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Metric Horsepowers/square foot to Calories (th)/hour/cm² Converter (hp (metric)/ft² to cal (th)/(h·cm²))

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Live Conversion • ISO 80000-5:2019 Certified
1 Metric horsepower/square foot = 681.18100382 Calorie (th)/hour/cm²
1 hp (metric)/ft² = 681.181004 cal (th)/(h·cm²) • 1 cal (th)/(h·cm²) = 0.00146804 hp (metric)/ft²
Metric horsepower/square foot to Calorie (th)/hour/cm²: One Metric horsepower/square foot is equal to 681.18100382 Calories (th)/hour/cm².
Certified Authority Value
681.18100382
cal (th)/(h·cm²)
Exact: 1 cal (th)/(h·cm²) ≡ 0.001468038589 hp (metric)/ft²
hp (metric)/ft²
hp (metric)/ft²
Swap to Calorie (th)/hour/cm² to Metric horsepower/square foot
Swap to Calorie (th)/hour/cm² to Metric horsepower/square foot
cal (th)/(h·cm²)
cal (th)/(h·cm²) 681.18100382
Quick Values:
Conversion Formula
To convert Metric horsepower/square foot to Calorie (th)/hour/cm², multiply by 681.18100382
hp (metric)/ft² × 681.18100382 = cal (th)/(h·cm²)

Calculation: 1 hp (metric)/ft² × 681.18100382 = 681.18100382 cal (th)/(h·cm²)

Common Metric horsepower/square foot to Calorie (th)/hour/cm² Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Metric horsepower/square foot (hp (metric)/ft²) and Calorie (th)/hour/cm² (cal (th)/(h·cm²)).

Tap any row to calculate
Metric horsepower/square foot to Calorie (th)/hour/cm²: Primary Direct Table (15 Steps)
Metric horsepower/square foot to Calorie (th)/hour/cm² Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 hp (metric)/ft² 0.681181 cal (th)/(h·cm²) 6.812 × 10⁻¹
0.01 hp (metric)/ft² 6.81181 cal (th)/(h·cm²) 6.812 × 10⁰
0.1 hp (metric)/ft² 68.1181 cal (th)/(h·cm²) 6.812 × 10¹
0.5 hp (metric)/ft² 340.590502 cal (th)/(h·cm²) 3.406 × 10²
1 hp (metric)/ft² 681.181004 cal (th)/(h·cm²) 6.812 × 10²
2 hp (metric)/ft² 1362.362008 cal (th)/(h·cm²) 1.362 × 10³
5 hp (metric)/ft² 3405.905019 cal (th)/(h·cm²) 3.406 × 10³
10 hp (metric)/ft² 6811.810038 cal (th)/(h·cm²) 6.812 × 10³
20 hp (metric)/ft² 13623.620076 cal (th)/(h·cm²) 1.362 × 10⁴
25 hp (metric)/ft² 17029.525096 cal (th)/(h·cm²) 1.703 × 10⁴
50 hp (metric)/ft² 34059.050191 cal (th)/(h·cm²) 3.406 × 10⁴
100 hp (metric)/ft² 68118.100382 cal (th)/(h·cm²) 6.812 × 10⁴
250 hp (metric)/ft² 170295.250956 cal (th)/(h·cm²) 1.703 × 10⁵
500 hp (metric)/ft² 340590.501912 cal (th)/(h·cm²) 3.406 × 10⁵
1000 hp (metric)/ft² 681181.003824 cal (th)/(h·cm²) 6.812 × 10⁵
Calorie (th)/hour/cm² to Metric horsepower/square foot: Reciprocal Summary
Calorie (th)/hour/cm² to Metric horsepower/square foot Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 cal (th)/(h·cm²) 0.00146804 hp (metric)/ft² 1.468 × 10⁻³
5 cal (th)/(h·cm²) 0.00734019 hp (metric)/ft² 7.34 × 10⁻³
10 cal (th)/(h·cm²) 0.0146804 hp (metric)/ft² 1.468 × 10⁻²
50 cal (th)/(h·cm²) 0.0734019 hp (metric)/ft² 7.34 × 10⁻²
100 cal (th)/(h·cm²) 0.146804 hp (metric)/ft² 1.468 × 10⁻¹
View Complete 15-Row Calorie (th)/hour/cm² to Metric horsepower/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 Metric horsepower/square foot (hp (metric)/ft²) and Calorie (th)/hour/cm² (cal (th)/(h·cm²)):

Metric horsepower/square foot References:

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 0.171912 hp (metric)/ft²
  • Clear sky direct midday summer sunlight striking sea level ground 0.126313 hp (metric)/ft²
  • Human body resting thermal metabolic heat radiation to room 0.006316 hp (metric)/ft²
  • Overcast winter day diffuse solar irradiance at sea level 0.012631 hp (metric)/ft²

Calorie (th)/hour/cm² References:

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 117.1 cal (th)/(h·cm²)
  • Clear sky direct midday summer sunlight striking sea level ground 86.0421 cal (th)/(h·cm²)
  • Human body resting thermal metabolic heat radiation to room 4.3021 cal (th)/(h·cm²)
  • Overcast winter day diffuse solar irradiance at sea level 8.6042 cal (th)/(h·cm²)

Tap any benchmark above to automatically calculate its exact equivalent in Calorie (th)/hour/cm².

