Kilocalories (th)/hour/meter/°C to Btus/hour/foot/°F Converter (kcal/(h·m·°C) to Btu/(h·ft·°F))

Rate this converter

Instant calculation with 0ms overhead

Popular Converters

Live Conversion • ISO 80000-5:2019 Certified

1 Kilocalorie/hour/meter/°C = 0.67196879 Btu/hour/foot/°F

1 kcal/(h·m·°C) = 0.671969 Btu/(h·ft·°F) • 1 Btu/(h·ft·°F) = 1.488164 kcal/(h·m·°C)

Decimals:

Certified Authority Value

0.67196879

Btu/(h·ft·°F)

From / Input

kcal/(h·m·°C)

Swap to Btu/hour/foot/°F to Kilocalorie/hour/meter/°C

To / Result

Btu/(h·ft·°F)

Quick Values:

Conversion Formula

To convert Kilocalorie/hour/meter/°C to Btu/hour/foot/°F, multiply by 0.67196879

kcal/(h·m·°C) × 0.67196879 = Btu/(h·ft·°F)

Calculation: 1 kcal/(h·m·°C) × 0.67196879 = 0.67196879 Btu/(h·ft·°F)

Common Kilocalorie/hour/meter/°C to Btu/hour/foot/°F Calculations

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

Tap any row to calculate

Kilocalorie/hour/meter/°C to Btu/hour/foot/°F: Primary Direct Table (15 Steps)

Rule: 1 Kilocalorie/hour/meter/°C is equal to 0.671969 Btu/(h·ft·°F) (Btu/hour/foot/°F)

Kilocalorie/hour/meter/°C to Btu/hour/foot/°F Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 kcal/(h·m·°C) 0.000671969 Btu/(h·ft·°F)	6.72 × 10⁻⁴
0.01 kcal/(h·m·°C) 0.00671969 Btu/(h·ft·°F)	6.72 × 10⁻³
0.1 kcal/(h·m·°C) 0.0671969 Btu/(h·ft·°F)	6.72 × 10⁻²
0.5 kcal/(h·m·°C) 0.335984 Btu/(h·ft·°F)	3.36 × 10⁻¹
1 kcal/(h·m·°C) 0.671969 Btu/(h·ft·°F)	6.72 × 10⁻¹
2 kcal/(h·m·°C) 1.343938 Btu/(h·ft·°F)	1.344 × 10⁰
5 kcal/(h·m·°C) 3.359844 Btu/(h·ft·°F)	3.36 × 10⁰
10 kcal/(h·m·°C) 6.719688 Btu/(h·ft·°F)	6.72 × 10⁰
20 kcal/(h·m·°C) 13.439376 Btu/(h·ft·°F)	1.344 × 10¹
25 kcal/(h·m·°C) 16.79922 Btu/(h·ft·°F)	1.68 × 10¹
50 kcal/(h·m·°C) 33.598439 Btu/(h·ft·°F)	3.36 × 10¹
100 kcal/(h·m·°C) 67.196879 Btu/(h·ft·°F)	6.72 × 10¹
250 kcal/(h·m·°C) 167.992196 Btu/(h·ft·°F)	1.68 × 10²
500 kcal/(h·m·°C) 335.984393 Btu/(h·ft·°F)	3.36 × 10²
1000 kcal/(h·m·°C) 671.968785 Btu/(h·ft·°F)	6.72 × 10²

Btu/hour/foot/°F to Kilocalorie/hour/meter/°C: Reciprocal Summary

Rule: 1 Btu/hour/foot/°F is equal to 1.488164 kcal/(h·m·°C) (Kilocalorie/hour/meter/°C)

Btu/hour/foot/°F to Kilocalorie/hour/meter/°C Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 Btu/(h·ft·°F) 1.488164 kcal/(h·m·°C)	1.488 × 10⁰
5 Btu/(h·ft·°F) 7.440822 kcal/(h·m·°C)	7.441 × 10⁰
10 Btu/(h·ft·°F) 14.881644 kcal/(h·m·°C)	1.488 × 10¹
50 Btu/(h·ft·°F) 74.408218 kcal/(h·m·°C)	7.441 × 10¹
100 Btu/(h·ft·°F) 148.816436 kcal/(h·m·°C)	1.488 × 10²

View Complete 15-Row Btu/hour/foot/°F to Kilocalorie/hour/meter/°C Table

Real-World Context & Everyday Benchmarks

Tap to load into converter

To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Kilocalorie/hour/meter/°C (kcal/(h·m·°C)) and Btu/hour/foot/°F (Btu/(h·ft·°F)):

Kilocalorie/hour/meter/°C References:

Stationary atmospheric dry air thermal conductivity at sea level 0.022356 kcal/(h·m·°C)
Commercial fiberglass building insulation batt thermal conductivity 0.034394 kcal/(h·m·°C)
Liquid drinking water thermal conductivity at room temperature 0.515907 kcal/(h·m·°C)
Architectural structural concrete wall thermal conductivity 1.2898 kcal/(h·m·°C)

Btu/hour/foot/°F References:

Stationary atmospheric dry air thermal conductivity at sea level 0.015023 Btu/(h·ft·°F)
Commercial fiberglass building insulation batt thermal conductivity 0.023112 Btu/(h·ft·°F)
Liquid drinking water thermal conductivity at room temperature 0.346673 Btu/(h·ft·°F)
Architectural structural concrete wall thermal conductivity 0.866684 Btu/(h·ft·°F)

Tap any benchmark above to automatically calculate its exact equivalent in Btu/hour/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/hour/meter/°C to Btu/hour/foot/°F

Converting Kilocalorie/hour/meter/°C (kcal/(h·m·°C)) to Btu/hour/foot/°F (Btu/(h·ft·°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/hour/meter/°C equals 0.671969 Btu/hour/foot/°F, while 1 Btu/(h·ft·°F) equals 1.488164 kcal/(h·m·°C).

