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

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Live Conversion • ISO 80000-5:2019 Certified
1 Calorie (th)/second/cm/°C = 0.8058235 BTU (IT) inch/second/sq. foot/°F
1 cal (th)/(s·cm·°C) = 0.805824 Btu·in/(s·ft²·°F) • 1 Btu·in/(s·ft²·°F) = 1.240967 cal (th)/(s·cm·°C)
Calorie (th)/second/cm/°C to BTU (IT) inch/second/sq. foot/°F: One Calorie (th)/second/cm/°C is equal to 0.8058235 Btu (it) Inches/second/sq. foot/°F.
Certified Authority Value
0.80582350
Btu·in/(s·ft²·°F)
Exact: 1 Btu·in/(s·ft²·°F) ≡ 1.2409665392 cal (th)/(s·cm·°C)
cal (th)/(s·cm·°C)
cal (th)/(s·cm·°C)
Swap to BTU (IT) inch/second/sq. foot/°F to Calorie (th)/second/cm/°C
Swap to BTU (IT) inch/second/sq. foot/°F to Calorie (th)/second/cm/°C
Btu·in/(s·ft²·°F)
Btu·in/(s·ft²·°F) 0.8058235
Quick Values:
Conversion Formula
To convert Calorie (th)/second/cm/°C to BTU (IT) inch/second/sq. foot/°F, multiply by 0.8058235
cal (th)/(s·cm·°C) × 0.8058235 = Btu·in/(s·ft²·°F)

Calculation: 1 cal (th)/(s·cm·°C) × 0.8058235 = 0.8058235 Btu·in/(s·ft²·°F)

Common Calorie (th)/second/cm/°C to BTU (IT) inch/second/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) inch/second/sq. foot/°F (Btu·in/(s·ft²·°F)).

Tap any row to calculate
Calorie (th)/second/cm/°C to BTU (IT) inch/second/sq. foot/°F: Primary Direct Table (15 Steps)
Calorie (th)/second/cm/°C to BTU (IT) inch/second/sq. foot/°F Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 cal (th)/(s·cm·°C) 0.000805824 Btu·in/(s·ft²·°F) 8.058 × 10⁻⁴
0.01 cal (th)/(s·cm·°C) 0.00805824 Btu·in/(s·ft²·°F) 8.058 × 10⁻³
0.1 cal (th)/(s·cm·°C) 0.0805824 Btu·in/(s·ft²·°F) 8.058 × 10⁻²
0.5 cal (th)/(s·cm·°C) 0.402912 Btu·in/(s·ft²·°F) 4.029 × 10⁻¹
1 cal (th)/(s·cm·°C) 0.805824 Btu·in/(s·ft²·°F) 8.058 × 10⁻¹
2 cal (th)/(s·cm·°C) 1.611647 Btu·in/(s·ft²·°F) 1.612 × 10⁰
5 cal (th)/(s·cm·°C) 4.029118 Btu·in/(s·ft²·°F) 4.029 × 10⁰
10 cal (th)/(s·cm·°C) 8.058235 Btu·in/(s·ft²·°F) 8.058 × 10⁰
20 cal (th)/(s·cm·°C) 16.11647 Btu·in/(s·ft²·°F) 1.612 × 10¹
25 cal (th)/(s·cm·°C) 20.145588 Btu·in/(s·ft²·°F) 2.015 × 10¹
50 cal (th)/(s·cm·°C) 40.291175 Btu·in/(s·ft²·°F) 4.029 × 10¹
100 cal (th)/(s·cm·°C) 80.58235 Btu·in/(s·ft²·°F) 8.058 × 10¹
250 cal (th)/(s·cm·°C) 201.455875 Btu·in/(s·ft²·°F) 2.015 × 10²
500 cal (th)/(s·cm·°C) 402.91175 Btu·in/(s·ft²·°F) 4.029 × 10²
1000 cal (th)/(s·cm·°C) 805.8235 Btu·in/(s·ft²·°F) 8.058 × 10²
BTU (IT) inch/second/sq. foot/°F to Calorie (th)/second/cm/°C: Reciprocal Summary
BTU (IT) inch/second/sq. foot/°F to Calorie (th)/second/cm/°C Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu·in/(s·ft²·°F) 1.240967 cal (th)/(s·cm·°C) 1.241 × 10⁰
5 Btu·in/(s·ft²·°F) 6.204833 cal (th)/(s·cm·°C) 6.205 × 10⁰
10 Btu·in/(s·ft²·°F) 12.409665 cal (th)/(s·cm·°C) 1.241 × 10¹
50 Btu·in/(s·ft²·°F) 62.048327 cal (th)/(s·cm·°C) 6.205 × 10¹
100 Btu·in/(s·ft²·°F) 124.096654 cal (th)/(s·cm·°C) 1.241 × 10²
View Complete 15-Row BTU (IT) inch/second/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) inch/second/sq. foot/°F (Btu·in/(s·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) inch/second/sq. foot/°F References:

  • Stationary atmospheric dry air thermal conductivity at sea level 5.0E-5 Btu·in/(s·ft²·°F)
  • Commercial fiberglass building insulation batt thermal conductivity 7.7E-5 Btu·in/(s·ft²·°F)
  • Liquid drinking water thermal conductivity at room temperature 0.001156 Btu·in/(s·ft²·°F)
  • Architectural structural concrete wall thermal conductivity 0.002889 Btu·in/(s·ft²·°F)

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

Converting Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)) to BTU (IT) inch/second/sq. foot/°F (Btu·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 (th)/second/cm/°C equals 0.805824 BTU (IT) inch/second/sq. foot/°F, while 1 Btu·in/(s·ft²·°F) equals 1.240967 cal (th)/(s·cm·°C).

Direct Factor1 cal (th)/(s·cm·°C) = 0.805824 Btu·in/(s·ft²·°F)
Inverse Ratio1 Btu·in/(s·ft²·°F) = 1.240967 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·in/(s·ft²·°F) = 519.2204 watt per meter kelvin (W/(m·K))
Step-by-step substitution for Calorie (th)/second/cm/°C → BTU (IT) inch/second/sq. foot/°F:V(Btu·in/(s·ft²·°F)) = V(cal (th)/(s·cm·°C)) × ( 418.4 / 519.2204 ) = V(cal (th)/(s·cm·°C)) × 0.805824
Mathematical FormulaValue in BTU (IT) inch/second/sq. foot/°F = Value in Calorie (th)/second/cm/°C × 0.8058235Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 2.5 Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)) produces 2.014559 BTU (IT) inch/second/sq. foot/°F (Btu·in/(s·ft²·°F)). In heavy-duty utility and industrial workloads, 240 cal (th)/(s·cm·°C) equals 193.39764 Btu·in/(s·ft²·°F).

Inverse check: 1 Btu·in/(s·ft²·°F) = 1.240967 cal (th)/(s·cm·°C).

Understanding Calorie (th)/second/cm/°C and BTU (IT) inch/second/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) 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 stationary atmospheric dry air thermal conductivity at sea level equals 5 × 10⁻⁵ Btu·in/(s·ft²·°F), a commercial fiberglass building insulation batt thermal conductivity equals 7.7 × 10⁻⁵ Btu·in/(s·ft²·°F), a liquid drinking water thermal conductivity at room temperature equals 0.001156 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)

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 0.8058235 btu (it) inches/second/sq. foot/°f (Btu·in/(s·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 0.8058235.

The mathematical formula to convert calories (th)/second/cm/°c to btu (it) inches/second/sq. foot/°f is: [value] * 0.8058235 = btu (it) 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 (it) inches/second/sq. foot/°f back to calories (th)/second/cm/°c, you must divide your starting value by 0.8058235. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (it) inch/second/sq. foot/°f input field.

1 BTU (IT) inch/second/sq. foot/°F is larger than 1 Calorie (th)/second/cm/°C. Specifically, 1 Calorie (th)/second/cm/°C equals 0.8058235 btu (it) inches/second/sq. foot/°f, meaning 1 BTU (IT) inch/second/sq. foot/°F is 1.241 times larger than 1 Calorie (th)/second/cm/°C (a difference of 0.09 orders of magnitude). Expressing measurements in calories (th)/second/cm/°c requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Calorie (th)/second/cm/°C converts to 0.8058235 btu (it) inches/second/sq. foot/°f. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.