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Calories (it)/hour/square centimeter to Btus (IT)/hour/square foot Converter (cal/(h·cm²) to Btu/(h·ft²))

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Live Conversion • ISO 80000-5:2019 Certified
1 Calorie (IT)/hour/square centimeter = 3.68669156 Btu (IT)/hour/square foot
1 cal/(h·cm²) = 3.686692 Btu/(h·ft²) • 1 Btu/(h·ft²) = 0.271246 cal/(h·cm²)
Calorie (IT)/hour/square centimeter to Btu (IT)/hour/square foot: One Calorie (IT)/hour/square centimeter is equal to 3.68669156 Btus (IT)/hour/square foot.
Certified Authority Value
3.68669156
Btu/(h·ft²)
Exact: 1 Btu/(h·ft²) ≡ 0.2712459079 cal/(h·cm²)
cal/(h·cm²)
cal/(h·cm²)
Swap to Btu (IT)/hour/square foot to Calorie (IT)/hour/square centimeter
Swap to Btu (IT)/hour/square foot to Calorie (IT)/hour/square centimeter
Btu/(h·ft²)
Btu/(h·ft²) 3.68669156
Quick Values:
Conversion Formula
To convert Calorie (IT)/hour/square centimeter to Btu (IT)/hour/square foot, multiply by 3.68669156
cal/(h·cm²) × 3.68669156 = Btu/(h·ft²)

Calculation: 1 cal/(h·cm²) × 3.68669156 = 3.68669156 Btu/(h·ft²)

Common Calorie (IT)/hour/square centimeter to Btu (IT)/hour/square foot Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Calorie (IT)/hour/square centimeter (cal/(h·cm²)) and Btu (IT)/hour/square foot (Btu/(h·ft²)).

Tap any row to calculate
Calorie (IT)/hour/square centimeter to Btu (IT)/hour/square foot: Primary Direct Table (15 Steps)
Calorie (IT)/hour/square centimeter to Btu (IT)/hour/square foot Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 cal/(h·cm²) 0.00368669 Btu/(h·ft²) 3.687 × 10⁻³
0.01 cal/(h·cm²) 0.0368669 Btu/(h·ft²) 3.687 × 10⁻²
0.1 cal/(h·cm²) 0.368669 Btu/(h·ft²) 3.687 × 10⁻¹
0.5 cal/(h·cm²) 1.843346 Btu/(h·ft²) 1.843 × 10⁰
1 cal/(h·cm²) 3.686692 Btu/(h·ft²) 3.687 × 10⁰
2 cal/(h·cm²) 7.373383 Btu/(h·ft²) 7.373 × 10⁰
5 cal/(h·cm²) 18.433458 Btu/(h·ft²) 1.843 × 10¹
10 cal/(h·cm²) 36.866916 Btu/(h·ft²) 3.687 × 10¹
20 cal/(h·cm²) 73.733831 Btu/(h·ft²) 7.373 × 10¹
25 cal/(h·cm²) 92.167289 Btu/(h·ft²) 9.217 × 10¹
50 cal/(h·cm²) 184.334578 Btu/(h·ft²) 1.843 × 10²
100 cal/(h·cm²) 368.669156 Btu/(h·ft²) 3.687 × 10²
250 cal/(h·cm²) 921.672891 Btu/(h·ft²) 9.217 × 10²
500 cal/(h·cm²) 1843.345781 Btu/(h·ft²) 1.843 × 10³
1000 cal/(h·cm²) 3686.691562 Btu/(h·ft²) 3.687 × 10³
Btu (IT)/hour/square foot to Calorie (IT)/hour/square centimeter: Reciprocal Summary
Btu (IT)/hour/square foot to Calorie (IT)/hour/square centimeter Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu/(h·ft²) 0.271246 cal/(h·cm²) 2.712 × 10⁻¹
5 Btu/(h·ft²) 1.35623 cal/(h·cm²) 1.356 × 10⁰
10 Btu/(h·ft²) 2.712459 cal/(h·cm²) 2.712 × 10⁰
50 Btu/(h·ft²) 13.562295 cal/(h·cm²) 1.356 × 10¹
100 Btu/(h·ft²) 27.124591 cal/(h·cm²) 2.712 × 10¹
View Complete 15-Row Btu (IT)/hour/square foot to Calorie (IT)/hour/square centimeter 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)/hour/square centimeter (cal/(h·cm²)) and Btu (IT)/hour/square foot (Btu/(h·ft²)):