Direct Factor1 kcal/(h·m·°C) = 0.671969 Btu/(h·ft·°F)

Inverse Ratio1 Btu/(h·ft·°F) = 1.488164 kcal/(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:

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 (k_source):1 kcal/(h·m·°C) = 1.163 watt per meter kelvin (W/(m·K))

2. Target SI Bridge (k_target):1 Btu/(h·ft·°F) = 1.730736 watt per meter kelvin (W/(m·K))

Step-by-step substitution for Kilocalorie/hour/meter/°C → Btu/hour/foot/°F:V(Btu/(h·ft·°F)) = V(kcal/(h·m·°C)) × ( 1.163 / 1.730736 ) = V(kcal/(h·m·°C)) × 0.671969

Mathematical FormulaValue in Btu/hour/foot/°F = Value in Kilocalorie/hour/meter/°C × 0.67196879Direct computational formula applied for standard conversion.

Worked Example

To convert 24 Kilocalorie/hour/meter/°C (kcal/(h·m·°C)) to Btu/hour/foot/°F (Btu/(h·ft·°F)): multiply 24 by 0.671969 to get 16.127251 Btu/(h·ft·°F). At an industrial engineering scale, 5000 kcal/(h·m·°C) converts to 3359.843925 Btu/(h·ft·°F).

Inverse check: 1 Btu/(h·ft·°F) = 1.488164 kcal/(h·m·°C).

Understanding Kilocalorie/hour/meter/°C and Btu/hour/foot/°F

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].

Input Thermal Conductivity (k): kcal/(h·m·°C)

Select Temperature Gradient Through Wall (ΔT / L): 200 K/m

Governing Law: q" = k × ∇T

Vector: [W/(m·K)] × [K/m] → [W/m²]

Live Calculated Bridge Equivalent:

1 kcal/(h·m·°C) at Insulated Wall Core (20K across 0.1m = 200 K/m) = 232.6001 W/m²

Equals 0.2326 kW/m² • 73.7338 BTU/(h·ft²) • 0.00555556 cal/(s·cm²)

SI Heat Flux

232.6001

W/m²

Watts per Square Meter

Solar / Combustion

0.2326

kW/m²

Kilowatts per Square Meter

US Building Envelope

73.7338

BTU/(h·ft²)

BTU per Hour Sq. Foot

CGS Thermal

0.00555556

cal/(s·cm²)

Calories per Second Sq. Cm

Meteorology

0.3334

Ly/min

Langley per Minute

Furnace Flux

0.0002326

MW/m²

Megawatts per Square Meter

Step-by-Step Numerical Derivation Proof View Derivation

1. Normalize Input to SI Base Unit (W/(m·K)):
k = 1 kcal/(h·m·°C) × 1.16300031 = 1.16300031 W/(m·K)
2. Apply Engineering Parameter (∇T):
Selected condition: Insulated Wall Core (20K across 0.1m = 200 K/m) at ∇T = 200 K/m
3. Execute Governing Physical Law in SI Units:
q" = k × ∇T = (1.16300031 W/(m·K)) × (200 K/m) = 232.600062 W/m²
4. Convert to Standard Engineering Units:
• W/m²: 232.600062 × 1 = 232.6001 W/m² (Watts per Square Meter) • kW/m²: 232.600062 × 0.001 = 0.2326 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 232.600062 × 0.317 = 73.7338 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 232.600062 × 2.3885 × 10⁻⁵ = 0.00555556 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 232.600062 × 0.001433 = 0.3334 Ly/min (Langley per Minute) • MW/m²: 232.600062 × 1 × 10⁻⁶ = 0.0002326 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

Frequently Asked Questions

There are exactly 0.67196879 btus/hour/foot/°f (Btu/(h·ft·°F)) in 1 kilocalorie/hour/meter/°c (kcal/(h·m·°C)). To calculate larger amounts manually, simply multiply your total number of kilocalories (th)/hour/meter/°c by the conversion multiplier of 0.67196879.

The mathematical formula to convert kilocalories (th)/hour/meter/°c to btus/hour/foot/°f is: [value] * 0.67196879 = btus/hour/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 btus/hour/foot/°f back to kilocalories (th)/hour/meter/°c, you must divide your starting value by 0.67196879. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu/hour/foot/°f input field.

1 Btu/hour/foot/°F is larger than 1 Kilocalorie/hour/meter/°C. Specifically, 1 Kilocalorie/hour/meter/°C equals 0.67196879 btus/hour/foot/°f, meaning 1 Btu/hour/foot/°F is 1.4882 times larger than 1 Kilocalorie/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/hour/meter/°C converts to 0.67196879 btus/hour/foot/°f. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.