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Btu (it) Inches/second/sq. foot/°F to Kilocalories (th)/hour/meter/°C Converter (Btu·in/(s·ft²·°F) to kcal (th)/(h·m·°C))

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Live Conversion • ISO 80000-5:2019 Certified
1 Btu (IT) inch/second/sq. foot/°F = 446.74795403 Kilocalorie (th)/hour/meter/°C
1 Btu·in/(s·ft²·°F) = 446.747954 kcal (th)/(h·m·°C) • 1 kcal (th)/(h·m·°C) = 0.0022384 Btu·in/(s·ft²·°F)
Btu (IT) inch/second/sq. foot/°F to Kilocalorie (th)/hour/meter/°C: One Btu (IT) inch/second/sq. foot/°F is equal to 446.74795403 Kilocalories (th)/hour/meter/°C.
Certified Authority Value
446.74795403
kcal (th)/(h·m·°C)
Exact: 1 kcal (th)/(h·m·°C) ≡ 0.002238398611 Btu·in/(s·ft²·°F)
Btu·in/(s·ft²·°F)
Btu·in/(s·ft²·°F)
Swap to Kilocalorie (th)/hour/meter/°C to Btu (IT) inch/second/sq. foot/°F
Swap to Kilocalorie (th)/hour/meter/°C to Btu (IT) inch/second/sq. foot/°F
kcal (th)/(h·m·°C)
kcal (th)/(h·m·°C) 446.74795403
Quick Values:
Conversion Formula
To convert Btu (IT) inch/second/sq. foot/°F to Kilocalorie (th)/hour/meter/°C, multiply by 446.74795403
Btu·in/(s·ft²·°F) × 446.74795403 = kcal (th)/(h·m·°C)

Calculation: 1 Btu·in/(s·ft²·°F) × 446.74795403 = 446.74795403 kcal (th)/(h·m·°C)

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

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

Tap any row to calculate
Btu (IT) inch/second/sq. foot/°F to Kilocalorie (th)/hour/meter/°C: Primary Direct Table (15 Steps)
Btu (IT) inch/second/sq. foot/°F to Kilocalorie (th)/hour/meter/°C Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 Btu·in/(s·ft²·°F) 0.446748 kcal (th)/(h·m·°C) 4.467 × 10⁻¹
0.01 Btu·in/(s·ft²·°F) 4.46748 kcal (th)/(h·m·°C) 4.467 × 10⁰
0.1 Btu·in/(s·ft²·°F) 44.674795 kcal (th)/(h·m·°C) 4.467 × 10¹
0.5 Btu·in/(s·ft²·°F) 223.373977 kcal (th)/(h·m·°C) 2.234 × 10²
1 Btu·in/(s·ft²·°F) 446.747954 kcal (th)/(h·m·°C) 4.467 × 10²
2 Btu·in/(s·ft²·°F) 893.495908 kcal (th)/(h·m·°C) 8.935 × 10²
5 Btu·in/(s·ft²·°F) 2233.73977 kcal (th)/(h·m·°C) 2.234 × 10³
10 Btu·in/(s·ft²·°F) 4467.47954 kcal (th)/(h·m·°C) 4.467 × 10³
20 Btu·in/(s·ft²·°F) 8934.959081 kcal (th)/(h·m·°C) 8.935 × 10³
25 Btu·in/(s·ft²·°F) 11168.698851 kcal (th)/(h·m·°C) 1.117 × 10⁴
50 Btu·in/(s·ft²·°F) 22337.397702 kcal (th)/(h·m·°C) 2.234 × 10⁴
100 Btu·in/(s·ft²·°F) 44674.795403 kcal (th)/(h·m·°C) 4.467 × 10⁴
250 Btu·in/(s·ft²·°F) 111686.988509 kcal (th)/(h·m·°C) 1.117 × 10⁵
500 Btu·in/(s·ft²·°F) 223373.977017 kcal (th)/(h·m·°C) 2.234 × 10⁵
1000 Btu·in/(s·ft²·°F) 446747.954035 kcal (th)/(h·m·°C) 4.467 × 10⁵
Kilocalorie (th)/hour/meter/°C to Btu (IT) inch/second/sq. foot/°F: Reciprocal Summary
Kilocalorie (th)/hour/meter/°C to Btu (IT) inch/second/sq. foot/°F Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 kcal (th)/(h·m·°C) 0.0022384 Btu·in/(s·ft²·°F) 2.238 × 10⁻³
5 kcal (th)/(h·m·°C) 0.011192 Btu·in/(s·ft²·°F) 1.119 × 10⁻²
10 kcal (th)/(h·m·°C) 0.022384 Btu·in/(s·ft²·°F) 2.238 × 10⁻²
50 kcal (th)/(h·m·°C) 0.11192 Btu·in/(s·ft²·°F) 1.119 × 10⁻¹
100 kcal (th)/(h·m·°C) 0.22384 Btu·in/(s·ft²·°F) 2.238 × 10⁻¹
View Complete 15-Row Kilocalorie (th)/hour/meter/°C to Btu (IT) inch/second/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) inch/second/sq. foot/°F (Btu·in/(s·ft²·°F)) and Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)):

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

  • Aerospace heat exchanger copper-alloy thermal conductor 0.077 Btu·in/(s·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) inch/second/sq. foot/°F to Kilocalorie (th)/hour/meter/°C

Converting Btu (IT) inch/second/sq. foot/°F (Btu·in/(s·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) inch/second/sq. foot/°F equals 446.747954 Kilocalorie (th)/hour/meter/°C, while 1 kcal (th)/(h·m·°C) equals 0.0022384 Btu·in/(s·ft²·°F).

