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

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Live Conversion • ISO 80000-5:2019 Certified
1 Kilocalorie (th)/hour/meter/°C = 0.67151933 BTU (IT) foot/hour/sq. foot/°F
1 kcal (th)/(h·m·°C) = 0.671519 Btu·ft/(h·ft²·°F) • 1 Btu·ft/(h·ft²·°F) = 1.48916 kcal (th)/(h·m·°C)
Kilocalorie (th)/hour/meter/°C to BTU (IT) foot/hour/sq. foot/°F: One Kilocalorie (th)/hour/meter/°C is equal to 0.67151933 Btu (it) Feet/hour/sq. foot/°F.
Certified Authority Value
0.67151933
Btu·ft/(h·ft²·°F)
Exact: 1 Btu·ft/(h·ft²·°F) ≡ 1.4891604186 kcal (th)/(h·m·°C)
kcal (th)/(h·m·°C)
kcal (th)/(h·m·°C)
Swap to BTU (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C
Swap to BTU (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C
Btu·ft/(h·ft²·°F)
Btu·ft/(h·ft²·°F) 0.67151933
Quick Values:
Conversion Formula
To convert Kilocalorie (th)/hour/meter/°C to BTU (IT) foot/hour/sq. foot/°F, multiply by 0.67151933
kcal (th)/(h·m·°C) × 0.67151933 = Btu·ft/(h·ft²·°F)

Calculation: 1 kcal (th)/(h·m·°C) × 0.67151933 = 0.67151933 Btu·ft/(h·ft²·°F)

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

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

Tap any row to calculate
Kilocalorie (th)/hour/meter/°C to BTU (IT) foot/hour/sq. foot/°F: Primary Direct Table (15 Steps)
Kilocalorie (th)/hour/meter/°C to BTU (IT) foot/hour/sq. foot/°F Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 kcal (th)/(h·m·°C) 0.000671519 Btu·ft/(h·ft²·°F) 6.715 × 10⁻⁴
0.01 kcal (th)/(h·m·°C) 0.00671519 Btu·ft/(h·ft²·°F) 6.715 × 10⁻³
0.1 kcal (th)/(h·m·°C) 0.0671519 Btu·ft/(h·ft²·°F) 6.715 × 10⁻²
0.5 kcal (th)/(h·m·°C) 0.33576 Btu·ft/(h·ft²·°F) 3.358 × 10⁻¹
1 kcal (th)/(h·m·°C) 0.671519 Btu·ft/(h·ft²·°F) 6.715 × 10⁻¹
2 kcal (th)/(h·m·°C) 1.343039 Btu·ft/(h·ft²·°F) 1.343 × 10⁰
5 kcal (th)/(h·m·°C) 3.357597 Btu·ft/(h·ft²·°F) 3.358 × 10⁰
10 kcal (th)/(h·m·°C) 6.715193 Btu·ft/(h·ft²·°F) 6.715 × 10⁰
20 kcal (th)/(h·m·°C) 13.430387 Btu·ft/(h·ft²·°F) 1.343 × 10¹
25 kcal (th)/(h·m·°C) 16.787983 Btu·ft/(h·ft²·°F) 1.679 × 10¹
50 kcal (th)/(h·m·°C) 33.575966 Btu·ft/(h·ft²·°F) 3.358 × 10¹
100 kcal (th)/(h·m·°C) 67.151933 Btu·ft/(h·ft²·°F) 6.715 × 10¹
250 kcal (th)/(h·m·°C) 167.879831 Btu·ft/(h·ft²·°F) 1.679 × 10²
500 kcal (th)/(h·m·°C) 335.759663 Btu·ft/(h·ft²·°F) 3.358 × 10²
1000 kcal (th)/(h·m·°C) 671.519326 Btu·ft/(h·ft²·°F) 6.715 × 10²
BTU (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C: Reciprocal Summary
BTU (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu·ft/(h·ft²·°F) 1.48916 kcal (th)/(h·m·°C) 1.489 × 10⁰
5 Btu·ft/(h·ft²·°F) 7.445802 kcal (th)/(h·m·°C) 7.446 × 10⁰
10 Btu·ft/(h·ft²·°F) 14.891604 kcal (th)/(h·m·°C) 1.489 × 10¹
50 Btu·ft/(h·ft²·°F) 74.458021 kcal (th)/(h·m·°C) 7.446 × 10¹
100 Btu·ft/(h·ft²·°F) 148.916042 kcal (th)/(h·m·°C) 1.489 × 10²
View Complete 15-Row BTU (IT) foot/hour/sq. foot/°F to Kilocalorie (th)/hour/meter/°C 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 Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)) and BTU (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)):

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

  • Stationary atmospheric dry air thermal conductivity at sea level 0.022371 kcal (th)/(h·m·°C)
  • Commercial fiberglass building insulation batt thermal conductivity 0.034417 kcal (th)/(h·m·°C)
  • Liquid drinking water thermal conductivity at room temperature 0.516252 kcal (th)/(h·m·°C)
  • Architectural structural concrete wall thermal conductivity 1.2906 kcal (th)/(h·m·°C)

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

  • Stationary atmospheric dry air thermal conductivity at sea level 0.015023 Btu·ft/(h·ft²·°F)
  • Commercial fiberglass building insulation batt thermal conductivity 0.023112 Btu·ft/(h·ft²·°F)
  • Liquid drinking water thermal conductivity at room temperature 0.346674 Btu·ft/(h·ft²·°F)
  • Architectural structural concrete wall thermal conductivity 0.866684 Btu·ft/(h·ft²·°F)

Tap any benchmark above to automatically calculate its exact equivalent in BTU (IT) foot/hour/sq. foot/°F.