Calorie (IT)/hour/square centimeter References:

  • Clear sky solar radiation energy flux per hour 86 cal/(h·cm²)

Btu (IT)/hour/square foot References:

  • Direct summer sunshine striking asphalt shingle roof surface 300 Btu/(h·ft²)
  • Residential cast iron steam heating radiator surface heat flux 240 Btu/(h·ft²)

Tap any benchmark above to automatically calculate its exact equivalent in Btu (IT)/hour/square foot.

ISQ Dimension: [M T⁻³] Coherent SI Unit: watt per square meter (W/m²) Thermodynamics & Heat Transfer

How to Convert Calorie (IT)/hour/square centimeter to Btu (IT)/hour/square foot

Converting Calorie (IT)/hour/square centimeter (cal/(h·cm²)) to Btu (IT)/hour/square foot (Btu/(h·ft²)) is a core calculation in Heat Flux Density, which measures the rate of thermal energy transfer radiating or conducting through a unit area per second. 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)/hour/square centimeter equals 3.686692 Btu (IT)/hour/square foot, while 1 Btu/(h·ft²) equals 0.271246 cal/(h·cm²).

Direct Factor1 cal/(h·cm²) = 3.686692 Btu/(h·ft²)
Inverse Ratio1 Btu/(h·ft²) = 0.271246 cal/(h·cm²)
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 square meter (W/m²)) 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/(h·cm²) = 11.630003 watt per square meter (W/m²)
2. Target SI Bridge (ktarget):1 Btu/(h·ft²) = 3.154591 watt per square meter (W/m²)
Step-by-step substitution for Calorie (IT)/hour/square centimeter → Btu (IT)/hour/square foot:V(Btu/(h·ft²)) = V(cal/(h·cm²)) × ( 11.630003 / 3.154591 ) = V(cal/(h·cm²)) × 3.686692
Mathematical FormulaValue in Btu (IT)/hour/square foot = Value in Calorie (IT)/hour/square centimeter × 3.68669156Direct computational formula applied for standard conversion.
Worked Example

Converting 75 cal/(h·cm²) yields an exact output of 276.501867 Btu/(h·ft²) in Btu (IT)/hour/square foot. Under higher industrial throughput, 1000 cal/(h·cm²) translates to 3686.691562 Btu/(h·ft²).

Inverse check: 1 Btu/(h·ft²) = 0.271246 cal/(h·cm²).

Understanding Calorie (IT)/hour/square centimeter and Btu (IT)/hour/square foot

Calorie (IT)/hour/square centimeter

cal/(h·cm²)
Standard Unit

A Calorie (IT)/hour/square centimeter (cal/(h·cm²)) is a recognized unit for heat flux density.

Applications & Practical Context

In practical heat flux density terms, a clear sky solar radiation energy flux per hour equals 86 cal/(h·cm²).

Physical Setup

A physical magnitude of 1 cal/(h·cm²) corresponds to 11.630003 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 cal/(h·cm²) = 11.630003 W/m²

Btu (IT)/hour/square foot

Btu/(h·ft²)
Imperial / US

A Btu (IT)/hour/square foot (Btu/(h·ft²)) is an imperial and US customary unit for heat flux density.

Applications & Practical Context

In practical heat flux density terms, a direct summer sunshine striking asphalt shingle roof surface equals 300 Btu/(h·ft²), a residential cast iron steam heating radiator surface heat flux equals 240 Btu/(h·ft²).

Physical Setup

A physical magnitude of 1 Btu/(h·ft²) corresponds to 3.154591 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 Btu/(h·ft²) = 3.154591 W/m²

Domain Metrology & Engineering Applications

Governing Law & Equation

Thermal Transmission Flux (q = Q̇ / A)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using Schmidt-Boelter heat flux gauges, differential thermopile foil transducers, and calibrated Gardon radiant gauges.

