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Chus/hour/sq. foot/°C to Kilocalories (it)/hour/ft²/°C Converter (CHU/(h·ft²·°C) to kcal/(h·ft²·°C))

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Live Conversion • ISO 80000-5:2019 Certified
1 CHU/hour/sq. foot/°C = 0.45360536 Kilocalorie (IT)/hour/ft²/°C
1 CHU/(h·ft²·°C) = 0.453605 kcal/(h·ft²·°C) • 1 kcal/(h·ft²·°C) = 2.20456 CHU/(h·ft²·°C)
CHU/hour/sq. foot/°C to Kilocalorie (IT)/hour/ft²/°C: One CHU/hour/sq. foot/°C is equal to 0.45360536 Kilocalories (it)/hour/ft²/°C.
Certified Authority Value
0.45360536
kcal/(h·ft²·°C)
Exact: 1 kcal/(h·ft²·°C) ≡ 2.2045595087 CHU/(h·ft²·°C)
CHU/(h·ft²·°C)
CHU/(h·ft²·°C)
Swap to Kilocalorie (IT)/hour/ft²/°C to CHU/hour/sq. foot/°C
Swap to Kilocalorie (IT)/hour/ft²/°C to CHU/hour/sq. foot/°C
kcal/(h·ft²·°C)
kcal/(h·ft²·°C) 0.45360536
Quick Values:
Conversion Formula
To convert CHU/hour/sq. foot/°C to Kilocalorie (IT)/hour/ft²/°C, multiply by 0.45360536
CHU/(h·ft²·°C) × 0.45360536 = kcal/(h·ft²·°C)

Calculation: 1 CHU/(h·ft²·°C) × 0.45360536 = 0.45360536 kcal/(h·ft²·°C)

Common CHU/hour/sq. foot/°C to Kilocalorie (IT)/hour/ft²/°C Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between CHU/hour/sq. foot/°C (CHU/(h·ft²·°C)) and Kilocalorie (IT)/hour/ft²/°C (kcal/(h·ft²·°C)).

Tap any row to calculate
CHU/hour/sq. foot/°C to Kilocalorie (IT)/hour/ft²/°C: Primary Direct Table (15 Steps)
CHU/hour/sq. foot/°C to Kilocalorie (IT)/hour/ft²/°C Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 CHU/(h·ft²·°C) 0.000453605 kcal/(h·ft²·°C) 4.536 × 10⁻⁴
0.01 CHU/(h·ft²·°C) 0.00453605 kcal/(h·ft²·°C) 4.536 × 10⁻³
0.1 CHU/(h·ft²·°C) 0.0453605 kcal/(h·ft²·°C) 4.536 × 10⁻²
0.5 CHU/(h·ft²·°C) 0.226803 kcal/(h·ft²·°C) 2.268 × 10⁻¹
1 CHU/(h·ft²·°C) 0.453605 kcal/(h·ft²·°C) 4.536 × 10⁻¹
2 CHU/(h·ft²·°C) 0.907211 kcal/(h·ft²·°C) 9.072 × 10⁻¹
5 CHU/(h·ft²·°C) 2.268027 kcal/(h·ft²·°C) 2.268 × 10⁰
10 CHU/(h·ft²·°C) 4.536054 kcal/(h·ft²·°C) 4.536 × 10⁰
20 CHU/(h·ft²·°C) 9.072107 kcal/(h·ft²·°C) 9.072 × 10⁰
25 CHU/(h·ft²·°C) 11.340134 kcal/(h·ft²·°C) 1.134 × 10¹
50 CHU/(h·ft²·°C) 22.680268 kcal/(h·ft²·°C) 2.268 × 10¹
100 CHU/(h·ft²·°C) 45.360536 kcal/(h·ft²·°C) 4.536 × 10¹
250 CHU/(h·ft²·°C) 113.401339 kcal/(h·ft²·°C) 1.134 × 10²
500 CHU/(h·ft²·°C) 226.802678 kcal/(h·ft²·°C) 2.268 × 10²
1000 CHU/(h·ft²·°C) 453.605356 kcal/(h·ft²·°C) 4.536 × 10²
Kilocalorie (IT)/hour/ft²/°C to CHU/hour/sq. foot/°C: Reciprocal Summary
Kilocalorie (IT)/hour/ft²/°C to CHU/hour/sq. foot/°C Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 kcal/(h·ft²·°C) 2.20456 CHU/(h·ft²·°C) 2.205 × 10⁰
5 kcal/(h·ft²·°C) 11.022798 CHU/(h·ft²·°C) 1.102 × 10¹
10 kcal/(h·ft²·°C) 22.045595 CHU/(h·ft²·°C) 2.205 × 10¹
50 kcal/(h·ft²·°C) 110.227975 CHU/(h·ft²·°C) 1.102 × 10²
100 kcal/(h·ft²·°C) 220.455951 CHU/(h·ft²·°C) 2.205 × 10²
View Complete 15-Row Kilocalorie (IT)/hour/ft²/°C to CHU/hour/sq. foot/°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 CHU/hour/sq. foot/°C (CHU/(h·ft²·°C)) and Kilocalorie (IT)/hour/ft²/°C (kcal/(h·ft²·°C)):

