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Calories (th)/minute/cm² to Btus (IT)/second/sq. foot Converter (cal (th)/(min·cm²) to Btu/(s·ft²))

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Live Conversion • ISO 80000-5:2019 Certified
1 Calorie (th)/minute/cm² = 0.061403749 BTU (IT)/second/sq. foot
1 cal (th)/(min·cm²) = 0.0614037 Btu/(s·ft²) • 1 Btu/(s·ft²) = 16.285651 cal (th)/(min·cm²)
Calorie (th)/minute/cm² to BTU (IT)/second/sq. foot: One Calorie (th)/minute/cm² is equal to 0.061403749 Btus (IT)/second/sq. foot.
Certified Authority Value
0.06140375
Btu/(s·ft²)
Exact: 1 Btu/(s·ft²) ≡ 16.2856505736 cal (th)/(min·cm²)
cal (th)/(min·cm²)
cal (th)/(min·cm²)
Swap to BTU (IT)/second/sq. foot to Calorie (th)/minute/cm²
Swap to BTU (IT)/second/sq. foot to Calorie (th)/minute/cm²
Btu/(s·ft²)
Btu/(s·ft²) 0.061403749
Quick Values:
Conversion Formula
To convert Calorie (th)/minute/cm² to BTU (IT)/second/sq. foot, multiply by 0.061403749
cal (th)/(min·cm²) × 0.061403749 = Btu/(s·ft²)

Calculation: 1 cal (th)/(min·cm²) × 0.061403749 = 0.061403749 Btu/(s·ft²)

Common Calorie (th)/minute/cm² to BTU (IT)/second/sq. foot Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Calorie (th)/minute/cm² (cal (th)/(min·cm²)) and BTU (IT)/second/sq. foot (Btu/(s·ft²)).

Tap any row to calculate
Calorie (th)/minute/cm² to BTU (IT)/second/sq. foot: Primary Direct Table (15 Steps)
Calorie (th)/minute/cm² to BTU (IT)/second/sq. foot Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 cal (th)/(min·cm²) 6.140375 × 10⁻⁵ Btu/(s·ft²) 6.14 × 10⁻⁵
0.01 cal (th)/(min·cm²) 0.000614037 Btu/(s·ft²) 6.14 × 10⁻⁴
0.1 cal (th)/(min·cm²) 0.00614037 Btu/(s·ft²) 6.14 × 10⁻³
0.5 cal (th)/(min·cm²) 0.0307019 Btu/(s·ft²) 3.07 × 10⁻²
1 cal (th)/(min·cm²) 0.0614037 Btu/(s·ft²) 6.14 × 10⁻²
2 cal (th)/(min·cm²) 0.122807 Btu/(s·ft²) 1.228 × 10⁻¹
5 cal (th)/(min·cm²) 0.307019 Btu/(s·ft²) 3.07 × 10⁻¹
10 cal (th)/(min·cm²) 0.614037 Btu/(s·ft²) 6.14 × 10⁻¹
20 cal (th)/(min·cm²) 1.228075 Btu/(s·ft²) 1.228 × 10⁰
25 cal (th)/(min·cm²) 1.535094 Btu/(s·ft²) 1.535 × 10⁰
50 cal (th)/(min·cm²) 3.070187 Btu/(s·ft²) 3.07 × 10⁰
100 cal (th)/(min·cm²) 6.140375 Btu/(s·ft²) 6.14 × 10⁰
250 cal (th)/(min·cm²) 15.350937 Btu/(s·ft²) 1.535 × 10¹
500 cal (th)/(min·cm²) 30.701874 Btu/(s·ft²) 3.07 × 10¹
1000 cal (th)/(min·cm²) 61.403749 Btu/(s·ft²) 6.14 × 10¹
BTU (IT)/second/sq. foot to Calorie (th)/minute/cm²: Reciprocal Summary
BTU (IT)/second/sq. foot to Calorie (th)/minute/cm² Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu/(s·ft²) 16.285651 cal (th)/(min·cm²) 1.629 × 10¹
5 Btu/(s·ft²) 81.428253 cal (th)/(min·cm²) 8.143 × 10¹
10 Btu/(s·ft²) 162.856506 cal (th)/(min·cm²) 1.629 × 10²
50 Btu/(s·ft²) 814.282529 cal (th)/(min·cm²) 8.143 × 10²
100 Btu/(s·ft²) 1628.565057 cal (th)/(min·cm²) 1.629 × 10³
View Complete 15-Row BTU (IT)/second/sq. foot to Calorie (th)/minute/cm² 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 (th)/minute/cm² (cal (th)/(min·cm²)) and BTU (IT)/second/sq. foot (Btu/(s·ft²)):

Calorie (th)/minute/cm² References:

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 1.9517 cal (th)/(min·cm²)
  • Clear sky direct midday summer sunlight striking sea level ground 1.434 cal (th)/(min·cm²)
  • Human body resting thermal metabolic heat radiation to room 0.071702 cal (th)/(min·cm²)
  • Overcast winter day diffuse solar irradiance at sea level 0.143403 cal (th)/(min·cm²)

BTU (IT)/second/sq. foot References:

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 0.119843 Btu/(s·ft²)
  • Clear sky direct midday summer sunlight striking sea level ground 0.088055 Btu/(s·ft²)
  • Human body resting thermal metabolic heat radiation to room 0.004403 Btu/(s·ft²)
  • Overcast winter day diffuse solar irradiance at sea level 0.008806 Btu/(s·ft²)

Tap any benchmark above to automatically calculate its exact equivalent in BTU (IT)/second/sq. foot.

