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Chus/hour/square foot to Joules/second/square meter Converter (CHU/(h·ft²) to J/(s·m²))

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Live Conversion • ISO 80000-5:2019 Certified
1 CHU/hour/square foot = 5.67826926 Joule/second/square meter
1 CHU/(h·ft²) = 5.678269 J/(s·m²) • 1 J/(s·m²) = 0.17611 CHU/(h·ft²)
CHU/hour/square foot to Joule/second/square meter: One CHU/hour/square foot is equal to 5.67826926 Joules/second/square meter.
Certified Authority Value
5.67826926
J/(s·m²)
Exact: 1 J/(s·m²) ≡ 0.17611 CHU/(h·ft²)
CHU/(h·ft²)
CHU/(h·ft²)
Swap to Joule/second/square meter to CHU/hour/square foot
Swap to Joule/second/square meter to CHU/hour/square foot
J/(s·m²)
J/(s·m²) 5.67826926
Quick Values:
Conversion Formula
To convert CHU/hour/square foot to Joule/second/square meter, multiply by 5.67826926
CHU/(h·ft²) × 5.67826926 = J/(s·m²)

Calculation: 1 CHU/(h·ft²) × 5.67826926 = 5.67826926 J/(s·m²)

Common CHU/hour/square foot to Joule/second/square meter Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between CHU/hour/square foot (CHU/(h·ft²)) and Joule/second/square meter (J/(s·m²)).

Tap any row to calculate
CHU/hour/square foot to Joule/second/square meter: Primary Direct Table (15 Steps)
CHU/hour/square foot to Joule/second/square meter Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 CHU/(h·ft²) 0.00567827 J/(s·m²) 5.678 × 10⁻³
0.01 CHU/(h·ft²) 0.0567827 J/(s·m²) 5.678 × 10⁻²
0.1 CHU/(h·ft²) 0.567827 J/(s·m²) 5.678 × 10⁻¹
0.5 CHU/(h·ft²) 2.839135 J/(s·m²) 2.839 × 10⁰
1 CHU/(h·ft²) 5.678269 J/(s·m²) 5.678 × 10⁰
2 CHU/(h·ft²) 11.356539 J/(s·m²) 1.136 × 10¹
5 CHU/(h·ft²) 28.391346 J/(s·m²) 2.839 × 10¹
10 CHU/(h·ft²) 56.782693 J/(s·m²) 5.678 × 10¹
20 CHU/(h·ft²) 113.565385 J/(s·m²) 1.136 × 10²
25 CHU/(h·ft²) 141.956732 J/(s·m²) 1.42 × 10²
50 CHU/(h·ft²) 283.913463 J/(s·m²) 2.839 × 10²
100 CHU/(h·ft²) 567.826926 J/(s·m²) 5.678 × 10²
250 CHU/(h·ft²) 1419.567316 J/(s·m²) 1.42 × 10³
500 CHU/(h·ft²) 2839.134632 J/(s·m²) 2.839 × 10³
1000 CHU/(h·ft²) 5678.269264 J/(s·m²) 5.678 × 10³
Joule/second/square meter to CHU/hour/square foot: Reciprocal Summary
Joule/second/square meter to CHU/hour/square foot Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 J/(s·m²) 0.17611 CHU/(h·ft²) 1.761 × 10⁻¹
5 J/(s·m²) 0.88055 CHU/(h·ft²) 8.806 × 10⁻¹
10 J/(s·m²) 1.7611 CHU/(h·ft²) 1.761 × 10⁰
50 J/(s·m²) 8.8055 CHU/(h·ft²) 8.806 × 10⁰
100 J/(s·m²) 17.611 CHU/(h·ft²) 1.761 × 10¹
View Complete 15-Row Joule/second/square meter to CHU/hour/square foot 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/square foot (CHU/(h·ft²)) and Joule/second/square meter (J/(s·m²)):

CHU/hour/square foot References:

  • British historical boiler combustion heat transfer flux 150 CHU/(h·ft²)

Joule/second/square meter References:

  • Equivalent to watt per square meter: Clear day solar flux 1000 J/(s·m²)

Tap any benchmark above to automatically calculate its exact equivalent in Joule/second/square meter.

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

How to Convert CHU/hour/square foot to Joule/second/square meter

Converting CHU/hour/square foot (CHU/(h·ft²)) to Joule/second/square meter (J/(s·m²)) 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 CHU/hour/square foot equals 5.678269 Joule/second/square meter, while 1 J/(s·m²) equals 0.17611 CHU/(h·ft²).

