Chus/hour/sq. foot/°C to Watts/square meter kelvin Converter (CHU/(h·ft²·°C) to W/(m²·K))

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Live Conversion • ISO 80000-5:2019 Certified

1 CHU/hour/sq. foot/°C = 5.67817254 Watt/square meter kelvin

1 CHU/(h·ft²·°C) = 5.678173 W/(m²·K) • 1 W/(m²·K) = 0.176113 CHU/(h·ft²·°C)

Decimals:

Certified Authority Value

5.67817254

W/(m²·K)

From / Input

CHU/(h·ft²·°C)

Swap to Watt/square meter kelvin to CHU/hour/sq. foot/°C

To / Result

W/(m²·K)

Quick Values:

Conversion Formula

To convert CHU/hour/sq. foot/°C to Watt/square meter kelvin, multiply by 5.67817254

CHU/(h·ft²·°C) × 5.67817254 = W/(m²·K)

Calculation: 1 CHU/(h·ft²·°C) × 5.67817254 = 5.67817254 W/(m²·K)

Common CHU/hour/sq. foot/°C to Watt/square meter kelvin Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between CHU/hour/sq. foot/°C (CHU/(h·ft²·°C)) and Watt/square meter kelvin (W/(m²·K)).

Tap any row to calculate

CHU/hour/sq. foot/°C to Watt/square meter kelvin: Primary Direct Table (15 Steps)

Rule: 1 CHU/hour/sq. foot/°C is equal to 5.678173 W/(m²·K) (Watt/square meter kelvin)

CHU/hour/sq. foot/°C to Watt/square meter kelvin Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 CHU/(h·ft²·°C) 0.00567817 W/(m²·K)	5.678 × 10⁻³
0.01 CHU/(h·ft²·°C) 0.0567817 W/(m²·K)	5.678 × 10⁻²
0.1 CHU/(h·ft²·°C) 0.567817 W/(m²·K)	5.678 × 10⁻¹
0.5 CHU/(h·ft²·°C) 2.839086 W/(m²·K)	2.839 × 10⁰
1 CHU/(h·ft²·°C) 5.678173 W/(m²·K)	5.678 × 10⁰
2 CHU/(h·ft²·°C) 11.356345 W/(m²·K)	1.136 × 10¹
5 CHU/(h·ft²·°C) 28.390863 W/(m²·K)	2.839 × 10¹
10 CHU/(h·ft²·°C) 56.781725 W/(m²·K)	5.678 × 10¹
20 CHU/(h·ft²·°C) 113.563451 W/(m²·K)	1.136 × 10²
25 CHU/(h·ft²·°C) 141.954313 W/(m²·K)	1.42 × 10²
50 CHU/(h·ft²·°C) 283.908627 W/(m²·K)	2.839 × 10²
100 CHU/(h·ft²·°C) 567.817254 W/(m²·K)	5.678 × 10²
250 CHU/(h·ft²·°C) 1419.543134 W/(m²·K)	1.42 × 10³
500 CHU/(h·ft²·°C) 2839.086268 W/(m²·K)	2.839 × 10³
1000 CHU/(h·ft²·°C) 5678.172537 W/(m²·K)	5.678 × 10³

Watt/square meter kelvin to CHU/hour/sq. foot/°C: Reciprocal Summary

Rule: 1 Watt/square meter kelvin is equal to 0.176113 CHU/(h·ft²·°C) (CHU/hour/sq. foot/°C)

Watt/square meter kelvin to CHU/hour/sq. foot/°C Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 W/(m²·K) 0.176113 CHU/(h·ft²·°C)	1.761 × 10⁻¹
5 W/(m²·K) 0.880565 CHU/(h·ft²·°C)	8.806 × 10⁻¹
10 W/(m²·K) 1.76113 CHU/(h·ft²·°C)	1.761 × 10⁰
50 W/(m²·K) 8.80565 CHU/(h·ft²·°C)	8.806 × 10⁰
100 W/(m²·K) 17.6113 CHU/(h·ft²·°C)	1.761 × 10¹