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

How to Convert Calorie (th)/minute/cm² to BTU (IT)/second/sq. foot

Converting Calorie (th)/minute/cm² (cal (th)/(min·cm²)) to BTU (IT)/second/sq. foot (Btu/(s·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 (th)/minute/cm² equals 0.0614037 BTU (IT)/second/sq. foot, while 1 Btu/(s·ft²) equals 16.285651 cal (th)/(min·cm²).

Direct Factor1 cal (th)/(min·cm²) = 0.0614037 Btu/(s·ft²)
Inverse Ratio1 Btu/(s·ft²) = 16.285651 cal (th)/(min·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 (th)/(min·cm²) = 697.333333 watt per square meter (W/m²)
2. Target SI Bridge (ktarget):1 Btu/(s·ft²) = 11356.527 watt per square meter (W/m²)
Step-by-step substitution for Calorie (th)/minute/cm² → BTU (IT)/second/sq. foot:V(Btu/(s·ft²)) = V(cal (th)/(min·cm²)) × ( 697.333333 / 11356.527 ) = V(cal (th)/(min·cm²)) × 0.0614037
Mathematical FormulaValue in BTU (IT)/second/sq. foot = Value in Calorie (th)/minute/cm² × 0.061403749Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 24 Calorie (th)/minute/cm² (cal (th)/(min·cm²)) produces 1.47369 BTU (IT)/second/sq. foot (Btu/(s·ft²)). In heavy-duty utility and industrial workloads, 480 cal (th)/(min·cm²) equals 29.4738 Btu/(s·ft²).

Inverse check: 1 Btu/(s·ft²) = 16.285651 cal (th)/(min·cm²).

Understanding Calorie (th)/minute/cm² and BTU (IT)/second/sq. foot

Calorie (th)/minute/cm²

cal (th)/(min·cm²)
Standard Unit

A Calorie (th)/minute/cm² (cal (th)/(min·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 1.9517 cal (th)/(min·cm²), a clear sky direct midday summer sunlight striking sea level ground equals 1.434 cal (th)/(min·cm²), a human body resting thermal metabolic heat radiation to room equals 0.071702 cal (th)/(min·cm²).

Physical Setup

A physical magnitude of 1 cal (th)/(min·cm²) corresponds to 697.333333 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 cal (th)/(min·cm²) = 697.333333 W/m²

BTU (IT)/second/sq. foot

Btu/(s·ft²)
Imperial / US

A BTU (IT)/second/sq. foot (Btu/(s·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 0.119843 Btu/(s·ft²), a clear sky direct midday summer sunlight striking sea level ground equals 0.088055 Btu/(s·ft²), a human body resting thermal metabolic heat radiation to room equals 0.004403 Btu/(s·ft²).

Physical Setup

A physical magnitude of 1 Btu/(s·ft²) corresponds to 11356.527 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 Btu/(s·ft²) = 11356.527 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 (th)/(min·cm²) at Industrial Hydronic Radiator Panel (8 m²) = 5578.6667 W
Equals 5.5787 kW • 0.00557867 MW • 7.4811 hp
SI Power
5578.6667
W
Watts
Grid / Utility
5.5787
kW
Kilowatts
Power Plant
0.00557867
MW
Megawatts
Mechanical Rating
7.4811
hp
Horsepower (Mechanical)
Metric Horsepower
7.5849
PS
Metric Horsepower (PS)
HVAC Thermal Rating
19035.2
BTU/h
BTU per Hour
  1. 1. Normalize Input to SI Base Unit (W/m²):
    q" = 1 cal (th)/(min·cm²) × 697.33333333 = 697.33333333 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 = (697.33333333 W/m²) × (8 m²) = 5578.666667 W
  4. 4. Convert to Standard Engineering Units:
    • W: 5578.666667 × 1 = 5578.6667 W (Watts) • kW: 5578.666667 × 0.001 = 5.5787 kW (Kilowatts) • MW: 5578.666667 × 1 × 10⁻⁶ = 0.00557867 MW (Megawatts) • hp: 5578.666667 × 0.001341 = 7.4811 hp (Horsepower (Mechanical)) • PS: 5578.666667 × 0.00136 = 7.5849 PS (Metric Horsepower (PS)) • BTU/h: 5578.666667 × 3.4121 = 19035.2 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 0.061403749 btus (it)/second/sq. foot (Btu/(s·ft²)) in 1 calorie (th)/minute/cm² (cal (th)/(min·cm²)). To calculate larger amounts manually, simply multiply your total number of calories (th)/minute/cm² by the conversion multiplier of 0.061403749.

The mathematical formula to convert calories (th)/minute/cm² to btus (it)/second/sq. foot is: [value] * 0.061403749 = btus (it)/second/sq. 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)/second/sq. foot back to calories (th)/minute/cm², you must divide your starting value by 0.061403749. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (it)/second/sq. foot input field.

1 BTU (IT)/second/sq. foot is larger than 1 Calorie (th)/minute/cm². Specifically, 1 Calorie (th)/minute/cm² equals 0.061403749 btus (it)/second/sq. foot, meaning 1 BTU (IT)/second/sq. foot is 16.2857 times larger than 1 Calorie (th)/minute/cm² (a difference of 1.21 orders of magnitude). Expressing measurements in calories (th)/minute/cm² requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Calorie (th)/minute/cm² converts to 0.061403749 btus (it)/second/sq. foot. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.