Primary Industry Sectors

Applied across rocket nozzle combustion chamber analysis, fire resistance testing (ASTM E119), furnace wall heat loss auditing, and hypersonic aerothermal design under international metrology standard ISO 80000-5:2019, ASME PTC 19.3.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-5:2019, ASME PTC 19.3 and the BIPM SI Brochure (9th Edition). Governed by Thermal Transmission Flux (q = Q̇ / A) under ISO 80000 dimensional vector [M T⁻³].

Multi-Variable Engineering Bridge Thermal Radiation & Power Dissipation

Heat Flux Density to Total Thermal Power Bridge (Watts • Kilowatts • Megawatts • BTU/h • Horsepower)

Calculate total continuous heat dissipation power P = q" × A across surface barriers and exchangers, bridging heat flux density [M T⁻³] with thermal power [M L² T⁻³].

P = q" × A
Vector: [W/m²] × [m²] → [W]
Live Calculated Bridge Equivalent:
1 cal/(h·cm²) at Industrial Hydronic Radiator Panel (8 m²) = 93.04 W
Equals 0.09304 kW • 9.304002 × 10⁻⁵ MW • 0.1248 hp
SI Power
93.04
W
Watts
Grid / Utility
0.09304
kW
Kilowatts
Power Plant
9.304002 × 10⁻⁵
MW
Megawatts
Mechanical Rating
0.1248
hp
Horsepower (Mechanical)
Metric Horsepower
0.1265
PS
Metric Horsepower (PS)
HVAC Thermal Rating
317.47
BTU/h
BTU per Hour
  1. 1. Normalize Input to SI Base Unit (W/m²):
    q" = 1 cal/(h·cm²) × 11.63000308 = 11.63000308 W/m²
  2. 2. Apply Engineering Parameter (A):
    Selected condition: Industrial Hydronic Radiator Panel (8 m²) at A = 8 m²
  3. 3. Execute Governing Physical Law in SI Units:
    P = q" × A = (11.63000308 W/m²) × (8 m²) = 93.040025 W
  4. 4. Convert to Standard Engineering Units:
    • W: 93.040025 × 1 = 93.04 W (Watts) • kW: 93.040025 × 0.001 = 0.09304 kW (Kilowatts) • MW: 93.040025 × 1 × 10⁻⁶ = 9.304002 × 10⁻⁵ MW (Megawatts) • hp: 93.040025 × 0.001341 = 0.1248 hp (Horsepower (Mechanical)) • PS: 93.040025 × 0.00136 = 0.1265 PS (Metric Horsepower (PS)) • BTU/h: 93.040025 × 3.4121 = 317.47 BTU/h (BTU per Hour)
Explore Full Power Converter →
Engineering Substance / Operating Standard Parameter Value (m²) Reference State / Condition Typical Industrial & Engineering Application
Residential Window Glazing (4 m²) 4 4.0 m² Double-pane exterior window glass aperture
Industrial Hydronic Radiator Panel (8 m²) 8 8.0 m² Convective space heating radiator surface
Shell & Tube Heat Exchanger (50 m²) 50 50.0 m² Industrial process fluid cooling bundle
Power Boiler Waterwall (200 m²) 200 200.0 m² Thermal power plant steam generator wall
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Frequently Asked Questions

There are exactly 3.68669156 btus (it)/hour/square foot (Btu/(h·ft²)) in 1 calorie (it)/hour/square centimeter (cal/(h·cm²)). To calculate larger amounts manually, simply multiply your total number of calories (it)/hour/square centimeter by the conversion multiplier of 3.68669156.

The mathematical formula to convert calories (it)/hour/square centimeter to btus (it)/hour/square foot is: [value] * 3.68669156 = btus (it)/hour/square foot. 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 (it)/hour/square foot back to calories (it)/hour/square centimeter, you must divide your starting value by 3.68669156. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (it)/hour/square foot input field.

1 Calorie (IT)/hour/square centimeter is larger than 1 Btu (IT)/hour/square foot. Specifically, 1 Calorie (IT)/hour/square centimeter equals exactly 3.68669156 btus (it)/hour/square foot, making it 3.6867 times larger (a difference of 0.57 orders of magnitude). Therefore, quantities expressed in btus (it)/hour/square foot require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 Calorie (IT)/hour/square centimeter converts to 3.68669156 btus (it)/hour/square foot. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.