
0.1 Btu·ft/(h·ft²·°F) 0.148916 kcal (th)/(h·m·°C) 1.489 × 10⁻¹
0.5 Btu·ft/(h·ft²·°F) 0.74458 kcal (th)/(h·m·°C) 7.446 × 10⁻¹
1 Btu·ft/(h·ft²·°F) 1.48916 kcal (th)/(h·m·°C) 1.489 × 10⁰
2 Btu·ft/(h·ft²·°F) 2.97832 kcal (th)/(h·m·°C) 2.978 × 10⁰
5 Btu·ft/(h·ft²·°F) 7.445799 kcal (th)/(h·m·°C) 7.446 × 10⁰
10 Btu·ft/(h·ft²·°F) 14.891598 kcal (th)/(h·m·°C) 1.489 × 10¹
20 Btu·ft/(h·ft²·°F) 29.783197 kcal (th)/(h·m·°C) 2.978 × 10¹
25 Btu·ft/(h·ft²·°F) 37.228996 kcal (th)/(h·m·°C) 3.723 × 10¹
50 Btu·ft/(h·ft²·°F) 74.457992 kcal (th)/(h·m·°C) 7.446 × 10¹
100 Btu·ft/(h·ft²·°F) 148.915985 kcal (th)/(h·m·°C) 1.489 × 10²
250 Btu·ft/(h·ft²·°F) 372.289962 kcal (th)/(h·m·°C) 3.723 × 10²
500 Btu·ft/(h·ft²·°F) 744.579923 kcal (th)/(h·m·°C) 7.446 × 10²
1000 Btu·ft/(h·ft²·°F) 1489.159847 kcal (th)/(h·m·°C) 1.489 × 10³
Kilocalorie (th)/hour/meter/°C to Btu (IT) foot/hour/sq. foot/°F: Reciprocal Summary
Kilocalorie (th)/hour/meter/°C to Btu (IT) foot/hour/sq. foot/°F Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 kcal (th)/(h·m·°C) 0.67152 Btu·ft/(h·ft²·°F) 6.715 × 10⁻¹
5 kcal (th)/(h·m·°C) 3.357598 Btu·ft/(h·ft²·°F) 3.358 × 10⁰
10 kcal (th)/(h·m·°C) 6.715196 Btu·ft/(h·ft²·°F) 6.715 × 10⁰
50 kcal (th)/(h·m·°C) 33.575979 Btu·ft/(h·ft²·°F) 3.358 × 10¹
100 kcal (th)/(h·m·°C) 67.151958 Btu·ft/(h·ft²·°F) 6.715 × 10¹
View Complete 15-Row Kilocalorie (th)/hour/meter/°C to Btu (IT) foot/hour/sq. foot/°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 (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)) and Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)):

Btu (IT) foot/hour/sq. foot/°F References:

  • Liquid water thermal conductivity in cooling tower systems 0.35 Btu·ft/(h·ft²·°F)
  • Standard architectural building window float glass panel 0.55 Btu·ft/(h·ft²·°F)
  • Cast aluminum automotive engine cylinder head material 120 Btu·ft/(h·ft²·°F)

Kilocalorie (th)/hour/meter/°C References:

  • Dense structural concrete building foundation wall conductivity 1.3 kcal (th)/(h·m·°C)

Tap any benchmark above to automatically calculate its exact equivalent in Kilocalorie (th)/hour/meter/°C.

ISQ Dimension: [M L T⁻³ Θ⁻¹] Coherent SI Unit: watt per meter kelvin (W/(m·K)) Thermodynamics & Heat Transfer

How to Convert Btu (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C

Converting Btu (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)) to Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)) is a core calculation in Thermal Conductivity, which measures a material's intrinsic capacity to conduct and transfer heat through microscopic collisions. 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 (IT) foot/hour/sq. foot/°F equals 1.48916 Kilocalorie (th)/hour/meter/°C, while 1 kcal (th)/(h·m·°C) equals 0.67152 Btu·ft/(h·ft²·°F).

