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Calories (it)/second/cm/°C to Btu (th) Inches/second/sq. foot/°F Converter (cal/(s·cm·°C) to Btu (th)·in/(s·ft²·°F))

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Live Conversion • ISO 80000-5:2019 Certified
1 Calorie (IT)/second/cm/°C = 0.80690234 BTU (th) inch/second/sq. foot/°F
1 cal/(s·cm·°C) = 0.806902 Btu (th)·in/(s·ft²·°F) • 1 Btu (th)·in/(s·ft²·°F) = 1.239307 cal/(s·cm·°C)
Calorie (IT)/second/cm/°C to BTU (th) inch/second/sq. foot/°F: One Calorie (IT)/second/cm/°C is equal to 0.80690234 Btu (th) Inches/second/sq. foot/°F.
Certified Authority Value
0.80690234
Btu (th)·in/(s·ft²·°F)
Exact: 1 Btu (th)·in/(s·ft²·°F) ≡ 1.2393073469 cal/(s·cm·°C)
cal/(s·cm·°C)
cal/(s·cm·°C)
Swap to BTU (th) inch/second/sq. foot/°F to Calorie (IT)/second/cm/°C
Swap to BTU (th) inch/second/sq. foot/°F to Calorie (IT)/second/cm/°C
Btu (th)·in/(s·ft²·°F)
Btu (th)·in/(s·ft²·°F) 0.80690234
Quick Values:
Conversion Formula
To convert Calorie (IT)/second/cm/°C to BTU (th) inch/second/sq. foot/°F, multiply by 0.80690234
cal/(s·cm·°C) × 0.80690234 = Btu (th)·in/(s·ft²·°F)

Calculation: 1 cal/(s·cm·°C) × 0.80690234 = 0.80690234 Btu (th)·in/(s·ft²·°F)

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

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

Tap any row to calculate
Calorie (IT)/second/cm/°C to BTU (th) inch/second/sq. foot/°F: Primary Direct Table (15 Steps)
Calorie (IT)/second/cm/°C to BTU (th) inch/second/sq. foot/°F Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 cal/(s·cm·°C) 0.000806902 Btu (th)·in/(s·ft²·°F) 8.069 × 10⁻⁴
0.01 cal/(s·cm·°C) 0.00806902 Btu (th)·in/(s·ft²·°F) 8.069 × 10⁻³
0.1 cal/(s·cm·°C) 0.0806902 Btu (th)·in/(s·ft²·°F) 8.069 × 10⁻²
0.5 cal/(s·cm·°C) 0.403451 Btu (th)·in/(s·ft²·°F) 4.035 × 10⁻¹
1 cal/(s·cm·°C) 0.806902 Btu (th)·in/(s·ft²·°F) 8.069 × 10⁻¹
2 cal/(s·cm·°C) 1.613805 Btu (th)·in/(s·ft²·°F) 1.614 × 10⁰
5 cal/(s·cm·°C) 4.034512 Btu (th)·in/(s·ft²·°F) 4.035 × 10⁰
10 cal/(s·cm·°C) 8.069023 Btu (th)·in/(s·ft²·°F) 8.069 × 10⁰
20 cal/(s·cm·°C) 16.138047 Btu (th)·in/(s·ft²·°F) 1.614 × 10¹
25 cal/(s·cm·°C) 20.172559 Btu (th)·in/(s·ft²·°F) 2.017 × 10¹
50 cal/(s·cm·°C) 40.345117 Btu (th)·in/(s·ft²·°F) 4.035 × 10¹
100 cal/(s·cm·°C) 80.690234 Btu (th)·in/(s·ft²·°F) 8.069 × 10¹
250 cal/(s·cm·°C) 201.725585 Btu (th)·in/(s·ft²·°F) 2.017 × 10²
500 cal/(s·cm·°C) 403.451171 Btu (th)·in/(s·ft²·°F) 4.035 × 10²
1000 cal/(s·cm·°C) 806.902341 Btu (th)·in/(s·ft²·°F) 8.069 × 10²
BTU (th) inch/second/sq. foot/°F to Calorie (IT)/second/cm/°C: Reciprocal Summary
BTU (th) inch/second/sq. foot/°F to Calorie (IT)/second/cm/°C Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu (th)·in/(s·ft²·°F) 1.239307 cal/(s·cm·°C) 1.239 × 10⁰
5 Btu (th)·in/(s·ft²·°F) 6.196537 cal/(s·cm·°C) 6.197 × 10⁰
10 Btu (th)·in/(s·ft²·°F) 12.393073 cal/(s·cm·°C) 1.239 × 10¹
50 Btu (th)·in/(s·ft²·°F) 61.965367 cal/(s·cm·°C) 6.197 × 10¹
100 Btu (th)·in/(s·ft²·°F) 123.930735 cal/(s·cm·°C) 1.239 × 10²
View Complete 15-Row BTU (th) inch/second/sq. foot/°F to Calorie (IT)/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 (IT)/second/cm/°C (cal/(s·cm·°C)) and BTU (th) inch/second/sq. foot/°F (Btu (th)·in/(s·ft²·°F)):