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

How to Convert Metric horsepower/square foot to Calorie (th)/hour/cm²

Converting Metric horsepower/square foot (hp (metric)/ft²) to Calorie (th)/hour/cm² (cal (th)/(h·cm²)) 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 Metric horsepower/square foot equals 681.181004 Calorie (th)/hour/cm², while 1 cal (th)/(h·cm²) equals 0.00146804 hp (metric)/ft².

Direct Factor1 hp (metric)/ft² = 681.181004 cal (th)/(h·cm²)
Inverse Ratio1 cal (th)/(h·cm²) = 0.00146804 hp (metric)/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 hp (metric)/ft² = 7916.837 watt per square meter (W/m²)
2. Target SI Bridge (ktarget):1 cal (th)/(h·cm²) = 11.622222 watt per square meter (W/m²)
Step-by-step substitution for Metric horsepower/square foot → Calorie (th)/hour/cm²:V(cal (th)/(h·cm²)) = V(hp (metric)/ft²) × ( 7916.837 / 11.622222 ) = V(hp (metric)/ft²) × 681.181004
Mathematical FormulaValue in Calorie (th)/hour/cm² = Value in Metric horsepower/square foot × 681.18100382Direct computational formula applied for standard conversion.
Worked Example

Converting 15 hp (metric)/ft² yields an exact output of 10217.715057 cal (th)/(h·cm²) in Calorie (th)/hour/cm². Under higher industrial throughput, 480 hp (metric)/ft² translates to 326966.881836 cal (th)/(h·cm²).

Inverse check: 1 cal (th)/(h·cm²) = 0.00146804 hp (metric)/ft².

Understanding Metric horsepower/square foot and Calorie (th)/hour/cm²

Metric horsepower/square foot

hp (metric)/ft²
Imperial / US

A Metric horsepower/square foot (hp (metric)/ft²) is an imperial and US customary unit for heat flux density.

Applications & Practical Context

In practical heat flux density terms, a solar constant extraterrestrial solar irradiance at top of atmosphere equals 0.171912 hp (metric)/ft², a clear sky direct midday summer sunlight striking sea level ground equals 0.126313 hp (metric)/ft², a human body resting thermal metabolic heat radiation to room equals 0.006316 hp (metric)/ft².

Physical Setup

A physical magnitude of 1 hp (metric)/ft² corresponds to 7916.837 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 hp (metric)/ft² = 7916.837 W/m²

Calorie (th)/hour/cm²

cal (th)/(h·cm²)
Standard Unit

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

Applications & Practical Context

In practical heat flux density terms, a solar constant extraterrestrial solar irradiance at top of atmosphere equals 117.1 cal (th)/(h·cm²), a clear sky direct midday summer sunlight striking sea level ground equals 86.0421 cal (th)/(h·cm²), a human body resting thermal metabolic heat radiation to room equals 4.3021 cal (th)/(h·cm²).

Physical Setup

A physical magnitude of 1 cal (th)/(h·cm²) corresponds to 11.622222 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 cal (th)/(h·cm²) = 11.622222 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 hp (metric)/ft² at Industrial Hydronic Radiator Panel (8 m²) = 63334.696 W
Equals 63.3347 kW • 0.0633347 MW • 84.9332 hp
SI Power
63334.696
W
Watts
Grid / Utility
63.3347
kW
Kilowatts
Power Plant
0.0633347
MW
Megawatts
Mechanical Rating
84.9332
hp
Horsepower (Mechanical)
Metric Horsepower
86.1112
PS
Metric Horsepower (PS)
HVAC Thermal Rating
216106.95
BTU/h
BTU per Hour
  1. 1. Normalize Input to SI Base Unit (W/m²):
    q" = 1 hp (metric)/ft² × 7916.837 = 7916.837 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 = (7916.837 W/m²) × (8 m²) = 63334.696 W
  4. 4. Convert to Standard Engineering Units:
    • W: 63334.696 × 1 = 63334.696 W (Watts) • kW: 63334.696 × 0.001 = 63.3347 kW (Kilowatts) • MW: 63334.696 × 1 × 10⁻⁶ = 0.0633347 MW (Megawatts) • hp: 63334.696 × 0.001341 = 84.9332 hp (Horsepower (Mechanical)) • PS: 63334.696 × 0.00136 = 86.1112 PS (Metric Horsepower (PS)) • BTU/h: 63334.696 × 3.4121 = 216106.95 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 681.18100382 calories (th)/hour/cm² (cal (th)/(h·cm²)) in 1 metric horsepower/square foot (hp (metric)/ft²). To calculate larger amounts manually, simply multiply your total number of metric horsepowers/square foot by the conversion multiplier of 681.18100382.

The mathematical formula to convert metric horsepowers/square foot to calories (th)/hour/cm² is: [value] * 681.18100382 = calories (th)/hour/cm². 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)/hour/cm² back to metric horsepowers/square foot, you must divide your starting value by 681.18100382. Our bidirectional tool automatically computes this inverse equation the moment you type into the calorie (th)/hour/cm² input field.

1 Metric horsepower/square foot is larger than 1 Calorie (th)/hour/cm². Specifically, 1 Metric horsepower/square foot equals exactly 681.18100382 calories (th)/hour/cm², making it 681.181 times larger (a difference of 2.83 orders of magnitude). Therefore, quantities expressed in calories (th)/hour/cm² require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 Metric horsepower/square foot converts to 681.18100382 calories (th)/hour/cm². Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.