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

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Live Conversion • ISO 80000-5:2019 Certified
1 BTU (IT) inch/hour/sq. foot/°F = 0.00034471295 Calorie (th)/second/cm/°C
1 Btu·in/(h·ft²·°F) = 0.000344713 cal (th)/(s·cm·°C) • 1 cal (th)/(s·cm·°C) = 2900.964377 Btu·in/(h·ft²·°F)
BTU (IT) inch/hour/sq. foot/°F to Calorie (th)/second/cm/°C: One BTU (IT) inch/hour/sq. foot/°F is equal to 0.00034471295 Calories (th)/second/cm/°C.
Certified Authority Value
0.00034471
cal (th)/(s·cm·°C)
Exact: 1 cal (th)/(s·cm·°C) ≡ 2900.964376518 Btu·in/(h·ft²·°F)
Btu·in/(h·ft²·°F)
Btu·in/(h·ft²·°F)
Swap to Calorie (th)/second/cm/°C to BTU (IT) inch/hour/sq. foot/°F
Swap to Calorie (th)/second/cm/°C to BTU (IT) inch/hour/sq. foot/°F
cal (th)/(s·cm·°C)
cal (th)/(s·cm·°C) 0.00034471295
Quick Values:
Conversion Formula
To convert BTU (IT) inch/hour/sq. foot/°F to Calorie (th)/second/cm/°C, multiply by 0.00034471295
Btu·in/(h·ft²·°F) × 0.00034471295 = cal (th)/(s·cm·°C)

Calculation: 1 Btu·in/(h·ft²·°F) × 0.00034471295 = 0.00034471295 cal (th)/(s·cm·°C)

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

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

Tap any row to calculate
BTU (IT) inch/hour/sq. foot/°F to Calorie (th)/second/cm/°C: Primary Direct Table (15 Steps)
BTU (IT) inch/hour/sq. foot/°F to Calorie (th)/second/cm/°C Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 Btu·in/(h·ft²·°F) 3.44713 × 10⁻⁷ cal (th)/(s·cm·°C) 3.447 × 10⁻⁷
0.01 Btu·in/(h·ft²·°F) 3.44713 × 10⁻⁶ cal (th)/(s·cm·°C) 3.447 × 10⁻⁶
0.1 Btu·in/(h·ft²·°F) 3.44713 × 10⁻⁵ cal (th)/(s·cm·°C) 3.447 × 10⁻⁵
0.5 Btu·in/(h·ft²·°F) 0.000172356 cal (th)/(s·cm·°C) 1.724 × 10⁻⁴
1 Btu·in/(h·ft²·°F) 0.000344713 cal (th)/(s·cm·°C) 3.447 × 10⁻⁴
2 Btu·in/(h·ft²·°F) 0.000689426 cal (th)/(s·cm·°C) 6.894 × 10⁻⁴
5 Btu·in/(h·ft²·°F) 0.00172356 cal (th)/(s·cm·°C) 1.724 × 10⁻³
10 Btu·in/(h·ft²·°F) 0.00344713 cal (th)/(s·cm·°C) 3.447 × 10⁻³
20 Btu·in/(h·ft²·°F) 0.00689426 cal (th)/(s·cm·°C) 6.894 × 10⁻³
25 Btu·in/(h·ft²·°F) 0.00861782 cal (th)/(s·cm·°C) 8.618 × 10⁻³
50 Btu·in/(h·ft²·°F) 0.0172356 cal (th)/(s·cm·°C) 1.724 × 10⁻²
100 Btu·in/(h·ft²·°F) 0.0344713 cal (th)/(s·cm·°C) 3.447 × 10⁻²
250 Btu·in/(h·ft²·°F) 0.0861782 cal (th)/(s·cm·°C) 8.618 × 10⁻²
500 Btu·in/(h·ft²·°F) 0.172356 cal (th)/(s·cm·°C) 1.724 × 10⁻¹
1000 Btu·in/(h·ft²·°F) 0.344713 cal (th)/(s·cm·°C) 3.447 × 10⁻¹
Calorie (th)/second/cm/°C to BTU (IT) inch/hour/sq. foot/°F: Reciprocal Summary
Calorie (th)/second/cm/°C to BTU (IT) inch/hour/sq. foot/°F Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 cal (th)/(s·cm·°C) 2900.964377 Btu·in/(h·ft²·°F) 2.901 × 10³
5 cal (th)/(s·cm·°C) 14504.821883 Btu·in/(h·ft²·°F) 1.45 × 10⁴
10 cal (th)/(s·cm·°C) 29009.643765 Btu·in/(h·ft²·°F) 2.901 × 10⁴
50 cal (th)/(s·cm·°C) 145048.218826 Btu·in/(h·ft²·°F) 1.45 × 10⁵
100 cal (th)/(s·cm·°C) 290096.437652 Btu·in/(h·ft²·°F) 2.901 × 10⁵
View Complete 15-Row Calorie (th)/second/cm/°C to BTU (IT) inch/hour/sq. foot/°F 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 BTU (IT) inch/hour/sq. foot/°F (Btu·in/(h·ft²·°F)) and Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)):

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

  • Stationary atmospheric dry air thermal conductivity at sea level 0.18027 Btu·in/(h·ft²·°F)
  • Commercial fiberglass building insulation batt thermal conductivity 0.277339 Btu·in/(h·ft²·°F)
  • Liquid drinking water thermal conductivity at room temperature 4.1601 Btu·in/(h·ft²·°F)
  • Architectural structural concrete wall thermal conductivity 10.4002 Btu·in/(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)

Tap any benchmark above to automatically calculate its exact equivalent in Calorie (th)/second/cm/°C.