Calorie (IT)/second/cm/°C References:

  • Stationary atmospheric dry air thermal conductivity at sea level 6.2E-5 cal/(s·cm·°C)
  • Commercial fiberglass building insulation batt thermal conductivity 9.6E-5 cal/(s·cm·°C)
  • Liquid drinking water thermal conductivity at room temperature 0.001433 cal/(s·cm·°C)
  • Architectural structural concrete wall thermal conductivity 0.003583 cal/(s·cm·°C)

BTU (th) inch/second/sq. foot/°F References:

  • Stationary atmospheric dry air thermal conductivity at sea level 5.0E-5 Btu (th)·in/(s·ft²·°F)
  • Commercial fiberglass building insulation batt thermal conductivity 7.7E-5 Btu (th)·in/(s·ft²·°F)
  • Liquid drinking water thermal conductivity at room temperature 0.001156 Btu (th)·in/(s·ft²·°F)
  • Architectural structural concrete wall thermal conductivity 0.002891 Btu (th)·in/(s·ft²·°F)

Tap any benchmark above to automatically calculate its exact equivalent in BTU (th) inch/second/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 (IT)/second/cm/°C to BTU (th) inch/second/sq. foot/°F

Converting Calorie (IT)/second/cm/°C (cal/(s·cm·°C)) to BTU (th) inch/second/sq. foot/°F (Btu (th)·in/(s·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 (IT)/second/cm/°C equals 0.806902 BTU (th) inch/second/sq. foot/°F, while 1 Btu (th)·in/(s·ft²·°F) equals 1.239307 cal/(s·cm·°C).

Direct Factor1 cal/(s·cm·°C) = 0.806902 Btu (th)·in/(s·ft²·°F)
Inverse Ratio1 Btu (th)·in/(s·ft²·°F) = 1.239307 cal/(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/(s·cm·°C) = 418.68 watt per meter kelvin (W/(m·K))
2. Target SI Bridge (ktarget):1 Btu (th)·in/(s·ft²·°F) = 518.8732 watt per meter kelvin (W/(m·K))
Step-by-step substitution for Calorie (IT)/second/cm/°C → BTU (th) inch/second/sq. foot/°F:V(Btu (th)·in/(s·ft²·°F)) = V(cal/(s·cm·°C)) × ( 418.68 / 518.8732 ) = V(cal/(s·cm·°C)) × 0.806902
Mathematical FormulaValue in BTU (th) inch/second/sq. foot/°F = Value in Calorie (IT)/second/cm/°C × 0.80690234Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 2.5 Calorie (IT)/second/cm/°C (cal/(s·cm·°C)) produces 2.017256 BTU (th) inch/second/sq. foot/°F (Btu (th)·in/(s·ft²·°F)). In heavy-duty utility and industrial workloads, 10000 cal/(s·cm·°C) equals 8069.023415 Btu (th)·in/(s·ft²·°F).