Direct Factor1 CHU/(h·ft²) = 5.678269 J/(s·m²)
Inverse Ratio1 J/(s·m²) = 0.17611 CHU/(h·ft²)
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 CHU/(h·ft²) = 5.678269 watt per square meter (W/m²)
2. Target SI Bridge (ktarget):1 J/(s·m²) = 1 watt per square meter (W/m²)
Step-by-step substitution for CHU/hour/square foot → Joule/second/square meter:V(J/(s·m²)) = V(CHU/(h·ft²)) × ( 5.678269 / 1 ) = V(CHU/(h·ft²)) × 5.678269
Mathematical FormulaValue in Joule/second/square meter = Value in CHU/hour/square foot × 5.67826926Direct computational formula applied for standard conversion.
Worked Example

For an engineering input of 36 CHU/(h·ft²), applying the conversion factor yields exactly 204.417693 J/(s·m²). At larger operational scale, 1000 CHU/hour/square foot corresponds to 5678.269264 J/(s·m²).

Inverse check: 1 J/(s·m²) = 0.17611 CHU/(h·ft²).

Understanding CHU/hour/square foot and Joule/second/square meter

CHU/hour/square foot

CHU/(h·ft²)
Imperial / US

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

Applications & Practical Context

In practical heat flux density terms, a British historical boiler combustion heat transfer flux equals 150 CHU/(h·ft²).

Physical Setup

A physical magnitude of 1 CHU/(h·ft²) corresponds to 5.678269 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 CHU/(h·ft²) = 5.678269 W/m²

Joule/second/square meter

J/(s·m²)
Standard Unit

A Joule/second/square meter (J/(s·m²)) is a recognized unit for heat flux density.

Applications & Practical Context

In practical heat flux density terms, a equivalent to watt per square meter: Clear day solar flux equals 1000 J/(s·m²).

Physical Setup

A heat flux density of 1 J/(s·m²) represents thermal energy transfer at a rate of 1 Joule/second/square meter passing across a unit area.

Conversion to SI Unit: watt per square meter (W/m²)
1 J/(s·m²) = 1 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 CHU/(h·ft²) at Industrial Hydronic Radiator Panel (8 m²) = 45.4262 W
Equals 0.04543 kW • 4.542615 × 10⁻⁵ MW • 0.06092 hp
SI Power
45.4262
W
Watts
Grid / Utility
0.04543
kW
Kilowatts
Power Plant
4.542615 × 10⁻⁵
MW
Megawatts
Mechanical Rating
0.06092
hp
Horsepower (Mechanical)
Metric Horsepower
0.06176
PS
Metric Horsepower (PS)
HVAC Thermal Rating
155
BTU/h
BTU per Hour
  1. 1. Normalize Input to SI Base Unit (W/m²):
    q" = 1 CHU/(h·ft²) × 5.67826926 = 5.67826926 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 = (5.67826926 W/m²) × (8 m²) = 45.426154 W
  4. 4. Convert to Standard Engineering Units:
    • W: 45.426154 × 1 = 45.4262 W (Watts) • kW: 45.426154 × 0.001 = 0.04543 kW (Kilowatts) • MW: 45.426154 × 1 × 10⁻⁶ = 4.542615 × 10⁻⁵ MW (Megawatts) • hp: 45.426154 × 0.001341 = 0.06092 hp (Horsepower (Mechanical)) • PS: 45.426154 × 0.00136 = 0.06176 PS (Metric Horsepower (PS)) • BTU/h: 45.426154 × 3.4121 = 155 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 5.67826926 joules/second/square meter (J/(s·m²)) in 1 chu/hour/square foot (CHU/(h·ft²)). To calculate larger amounts manually, simply multiply your total number of chus/hour/square foot by the conversion multiplier of 5.67826926.

The mathematical formula to convert chus/hour/square foot to joules/second/square meter is: [value] * 5.67826926 = joules/second/square meter. 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 joules/second/square meter back to chus/hour/square foot, you must divide your starting value by 5.67826926. Our bidirectional tool automatically computes this inverse equation the moment you type into the joule/second/square meter input field.

1 CHU/hour/square foot is larger than 1 Joule/second/square meter. Specifically, 1 CHU/hour/square foot equals exactly 5.67826926 joules/second/square meter, making it 5.6783 times larger (a difference of 0.75 orders of magnitude). Therefore, quantities expressed in joules/second/square meter require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 CHU/hour/square foot converts to 5.67826926 joules/second/square meter. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.