Direct Factor1 Btu·ft/(h·ft²·°F) = 1.48916 kcal (th)/(h·m·°C)
Inverse Ratio1 kcal (th)/(h·m·°C) = 0.67152 Btu·ft/(h·ft²·°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 (watt per meter kelvin (W/(m·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·ft/(h·ft²·°F) = 1.730735 watt per meter kelvin (W/(m·K))
2. Target SI Bridge (ktarget):1 kcal (th)/(h·m·°C) = 1.162222 watt per meter kelvin (W/(m·K))
Step-by-step substitution for Btu (IT) foot/hour/sq. foot/°F → Kilocalorie (th)/hour/meter/°C:V(kcal (th)/(h·m·°C)) = V(Btu·ft/(h·ft²·°F)) × ( 1.730735 / 1.162222 ) = V(Btu·ft/(h·ft²·°F)) × 1.48916
Mathematical FormulaValue in Kilocalorie (th)/hour/meter/°C = Value in Btu (IT) foot/hour/sq. foot/°F × 1.48915985Direct computational formula applied for standard conversion.
Worked Example

To convert 120 Btu (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)) to Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)): multiply 120 by 1.48916 to get 178.699182 kcal (th)/(h·m·°C). At an industrial engineering scale, 480 Btu·ft/(h·ft²·°F) converts to 714.796726 kcal (th)/(h·m·°C).

Inverse check: 1 kcal (th)/(h·m·°C) = 0.67152 Btu·ft/(h·ft²·°F).

Understanding Btu (IT) foot/hour/sq. foot/°F and Kilocalorie (th)/hour/meter/°C

Btu (IT) foot/hour/sq. foot/°F

Btu·ft/(h·ft²·°F)
Imperial / US

A Btu (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)) is an imperial and US customary unit for thermal conductivity.

Applications & Practical Context

In practical thermal conductivity terms, a liquid water thermal conductivity in cooling tower systems equals 0.35 Btu·ft/(h·ft²·°F), a standard architectural building window float glass panel equals 0.55 Btu·ft/(h·ft²·°F), a cast aluminum automotive engine cylinder head material equals 120 Btu·ft/(h·ft²·°F).

Physical Setup

A physical magnitude of 1 Btu·ft/(h·ft²·°F) corresponds to 1.730735 W/(m·K) in standard SI measurement.

Conversion to SI Unit: watt per meter kelvin (W/(m·K))
1 Btu·ft/(h·ft²·°F) = 1.730735 W/(m·K)

Kilocalorie (th)/hour/meter/°C

kcal (th)/(h·m·°C)
SI Multiple

A Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)) is a decimal multiple of the SI-derived unit for thermal conductivity.

Applications & Practical Context

In practical thermal conductivity terms, a dense structural concrete building foundation wall conductivity equals 1.3 kcal (th)/(h·m·°C).

Physical Setup

A physical magnitude of 1 kcal (th)/(h·m·°C) corresponds to 1.162222 W/(m·K) in standard SI measurement.

Conversion to SI Unit: watt per meter kelvin (W/(m·K))
1 kcal (th)/(h·m·°C) = 1.162222 W/(m·K)

Domain Metrology & Engineering Applications

Governing Law & Equation

Fourier's Law of Heat Conduction (q = -k · ∇T)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using guarded hot plate apparatus (ASTM C177), laser flash thermal diffusivity analyzers, and transient plane source (TPS) sensors.

Primary Industry Sectors

Applied across thermal interface material (TIM) development, architectural insulation manufacturing, aerospace heat shield design, and refractory ceramics under international metrology standard ISO 80000-5:2019, ASTM C177.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-5:2019, ASTM C177 and the BIPM SI Brochure (9th Edition). Governed by Fourier's Law of Heat Conduction (q = -k · ∇T) under ISO 80000 dimensional vector [M L T⁻³ Θ⁻¹].