CHU/hour/sq. foot/°C References:

  • Stationary ambient air natural free convection on vertical wall 0.880565 CHU/(h·ft²·°C)
  • Forced air breeze blowing across automotive cooling radiator 8.8057 CHU/(h·ft²·°C)
  • Liquid water forced circulation inside heat exchanger pipe 528.34 CHU/(h·ft²·°C)
  • Nucleate boiling heat transfer in pressurized steam boiler tube 2641.7 CHU/(h·ft²·°C)

Kilocalorie (IT)/hour/ft²/°C References:

  • Stationary ambient air natural free convection on vertical wall 0.399429 kcal/(h·ft²·°C)
  • Forced air breeze blowing across automotive cooling radiator 3.9943 kcal/(h·ft²·°C)
  • Liquid water forced circulation inside heat exchanger pipe 239.66 kcal/(h·ft²·°C)
  • Nucleate boiling heat transfer in pressurized steam boiler tube 1198.29 kcal/(h·ft²·°C)

Tap any benchmark above to automatically calculate its exact equivalent in Kilocalorie (IT)/hour/ft²/°C.

ISQ Dimension: [M T⁻³ Θ⁻¹] Coherent SI Unit: watt per square meter kelvin (W/(m²·K)) Thermodynamics & Heat Transfer

How to Convert CHU/hour/sq. foot/°C to Kilocalorie (IT)/hour/ft²/°C

Converting CHU/hour/sq. foot/°C (CHU/(h·ft²·°C)) to Kilocalorie (IT)/hour/ft²/°C (kcal/(h·ft²·°C)) is a core calculation in Heat Transfer Coefficient, which quantifies the proportionality constant between the heat flux and the thermodynamic driving temperature difference. 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 CHU/hour/sq. foot/°C equals 0.453605 Kilocalorie (IT)/hour/ft²/°C, while 1 kcal/(h·ft²·°C) equals 2.20456 CHU/(h·ft²·°C).

Direct Factor1 CHU/(h·ft²·°C) = 0.453605 kcal/(h·ft²·°C)
Inverse Ratio1 kcal/(h·ft²·°C) = 2.20456 CHU/(h·ft²·°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 square meter kelvin (W/(m²·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 CHU/(h·ft²·°C) = 5.678173 watt per square meter kelvin (W/(m²·K))
2. Target SI Bridge (ktarget):1 kcal/(h·ft²·°C) = 12.517869 watt per square meter kelvin (W/(m²·K))
Step-by-step substitution for CHU/hour/sq. foot/°C → Kilocalorie (IT)/hour/ft²/°C:V(kcal/(h·ft²·°C)) = V(CHU/(h·ft²·°C)) × ( 5.678173 / 12.517869 ) = V(CHU/(h·ft²·°C)) × 0.453605
Mathematical FormulaValue in Kilocalorie (IT)/hour/ft²/°C = Value in CHU/hour/sq. foot/°C × 0.45360536Direct computational formula applied for standard conversion.
Worked Example

For an engineering input of 75 CHU/(h·ft²·°C), applying the conversion factor yields exactly 34.020402 kcal/(h·ft²·°C). At larger operational scale, 240 CHU/hour/sq. foot/°C corresponds to 108.865285 kcal/(h·ft²·°C).

Inverse check: 1 kcal/(h·ft²·°C) = 2.20456 CHU/(h·ft²·°C).

Understanding CHU/hour/sq. foot/°C and Kilocalorie (IT)/hour/ft²/°C

CHU/hour/sq. foot/°C

CHU/(h·ft²·°C)
Imperial / US

A CHU/hour/sq. foot/°C (CHU/(h·ft²·°C)) is an imperial and US customary unit for heat transfer coefficient.

Applications & Practical Context

In practical heat transfer coefficient terms, a stationary ambient air natural free convection on vertical wall equals 0.880565 CHU/(h·ft²·°C), a forced air breeze blowing across automotive cooling radiator equals 8.8057 CHU/(h·ft²·°C), a liquid water forced circulation inside heat exchanger pipe equals 528.34 CHU/(h·ft²·°C).

Physical Setup

A physical magnitude of 1 CHU/(h·ft²·°C) corresponds to 5.678173 W/(m²·K) in standard SI measurement.

Conversion to SI Unit: watt per square meter kelvin (W/(m²·K))
1 CHU/(h·ft²·°C) = 5.678173 W/(m²·K)

Kilocalorie (IT)/hour/ft²/°C

kcal/(h·ft²·°C)
SI Multiple

A Kilocalorie (IT)/hour/ft²/°C (kcal/(h·ft²·°C)) is a decimal multiple of the SI-derived unit for heat transfer coefficient.

Applications & Practical Context

In practical heat transfer coefficient terms, a stationary ambient air natural free convection on vertical wall equals 0.399429 kcal/(h·ft²·°C), a forced air breeze blowing across automotive cooling radiator equals 3.9943 kcal/(h·ft²·°C), a liquid water forced circulation inside heat exchanger pipe equals 239.66 kcal/(h·ft²·°C).