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

How to Convert BTU (IT) inch/hour/sq. foot/°F to Calorie (th)/second/cm/°C

Converting BTU (IT) inch/hour/sq. foot/°F (Btu·in/(h·ft²·°F)) to Calorie (th)/second/cm/°C (cal (th)/(s·cm·°C)) 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 BTU (IT) inch/hour/sq. foot/°F equals 0.000344713 Calorie (th)/second/cm/°C, while 1 cal (th)/(s·cm·°C) equals 2900.964377 Btu·in/(h·ft²·°F).

Direct Factor1 Btu·in/(h·ft²·°F) = 0.000344713 cal (th)/(s·cm·°C)
Inverse Ratio1 cal (th)/(s·cm·°C) = 2900.964377 Btu·in/(h·ft²·°F)
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 Btu·in/(h·ft²·°F) = 0.144228 watt per meter kelvin (W/(m·K))
2. Target SI Bridge (ktarget):1 cal (th)/(s·cm·°C) = 418.4 watt per meter kelvin (W/(m·K))
Step-by-step substitution for BTU (IT) inch/hour/sq. foot/°F → Calorie (th)/second/cm/°C:V(cal (th)/(s·cm·°C)) = V(Btu·in/(h·ft²·°F)) × ( 0.144228 / 418.4 ) = V(Btu·in/(h·ft²·°F)) × 0.000344713
Mathematical FormulaValue in Calorie (th)/second/cm/°C = Value in BTU (IT) inch/hour/sq. foot/°F × 0.00034471295Direct computational formula applied for standard conversion.
Worked Example

Converting 8 Btu·in/(h·ft²·°F) yields an exact output of 0.0027577 cal (th)/(s·cm·°C) in Calorie (th)/second/cm/°C. Under higher industrial throughput, 100 Btu·in/(h·ft²·°F) translates to 0.0344713 cal (th)/(s·cm·°C).

Inverse check: 1 cal (th)/(s·cm·°C) = 2900.964377 Btu·in/(h·ft²·°F).

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

BTU (IT) inch/hour/sq. foot/°F

Btu·in/(h·ft²·°F)
Imperial / US

A BTU (IT) inch/hour/sq. foot/°F (Btu·in/(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 0.18027 Btu·in/(h·ft²·°F), a commercial fiberglass building insulation batt thermal conductivity equals 0.277339 Btu·in/(h·ft²·°F), a liquid drinking water thermal conductivity at room temperature equals 4.1601 Btu·in/(h·ft²·°F).

Physical Setup

A physical magnitude of 1 Btu·in/(h·ft²·°F) corresponds to 0.144228 W/(m·K) in standard SI measurement.

Conversion to SI Unit: watt per meter kelvin (W/(m·K))
1 Btu·in/(h·ft²·°F) = 0.144228 W/(m·K)

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)

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 Btu·in/(h·ft²·°F) at Insulated Wall Core (20K across 0.1m = 200 K/m) = 28.8456 W/m²
Equals 0.02885 kW/m² • 9.144 BTU/(h·ft²) • 0.00068896 cal/(s·cm²)
SI Heat Flux
28.8456
W/m²
Watts per Square Meter
Solar / Combustion
0.02885
kW/m²
Kilowatts per Square Meter
US Building Envelope
9.144
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
0.00068896
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
0.04135
Ly/min
Langley per Minute
Furnace Flux
2.884558 × 10⁻⁵
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m·K)):
    k = 1 Btu·in/(h·ft²·°F) × 0.1442279 = 0.1442279 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 = (0.1442279 W/(m·K)) × (200 K/m) = 28.84558 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 28.84558 × 1 = 28.8456 W/m² (Watts per Square Meter) • kW/m²: 28.84558 × 0.001 = 0.02885 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 28.84558 × 0.317 = 9.144 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 28.84558 × 2.3885 × 10⁻⁵ = 0.00068896 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 28.84558 × 0.001433 = 0.04135 Ly/min (Langley per Minute) • MW/m²: 28.84558 × 1 × 10⁻⁶ = 2.884558 × 10⁻⁵ 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 0.00034471295 calories (th)/second/cm/°c (cal (th)/(s·cm·°C)) in 1 btu (it) inch/hour/sq. foot/°f (Btu·in/(h·ft²·°F)). To calculate larger amounts manually, simply multiply your total number of btu (it) inches/hour/sq. foot/°f by the conversion multiplier of 0.00034471295.

The mathematical formula to convert btu (it) inches/hour/sq. foot/°f to calories (th)/second/cm/°c is: [value] * 0.00034471295 = calories (th)/second/cm/°c. 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 calories (th)/second/cm/°c back to btu (it) inches/hour/sq. foot/°f, you must divide your starting value by 0.00034471295. Our bidirectional tool automatically computes this inverse equation the moment you type into the calorie (th)/second/cm/°c input field.

1 Calorie (th)/second/cm/°C is larger than 1 BTU (IT) inch/hour/sq. foot/°F. Specifically, 1 BTU (IT) inch/hour/sq. foot/°F equals 0.00034471295 calories (th)/second/cm/°c, meaning 1 Calorie (th)/second/cm/°C is 2900.9644 times larger than 1 BTU (IT) inch/hour/sq. foot/°F (a difference of 3.46 orders of magnitude). Expressing measurements in btu (it) inches/hour/sq. foot/°f requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 BTU (IT) inch/hour/sq. foot/°F converts to 0.00034471295 calories (th)/second/cm/°c. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.