Direct Factor1 Btu·in/(s·ft²·°F) = 446.747954 kcal (th)/(h·m·°C)
Inverse Ratio1 kcal (th)/(h·m·°C) = 0.0022384 Btu·in/(s·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·in/(s·ft²·°F) = 519.2204 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) inch/second/sq. foot/°F → Kilocalorie (th)/hour/meter/°C:V(kcal (th)/(h·m·°C)) = V(Btu·in/(s·ft²·°F)) × ( 519.2204 / 1.162222 ) = V(Btu·in/(s·ft²·°F)) × 446.747954
Mathematical FormulaValue in Kilocalorie (th)/hour/meter/°C = Value in Btu (IT) inch/second/sq. foot/°F × 446.74795403Direct computational formula applied for standard conversion.
Worked Example

To convert 24 Btu (IT) inch/second/sq. foot/°F (Btu·in/(s·ft²·°F)) to Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)): multiply 24 by 446.747954 to get 10721.950897 kcal (th)/(h·m·°C). At an industrial engineering scale, 1000 Btu·in/(s·ft²·°F) converts to 446747.954035 kcal (th)/(h·m·°C).

Inverse check: 1 kcal (th)/(h·m·°C) = 0.0022384 Btu·in/(s·ft²·°F).

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

Btu (IT) inch/second/sq. foot/°F

Btu·in/(s·ft²·°F)
Imperial / US

A Btu (IT) inch/second/sq. foot/°F (Btu·in/(s·ft²·°F)) is an imperial and US customary unit for thermal conductivity.

Applications & Practical Context

In practical thermal conductivity terms, a aerospace heat exchanger copper-alloy thermal conductor equals 0.077 Btu·in/(s·ft²·°F).

Physical Setup

A physical magnitude of 1 Btu·in/(s·ft²·°F) corresponds to 519.2204 W/(m·K) in standard SI measurement.

Conversion to SI Unit: watt per meter kelvin (W/(m·K))
1 Btu·in/(s·ft²·°F) = 519.2204 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·in/(s·ft²·°F) at Insulated Wall Core (20K across 0.1m = 200 K/m) = 103844.08 W/m²
Equals 103.8441 kW/m² • 32918.4068 BTU/(h·ft²) • 2.480273 cal/(s·cm²)
SI Heat Flux
103844.08
W/m²
Watts per Square Meter
Solar / Combustion
103.8441
kW/m²
Kilowatts per Square Meter
US Building Envelope
32918.4068
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
2.480273
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
148.8432
Ly/min
Langley per Minute
Furnace Flux
0.103844
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m·K)):
    k = 1 Btu·in/(s·ft²·°F) × 519.22039991 = 519.22039991 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 = (519.22039991 W/(m·K)) × (200 K/m) = 103844.079982 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 103844.079982 × 1 = 103844.08 W/m² (Watts per Square Meter) • kW/m²: 103844.079982 × 0.001 = 103.8441 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 103844.079982 × 0.317 = 32918.4068 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 103844.079982 × 2.3885 × 10⁻⁵ = 2.480273 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 103844.079982 × 0.001433 = 148.8432 Ly/min (Langley per Minute) • MW/m²: 103844.079982 × 1 × 10⁻⁶ = 0.103844 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 446.74795403 kilocalories (th)/hour/meter/°c (kcal (th)/(h·m·°C)) in 1 btu (it) inch/second/sq. foot/°f (Btu·in/(s·ft²·°F)). To calculate larger amounts manually, simply multiply your total number of btu (it) inches/second/sq. foot/°f by the conversion multiplier of 446.74795403.

The mathematical formula to convert btu (it) inches/second/sq. foot/°f to kilocalories (th)/hour/meter/°c is: [value] * 446.74795403 = 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) inches/second/sq. foot/°f, you must divide your starting value by 446.74795403. Our bidirectional tool automatically computes this inverse equation the moment you type into the kilocalorie (th)/hour/meter/°c input field.

1 Btu (IT) inch/second/sq. foot/°F is larger than 1 Kilocalorie (th)/hour/meter/°C. Specifically, 1 Btu (IT) inch/second/sq. foot/°F equals exactly 446.74795403 kilocalories (th)/hour/meter/°c, making it 446.748 times larger (a difference of 2.65 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) inch/second/sq. foot/°F converts to 446.74795403 kilocalories (th)/hour/meter/°c. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.