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

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

Converting Kilocalorie (th)/hour/meter/°C (kcal (th)/(h·m·°C)) to BTU (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)) 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 Kilocalorie (th)/hour/meter/°C equals 0.671519 BTU (IT) foot/hour/sq. foot/°F, while 1 Btu·ft/(h·ft²·°F) equals 1.48916 kcal (th)/(h·m·°C).

Direct Factor1 kcal (th)/(h·m·°C) = 0.671519 Btu·ft/(h·ft²·°F)
Inverse Ratio1 Btu·ft/(h·ft²·°F) = 1.48916 kcal (th)/(h·m·°C)
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 kcal (th)/(h·m·°C) = 1.162222 watt per meter kelvin (W/(m·K))
2. Target SI Bridge (ktarget):1 Btu·ft/(h·ft²·°F) = 1.730735 watt per meter kelvin (W/(m·K))
Step-by-step substitution for Kilocalorie (th)/hour/meter/°C → BTU (IT) foot/hour/sq. foot/°F:V(Btu·ft/(h·ft²·°F)) = V(kcal (th)/(h·m·°C)) × ( 1.162222 / 1.730735 ) = V(kcal (th)/(h·m·°C)) × 0.671519
Mathematical FormulaValue in BTU (IT) foot/hour/sq. foot/°F = Value in Kilocalorie (th)/hour/meter/°C × 0.67151933Direct computational formula applied for standard conversion.
Worked Example

Converting 250 kcal (th)/(h·m·°C) yields an exact output of 167.879831 Btu·ft/(h·ft²·°F) in BTU (IT) foot/hour/sq. foot/°F. Under higher industrial throughput, 2500 kcal (th)/(h·m·°C) translates to 1678.798314 Btu·ft/(h·ft²·°F).

Inverse check: 1 Btu·ft/(h·ft²·°F) = 1.48916 kcal (th)/(h·m·°C).

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

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 stationary atmospheric dry air thermal conductivity at sea level equals 0.022371 kcal (th)/(h·m·°C), a commercial fiberglass building insulation batt thermal conductivity equals 0.034417 kcal (th)/(h·m·°C), a liquid drinking water thermal conductivity at room temperature equals 0.516252 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)

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 stationary atmospheric dry air thermal conductivity at sea level equals 0.015023 Btu·ft/(h·ft²·°F), a commercial fiberglass building insulation batt thermal conductivity equals 0.023112 Btu·ft/(h·ft²·°F), a liquid drinking water thermal conductivity at room temperature equals 0.346674 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)

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 kcal (th)/(h·m·°C) at Insulated Wall Core (20K across 0.1m = 200 K/m) = 232.4444 W/m²
Equals 0.2324 kW/m² • 73.6845 BTU/(h·ft²) • 0.00555184 cal/(s·cm²)
SI Heat Flux
232.4444
W/m²
Watts per Square Meter
Solar / Combustion
0.2324
kW/m²
Kilowatts per Square Meter
US Building Envelope
73.6845
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
0.00555184
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
0.3332
Ly/min
Langley per Minute
Furnace Flux
0.00023244
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m·K)):
    k = 1 kcal (th)/(h·m·°C) × 1.162222 = 1.162222 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 = (1.162222 W/(m·K)) × (200 K/m) = 232.4444 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 232.4444 × 1 = 232.4444 W/m² (Watts per Square Meter) • kW/m²: 232.4444 × 0.001 = 0.2324 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 232.4444 × 0.317 = 73.6845 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 232.4444 × 2.3885 × 10⁻⁵ = 0.00555184 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 232.4444 × 0.001433 = 0.3332 Ly/min (Langley per Minute) • MW/m²: 232.4444 × 1 × 10⁻⁶ = 0.00023244 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 0.67151933 btu (it) feet/hour/sq. foot/°f (Btu·ft/(h·ft²·°F)) in 1 kilocalorie (th)/hour/meter/°c (kcal (th)/(h·m·°C)). To calculate larger amounts manually, simply multiply your total number of kilocalories (th)/hour/meter/°c by the conversion multiplier of 0.67151933.

The mathematical formula to convert kilocalories (th)/hour/meter/°c to btu (it) feet/hour/sq. foot/°f is: [value] * 0.67151933 = btu (it) feet/hour/sq. foot/°f. 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 btu (it) feet/hour/sq. foot/°f back to kilocalories (th)/hour/meter/°c, you must divide your starting value by 0.67151933. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (it) foot/hour/sq. foot/°f input field.

1 BTU (IT) foot/hour/sq. foot/°F is larger than 1 Kilocalorie (th)/hour/meter/°C. Specifically, 1 Kilocalorie (th)/hour/meter/°C equals 0.67151933 btu (it) feet/hour/sq. foot/°f, meaning 1 BTU (IT) foot/hour/sq. foot/°F is 1.4892 times larger than 1 Kilocalorie (th)/hour/meter/°C (a difference of 0.17 orders of magnitude). Expressing measurements in kilocalories (th)/hour/meter/°c requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Kilocalorie (th)/hour/meter/°C converts to 0.67151933 btu (it) feet/hour/sq. foot/°f. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.