Multi-Variable Engineering Bridge Heat Transfer & Conduction Physics

Thermal Conductivity to Heat Flux Density Bridge (W/m² • kW/m² • BTU/(h·ft²) • cal/(s·cm²))

Calculate Fourier conduction heat flux q" = k × ∇T across building envelopes and industrial heat exchangers, bridging thermal conductivity [M L T⁻³ Θ⁻¹] with heat flux density [M T⁻³].

q" = k × ∇T
Vector: [W/(m·K)] × [K/m] → [W/m²]
Live Calculated Bridge Equivalent:
1 Btu·ft/(h·ft²·°F) at Insulated Wall Core (20K across 0.1m = 200 K/m) = 346.1469 W/m²
Equals 0.3461 kW/m² • 109.728 BTU/(h·ft²) • 0.00826758 cal/(s·cm²)
SI Heat Flux
346.1469
W/m²
Watts per Square Meter
Solar / Combustion
0.3461
kW/m²
Kilowatts per Square Meter
US Building Envelope
109.728
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
0.00826758
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
0.4961
Ly/min
Langley per Minute
Furnace Flux
0.00034615
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m·K)):
    k = 1 Btu·ft/(h·ft²·°F) × 1.73073467 = 1.73073467 W/(m·K)
  2. 2. Apply Engineering Parameter (∇T):
    Selected condition: Insulated Wall Core (20K across 0.1m = 200 K/m) at ∇T = 200 K/m
  3. 3. Execute Governing Physical Law in SI Units:
    q" = k × ∇T = (1.73073467 W/(m·K)) × (200 K/m) = 346.146933 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 346.146933 × 1 = 346.1469 W/m² (Watts per Square Meter) • kW/m²: 346.146933 × 0.001 = 0.3461 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 346.146933 × 0.317 = 109.728 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 346.146933 × 2.3885 × 10⁻⁵ = 0.00826758 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 346.146933 × 0.001433 = 0.4961 Ly/min (Langley per Minute) • MW/m²: 346.146933 × 1 × 10⁻⁶ = 0.00034615 MW/m² (Megawatts per Square Meter)
Explore Full Heat Flux Density Converter →
Engineering Substance / Operating Standard Parameter Value (K/m) Reference State / Condition Typical Industrial & Engineering Application
Insulated Wall Core (20K across 0.1m = 200 K/m) 200 200 K/m Standard residential fiberglass/mineral wool batt
Solid Brick Masonry (25K across 0.25m = 100 K/m) 100 100 K/m Architectural structural brick veneer wall
Steam Boiler Tube Wall (100K across 0.005m = 20,000 K/m) 20000 20,000 K/m Carbon steel heat recovery steam boiler tube
CPU Copper Heat Spreader (30K across 0.002m = 15,000 K/m) 15000 15,000 K/m Semiconductor thermal interface heat spreader
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Frequently Asked Questions

There are exactly 1.48915985 kilocalories (th)/hour/meter/°c (kcal (th)/(h·m·°C)) in 1 btu (it) foot/hour/sq. foot/°f (Btu·ft/(h·ft²·°F)). To calculate larger amounts manually, simply multiply your total number of btu (it) feet/hour/sq. foot/°f by the conversion multiplier of 1.48915985.

The mathematical formula to convert btu (it) feet/hour/sq. foot/°f to kilocalories (th)/hour/meter/°c is: [value] * 1.48915985 = kilocalories (th)/hour/meter/°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 kilocalories (th)/hour/meter/°c back to btu (it) feet/hour/sq. foot/°f, you must divide your starting value by 1.48915985. Our bidirectional tool automatically computes this inverse equation the moment you type into the kilocalorie (th)/hour/meter/°c input field.

1 Btu (IT) foot/hour/sq. foot/°F is larger than 1 Kilocalorie (th)/hour/meter/°C. Specifically, 1 Btu (IT) foot/hour/sq. foot/°F equals exactly 1.48915985 kilocalories (th)/hour/meter/°c, making it 1.4892 times larger (a difference of 0.17 orders of magnitude). Therefore, quantities expressed in kilocalories (th)/hour/meter/°c require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 Btu (IT) foot/hour/sq. foot/°F converts to 1.48915985 kilocalories (th)/hour/meter/°c. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.