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Calories (th)/second/cm/°C to Btu (it) Feet/hour/sq. foot/°F Converter (cal (th)/(s·cm·°C) to Btu·ft/(h·ft²·°F))

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Live Conversion • ISO 80000-5:2019 Certified
1 Calorie (th)/second/cm/°C = 241.74700344 BTU (IT) foot/hour/sq. foot/°F
1 cal (th)/(s·cm·°C) = 241.747003 Btu·ft/(h·ft²·°F) • 1 Btu·ft/(h·ft²·°F) = 0.00413656 cal (th)/(s·cm·°C)
Calorie (th)/second/cm/°C to BTU (IT) foot/hour/sq. foot/°F: One Calorie (th)/second/cm/°C is equal to 241.74700344 Btu (it) Feet/hour/sq. foot/°F.
Certified Authority Value
241.74700344
Btu·ft/(h·ft²·°F)
Exact: 1 Btu·ft/(h·ft²·°F) ≡ 0.004136555927 cal (th)/(s·cm·°C)
cal (th)/(s·cm·°C)
cal (th)/(s·cm·°C)
Swap to BTU (IT) foot/hour/sq. foot/°F to Calorie (th)/second/cm/°C
Swap to BTU (IT) foot/hour/sq. foot/°F to Calorie (th)/second/cm/°C
Btu·ft/(h·ft²·°F)
Btu·ft/(h·ft²·°F) 241.74700344
Quick Values:
Conversion Formula
To convert Calorie (th)/second/cm/°C to BTU (IT) foot/hour/sq. foot/°F, multiply by 241.74700344
cal (th)/(s·cm·°C) × 241.74700344 = Btu·ft/(h·ft²·°F)

Calculation: 1 cal (th)/(s·cm·°C) × 241.74700344 = 241.74700344 Btu·ft/(h·ft²·°F)

Common Calorie (th)/second/cm/°C to BTU (IT) foot/hour/sq. foot/°F Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)) and BTU (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)).

Tap any row to calculate
Calorie (th)/second/cm/°C to BTU (IT) foot/hour/sq. foot/°F: Primary Direct Table (15 Steps)
Calorie (th)/second/cm/°C to BTU (IT) foot/hour/sq. foot/°F Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 cal (th)/(s·cm·°C) 0.241747 Btu·ft/(h·ft²·°F) 2.417 × 10⁻¹
0.01 cal (th)/(s·cm·°C) 2.41747 Btu·ft/(h·ft²·°F) 2.417 × 10⁰
0.1 cal (th)/(s·cm·°C) 24.1747 Btu·ft/(h·ft²·°F) 2.417 × 10¹
0.5 cal (th)/(s·cm·°C) 120.873502 Btu·ft/(h·ft²·°F) 1.209 × 10²
1 cal (th)/(s·cm·°C) 241.747003 Btu·ft/(h·ft²·°F) 2.417 × 10²
2 cal (th)/(s·cm·°C) 483.494007 Btu·ft/(h·ft²·°F) 4.835 × 10²
5 cal (th)/(s·cm·°C) 1208.735017 Btu·ft/(h·ft²·°F) 1.209 × 10³
10 cal (th)/(s·cm·°C) 2417.470034 Btu·ft/(h·ft²·°F) 2.417 × 10³
20 cal (th)/(s·cm·°C) 4834.940069 Btu·ft/(h·ft²·°F) 4.835 × 10³
25 cal (th)/(s·cm·°C) 6043.675086 Btu·ft/(h·ft²·°F) 6.044 × 10³
50 cal (th)/(s·cm·°C) 12087.350172 Btu·ft/(h·ft²·°F) 1.209 × 10⁴
100 cal (th)/(s·cm·°C) 24174.700344 Btu·ft/(h·ft²·°F) 2.417 × 10⁴
250 cal (th)/(s·cm·°C) 60436.75086 Btu·ft/(h·ft²·°F) 6.044 × 10⁴
500 cal (th)/(s·cm·°C) 120873.50172 Btu·ft/(h·ft²·°F) 1.209 × 10⁵
1000 cal (th)/(s·cm·°C) 241747.003441 Btu·ft/(h·ft²·°F) 2.417 × 10⁵
BTU (IT) foot/hour/sq. foot/°F to Calorie (th)/second/cm/°C: Reciprocal Summary
BTU (IT) foot/hour/sq. foot/°F to Calorie (th)/second/cm/°C Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu·ft/(h·ft²·°F) 0.00413656 cal (th)/(s·cm·°C) 4.137 × 10⁻³
5 Btu·ft/(h·ft²·°F) 0.0206828 cal (th)/(s·cm·°C) 2.068 × 10⁻²
10 Btu·ft/(h·ft²·°F) 0.0413656 cal (th)/(s·cm·°C) 4.137 × 10⁻²
50 Btu·ft/(h·ft²·°F) 0.206828 cal (th)/(s·cm·°C) 2.068 × 10⁻¹
100 Btu·ft/(h·ft²·°F) 0.413656 cal (th)/(s·cm·°C) 4.137 × 10⁻¹
View Complete 15-Row BTU (IT) foot/hour/sq. foot/°F to Calorie (th)/second/cm/°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 Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)) and BTU (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)):

Calorie (th)/second/cm/°C References:

  • Stationary atmospheric dry air thermal conductivity at sea level 6.2E-5 cal (th)/(s·cm·°C)
  • Commercial fiberglass building insulation batt thermal conductivity 9.6E-5 cal (th)/(s·cm·°C)
  • Liquid drinking water thermal conductivity at room temperature 0.001434 cal (th)/(s·cm·°C)
  • Architectural structural concrete wall thermal conductivity 0.003585 cal (th)/(s·cm·°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 Calorie (th)/second/cm/°C to BTU (IT) foot/hour/sq. foot/°F

Converting Calorie (th)/second/cm/°C (cal (th)/(s·cm·°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 Calorie (th)/second/cm/°C equals 241.747003 BTU (IT) foot/hour/sq. foot/°F, while 1 Btu·ft/(h·ft²·°F) equals 0.00413656 cal (th)/(s·cm·°C).

Direct Factor1 cal (th)/(s·cm·°C) = 241.747003 Btu·ft/(h·ft²·°F)
Inverse Ratio1 Btu·ft/(h·ft²·°F) = 0.00413656 cal (th)/(s·cm·°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 cal (th)/(s·cm·°C) = 418.4 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 Calorie (th)/second/cm/°C → BTU (IT) foot/hour/sq. foot/°F:V(Btu·ft/(h·ft²·°F)) = V(cal (th)/(s·cm·°C)) × ( 418.4 / 1.730735 ) = V(cal (th)/(s·cm·°C)) × 241.747003
Mathematical FormulaValue in BTU (IT) foot/hour/sq. foot/°F = Value in Calorie (th)/second/cm/°C × 241.74700344Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 12 Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)) produces 2900.964041 BTU (IT) foot/hour/sq. foot/°F (Btu·ft/(h·ft²·°F)). In heavy-duty utility and industrial workloads, 240 cal (th)/(s·cm·°C) equals 58019.280826 Btu·ft/(h·ft²·°F).

Inverse check: 1 Btu·ft/(h·ft²·°F) = 0.00413656 cal (th)/(s·cm·°C).

Understanding Calorie (th)/second/cm/°C and BTU (IT) foot/hour/sq. foot/°F

Calorie (th)/second/cm/°C

cal (th)/(s·cm·°C)
Standard Unit

A Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)) is a recognized unit for thermal conductivity.

Applications & Practical Context

In practical thermal conductivity terms, a stationary atmospheric dry air thermal conductivity at sea level equals 6.2 × 10⁻⁵ cal (th)/(s·cm·°C), a commercial fiberglass building insulation batt thermal conductivity equals 9.6 × 10⁻⁵ cal (th)/(s·cm·°C), a liquid drinking water thermal conductivity at room temperature equals 0.001434 cal (th)/(s·cm·°C).

Physical Setup

A physical magnitude of 1 cal (th)/(s·cm·°C) corresponds to 418.4 W/(m·K) in standard SI measurement.

Conversion to SI Unit: watt per meter kelvin (W/(m·K))
1 cal (th)/(s·cm·°C) = 418.4 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 cal (th)/(s·cm·°C) at Insulated Wall Core (20K across 0.1m = 200 K/m) = 83680 W/m²
Equals 83.68 kW/m² • 26526.4258 BTU/(h·ft²) • 1.998662 cal/(s·cm²)
SI Heat Flux
83680
W/m²
Watts per Square Meter
Solar / Combustion
83.68
kW/m²
Kilowatts per Square Meter
US Building Envelope
26526.4258
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
1.998662
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
119.9413
Ly/min
Langley per Minute
Furnace Flux
0.08368
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m·K)):
    k = 1 cal (th)/(s·cm·°C) × 418.4 = 418.4 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 = (418.4 W/(m·K)) × (200 K/m) = 83680 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 83680 × 1 = 83680 W/m² (Watts per Square Meter) • kW/m²: 83680 × 0.001 = 83.68 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 83680 × 0.317 = 26526.4258 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 83680 × 2.3885 × 10⁻⁵ = 1.998662 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 83680 × 0.001433 = 119.9413 Ly/min (Langley per Minute) • MW/m²: 83680 × 1 × 10⁻⁶ = 0.08368 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 241.74700344 btu (it) feet/hour/sq. foot/°f (Btu·ft/(h·ft²·°F)) in 1 calorie (th)/second/cm/°c (cal (th)/(s·cm·°C)). To calculate larger amounts manually, simply multiply your total number of calories (th)/second/cm/°c by the conversion multiplier of 241.74700344.

The mathematical formula to convert calories (th)/second/cm/°c to btu (it) feet/hour/sq. foot/°f is: [value] * 241.74700344 = 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 calories (th)/second/cm/°c, you must divide your starting value by 241.74700344. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (it) foot/hour/sq. foot/°f input field.

1 Calorie (th)/second/cm/°C is larger than 1 BTU (IT) foot/hour/sq. foot/°F. Specifically, 1 Calorie (th)/second/cm/°C equals exactly 241.74700344 btu (it) feet/hour/sq. foot/°f, making it 241.747 times larger (a difference of 2.38 orders of magnitude). Therefore, quantities expressed in btu (it) feet/hour/sq. foot/°f require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 Calorie (th)/second/cm/°C converts to 241.74700344 btu (it) feet/hour/sq. foot/°f. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.