Physical Setup

A physical magnitude of 1 kcal/(h·ft²·°C) corresponds to 12.517869 W/(m²·K) in standard SI measurement.

Conversion to SI Unit: watt per square meter kelvin (W/(m²·K))
1 kcal/(h·ft²·°C) = 12.517869 W/(m²·K)

Domain Metrology & Engineering Applications

Governing Law & Equation

Newton's Law of Cooling (q = h · ΔT)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using surface heat flux transducer plates coupled with surface RTD arrays, and wind tunnel boundary layer calorimeters.

Primary Industry Sectors

Applied across industrial heat exchanger rating, nuclear reactor cooling loop simulation, electronics forced-air cooling, and architectural U-value certification under international metrology standard ISO 80000-5:2019, ASME PTC.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-5:2019, ASME PTC and the BIPM SI Brochure (9th Edition). Governed by Newton's Law of Cooling (q = h · ΔT) under ISO 80000 dimensional vector [M T⁻³ Θ⁻¹].

Multi-Variable Engineering Bridge Convective Thermodynamics & Cooling

Heat Transfer Coefficient to Convective Flux Bridge (W/m² • kW/m² • BTU/(h·ft²) • cal/(s·cm²))

Calculate Newton’s law of cooling convective heat flux q" = h × ΔT across convective film temperature drops, bridging heat transfer coefficient [M T⁻³ Θ⁻¹] with heat flux [M T⁻³].

q" = h × ΔT
Vector: [W/(m²·K)] × [K] → [W/m²]
Live Calculated Bridge Equivalent:
1 CHU/(h·ft²·°C) at Forced Air Duct Cooling (ΔT = 25 K) = 141.9543 W/m²
Equals 0.142 kW/m² • 44.9993 BTU/(h·ft²) • 0.00339052 cal/(s·cm²)
SI Heat Flux
141.9543
W/m²
Watts per Square Meter
Solar / Combustion
0.142
kW/m²
Kilowatts per Square Meter
US Building Envelope
44.9993
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
0.00339052
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
0.2035
Ly/min
Langley per Minute
Furnace Flux
0.00014195
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m²·K)):
    h = 1 CHU/(h·ft²·°C) × 5.67817254 = 5.67817254 W/(m²·K)
  2. 2. Apply Engineering Parameter (ΔT):
    Selected condition: Forced Air Duct Cooling (ΔT = 25 K) at ΔT = 25 K
  3. 3. Execute Governing Physical Law in SI Units:
    q" = h × ΔT = (5.67817254 W/(m²·K)) × (25 K) = 141.954313 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 141.954313 × 1 = 141.9543 W/m² (Watts per Square Meter) • kW/m²: 141.954313 × 0.001 = 0.142 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 141.954313 × 0.317 = 44.9993 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 141.954313 × 2.3885 × 10⁻⁵ = 0.00339052 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 141.954313 × 0.001433 = 0.2035 Ly/min (Langley per Minute) • MW/m²: 141.954313 × 1 × 10⁻⁶ = 0.00014195 MW/m² (Megawatts per Square Meter)
Explore Full Heat Flux Density Converter →
Engineering Substance / Operating Standard Parameter Value (K) Reference State / Condition Typical Industrial & Engineering Application
Natural Air Convection (ΔT = 15 K) 15 ΔT = 15 K (15°C) Still room air room heating surface delta
Forced Air Duct Cooling (ΔT = 25 K) 25 ΔT = 25 K (25°C) Forced fan ventilation heatsink airflow
Forced Liquid Water Cooling (ΔT = 30 K) 30 ΔT = 30 K Pumped liquid cold plate or engine jacket
Nucleate Boiling Heat Transfer (ΔT = 50 K) 50 ΔT = 50 K Boiler evaporator tube wall boundary
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Frequently Asked Questions

There are exactly 0.45360536 kilocalories (it)/hour/ft²/°c (kcal/(h·ft²·°C)) in 1 chu/hour/sq. foot/°c (CHU/(h·ft²·°C)). To calculate larger amounts manually, simply multiply your total number of chus/hour/sq. foot/°c by the conversion multiplier of 0.45360536.

The mathematical formula to convert chus/hour/sq. foot/°c to kilocalories (it)/hour/ft²/°c is: [value] * 0.45360536 = kilocalories (it)/hour/ft²/°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 kilocalories (it)/hour/ft²/°c back to chus/hour/sq. foot/°c, you must divide your starting value by 0.45360536. Our bidirectional tool automatically computes this inverse equation the moment you type into the kilocalorie (it)/hour/ft²/°c input field.

1 Kilocalorie (IT)/hour/ft²/°C is larger than 1 CHU/hour/sq. foot/°C. Specifically, 1 CHU/hour/sq. foot/°C equals 0.45360536 kilocalories (it)/hour/ft²/°c, meaning 1 Kilocalorie (IT)/hour/ft²/°C is 2.2046 times larger than 1 CHU/hour/sq. foot/°C (a difference of 0.34 orders of magnitude). Expressing measurements in chus/hour/sq. foot/°c requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 CHU/hour/sq. foot/°C converts to 0.45360536 kilocalories (it)/hour/ft²/°c. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.