Inverse check: 1 Btu (th)·in/(s·ft²·°F) = 1.239307 cal/(s·cm·°C).

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

Calorie (IT)/second/cm/°C

cal/(s·cm·°C)
Standard Unit

A Calorie (IT)/second/cm/°C (cal/(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/(s·cm·°C), a commercial fiberglass building insulation batt thermal conductivity equals 9.6 × 10⁻⁵ cal/(s·cm·°C), a liquid drinking water thermal conductivity at room temperature equals 0.001433 cal/(s·cm·°C).

Physical Setup

A physical magnitude of 1 cal/(s·cm·°C) corresponds to 418.68 W/(m·K) in standard SI measurement.

Conversion to SI Unit: watt per meter kelvin (W/(m·K))
1 cal/(s·cm·°C) = 418.68 W/(m·K)

BTU (th) inch/second/sq. foot/°F

Btu (th)·in/(s·ft²·°F)
Imperial / US

A BTU (th) inch/second/sq. foot/°F (Btu (th)·in/(s·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 5 × 10⁻⁵ Btu (th)·in/(s·ft²·°F), a commercial fiberglass building insulation batt thermal conductivity equals 7.7 × 10⁻⁵ Btu (th)·in/(s·ft²·°F), a liquid drinking water thermal conductivity at room temperature equals 0.001156 Btu (th)·in/(s·ft²·°F).

Physical Setup

A physical magnitude of 1 Btu (th)·in/(s·ft²·°F) corresponds to 518.8732 W/(m·K) in standard SI measurement.

Conversion to SI Unit: watt per meter kelvin (W/(m·K))
1 Btu (th)·in/(s·ft²·°F) = 518.8732 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/(s·cm·°C) at Insulated Wall Core (20K across 0.1m = 200 K/m) = 83736 W/m²
Equals 83.736 kW/m² • 26544.1777 BTU/(h·ft²) • 2 cal/(s·cm²)
SI Heat Flux
83736
W/m²
Watts per Square Meter
Solar / Combustion
83.736
kW/m²
Kilowatts per Square Meter
US Building Envelope
26544.1777
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
2
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
120.0216
Ly/min
Langley per Minute
Furnace Flux
0.083736
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m·K)):
    k = 1 cal/(s·cm·°C) × 418.68 = 418.68 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 = (418.68 W/(m·K)) × (200 K/m) = 83736 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 83736 × 1 = 83736 W/m² (Watts per Square Meter) • kW/m²: 83736 × 0.001 = 83.736 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 83736 × 0.317 = 26544.1777 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 83736 × 2.3885 × 10⁻⁵ = 2 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 83736 × 0.001433 = 120.0216 Ly/min (Langley per Minute) • MW/m²: 83736 × 1 × 10⁻⁶ = 0.083736 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 0.80690234 btu (th) inches/second/sq. foot/°f (Btu (th)·in/(s·ft²·°F)) in 1 calorie (it)/second/cm/°c (cal/(s·cm·°C)). To calculate larger amounts manually, simply multiply your total number of calories (it)/second/cm/°c by the conversion multiplier of 0.80690234.

The mathematical formula to convert calories (it)/second/cm/°c to btu (th) inches/second/sq. foot/°f is: [value] * 0.80690234 = btu (th) inches/second/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 (th) inches/second/sq. foot/°f back to calories (it)/second/cm/°c, you must divide your starting value by 0.80690234. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (th) inch/second/sq. foot/°f input field.

1 BTU (th) inch/second/sq. foot/°F is larger than 1 Calorie (IT)/second/cm/°C. Specifically, 1 Calorie (IT)/second/cm/°C equals 0.80690234 btu (th) inches/second/sq. foot/°f, meaning 1 BTU (th) inch/second/sq. foot/°F is 1.2393 times larger than 1 Calorie (IT)/second/cm/°C (a difference of 0.09 orders of magnitude). Expressing measurements in calories (it)/second/cm/°c requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Calorie (IT)/second/cm/°C converts to 0.80690234 btu (th) inches/second/sq. foot/°f. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.