View Complete 15-Row Watt/square meter kelvin 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 Watt/square meter kelvin (W/(m²·K)):

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)

Watt/square meter kelvin References:

Stationary ambient air natural free convection on vertical wall 5 W/(m²·K)
Forced air breeze blowing across automotive cooling radiator 50 W/(m²·K)
Liquid water forced circulation inside heat exchanger pipe 3000 W/(m²·K)
Nucleate boiling heat transfer in pressurized steam boiler tube 15000 W/(m²·K)
Dropwise pure steam condensation on chilled titanium surface 50000 W/(m²·K)

Tap any benchmark above to automatically calculate its exact equivalent in Watt/square meter kelvin.

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 Watt/square meter kelvin

Converting CHU/hour/sq. foot/°C (CHU/(h·ft²·°C)) to Watt/square meter kelvin (W/(m²·K)) 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 5.678173 Watt/square meter kelvin, while 1 W/(m²·K) equals 0.176113 CHU/(h·ft²·°C).

Direct Factor1 CHU/(h·ft²·°C) = 5.678173 W/(m²·K)

Inverse Ratio1 W/(m²·K) = 0.176113 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:

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

2. Target SI Bridge (k_target):1 W/(m²·K) = 1 watt per square meter kelvin (W/(m²·K))

Step-by-step substitution for CHU/hour/sq. foot/°C → Watt/square meter kelvin:V(W/(m²·K)) = V(CHU/(h·ft²·°C)) × ( 5.678173 / 1 ) = V(CHU/(h·ft²·°C)) × 5.678173

Mathematical FormulaValue in Watt/square meter kelvin = Value in CHU/hour/sq. foot/°C × 5.67817254Direct computational formula applied for standard conversion.

Worked Example

Evaluating an input of 24 CHU/hour/sq. foot/°C (CHU/(h·ft²·°C)) produces 136.276141 Watt/square meter kelvin (W/(m²·K)). In heavy-duty utility and industrial workloads, 240 CHU/(h·ft²·°C) equals 1362.761409 W/(m²·K).

Inverse check: 1 W/(m²·K) = 0.176113 CHU/(h·ft²·°C).

Understanding CHU/hour/sq. foot/°C and Watt/square meter kelvin

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].

Input Convective Heat Transfer Coefficient (h): CHU/(h·ft²·°C)

Select Surface-to-Fluid Film Temperature Drop: 25 K

Governing Law: 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

Step-by-Step Numerical Derivation Proof View Derivation

1. Normalize Input to SI Base Unit (W/(m²·K)):
h = 1 CHU/(h·ft²·°C) × 5.67817254 = 5.67817254 W/(m²·K)
2. Apply Engineering Parameter (ΔT):
Selected condition: Forced Air Duct Cooling (ΔT = 25 K) at ΔT = 25 K
3. Execute Governing Physical Law in SI Units:
q" = h × ΔT = (5.67817254 W/(m²·K)) × (25 K) = 141.954313 W/m²
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

Frequently Asked Questions

There are exactly 5.67817254 watts/square meter kelvin (W/(m²·K)) 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 5.67817254.

The mathematical formula to convert chus/hour/sq. foot/°c to watts/square meter kelvin is: [value] * 5.67817254 = watts/square meter kelvin. 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 watts/square meter kelvin back to chus/hour/sq. foot/°c, you must divide your starting value by 5.67817254. Our bidirectional tool automatically computes this inverse equation the moment you type into the watt/square meter kelvin input field.

1 CHU/hour/sq. foot/°C is larger than 1 Watt/square meter kelvin. Specifically, 1 CHU/hour/sq. foot/°C equals exactly 5.67817254 watts/square meter kelvin, making it 5.6782 times larger (a difference of 0.75 orders of magnitude). Therefore, quantities expressed in watts/square meter kelvin require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 CHU/hour/sq. foot/°C converts to 5.67817254 watts/square meter kelvin. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.