Skip to main content
0 results ↑ ↓ navigate, ↵ select

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

Rate this converter 0 of 0 ratings
Instant calculation with 0ms overhead
Popular Converters
Live Conversion • ISO 80000-5:2019 Certified
1 Calorie (IT)/minute/cm² = 3.68669048 BTU (IT)/minute/sq. foot
1 cal/(min·cm²) = 3.68669 Btu/(min·ft²) • 1 Btu/(min·ft²) = 0.271246 cal/(min·cm²)
Calorie (IT)/minute/cm² to BTU (IT)/minute/sq. foot: One Calorie (IT)/minute/cm² is equal to 3.68669048 Btus (IT)/minute/sq. foot.
Certified Authority Value
3.68669048
Btu/(min·ft²)
Exact: 1 Btu/(min·ft²) ≡ 0.2712459874 cal/(min·cm²)
cal/(min·cm²)
cal/(min·cm²)
Swap to BTU (IT)/minute/sq. foot to Calorie (IT)/minute/cm²
Swap to BTU (IT)/minute/sq. foot to Calorie (IT)/minute/cm²
Btu/(min·ft²)
Btu/(min·ft²) 3.68669048
Quick Values:
Conversion Formula
To convert Calorie (IT)/minute/cm² to BTU (IT)/minute/sq. foot, multiply by 3.68669048
cal/(min·cm²) × 3.68669048 = Btu/(min·ft²)

Calculation: 1 cal/(min·cm²) × 3.68669048 = 3.68669048 Btu/(min·ft²)

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

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

Tap any row to calculate
Calorie (IT)/minute/cm² to BTU (IT)/minute/sq. foot: Primary Direct Table (15 Steps)
Calorie (IT)/minute/cm² to BTU (IT)/minute/sq. foot Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 cal/(min·cm²) 0.00368669 Btu/(min·ft²) 3.687 × 10⁻³
0.01 cal/(min·cm²) 0.0368669 Btu/(min·ft²) 3.687 × 10⁻²
0.1 cal/(min·cm²) 0.368669 Btu/(min·ft²) 3.687 × 10⁻¹
0.5 cal/(min·cm²) 1.843345 Btu/(min·ft²) 1.843 × 10⁰
1 cal/(min·cm²) 3.68669 Btu/(min·ft²) 3.687 × 10⁰
2 cal/(min·cm²) 7.373381 Btu/(min·ft²) 7.373 × 10⁰
5 cal/(min·cm²) 18.433452 Btu/(min·ft²) 1.843 × 10¹
10 cal/(min·cm²) 36.866905 Btu/(min·ft²) 3.687 × 10¹
20 cal/(min·cm²) 73.73381 Btu/(min·ft²) 7.373 × 10¹
25 cal/(min·cm²) 92.167262 Btu/(min·ft²) 9.217 × 10¹
50 cal/(min·cm²) 184.334524 Btu/(min·ft²) 1.843 × 10²
100 cal/(min·cm²) 368.669048 Btu/(min·ft²) 3.687 × 10²
250 cal/(min·cm²) 921.672621 Btu/(min·ft²) 9.217 × 10²
500 cal/(min·cm²) 1843.345241 Btu/(min·ft²) 1.843 × 10³
1000 cal/(min·cm²) 3686.690482 Btu/(min·ft²) 3.687 × 10³
BTU (IT)/minute/sq. foot to Calorie (IT)/minute/cm²: Reciprocal Summary
BTU (IT)/minute/sq. foot to Calorie (IT)/minute/cm² Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu/(min·ft²) 0.271246 cal/(min·cm²) 2.712 × 10⁻¹
5 Btu/(min·ft²) 1.35623 cal/(min·cm²) 1.356 × 10⁰
10 Btu/(min·ft²) 2.71246 cal/(min·cm²) 2.712 × 10⁰
50 Btu/(min·ft²) 13.562299 cal/(min·cm²) 1.356 × 10¹
100 Btu/(min·ft²) 27.124599 cal/(min·cm²) 2.712 × 10¹
View Complete 15-Row BTU (IT)/minute/sq. foot to Calorie (IT)/minute/cm² Table

Real-World Context & Everyday Benchmarks

Tap to load into converter

To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Calorie (IT)/minute/cm² (cal/(min·cm²)) and BTU (IT)/minute/sq. foot (Btu/(min·ft²)):

Calorie (IT)/minute/cm² References:

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 1.9504 cal/(min·cm²)
  • Clear sky direct midday summer sunlight striking sea level ground 1.4331 cal/(min·cm²)
  • Human body resting thermal metabolic heat radiation to room 0.071654 cal/(min·cm²)
  • Overcast winter day diffuse solar irradiance at sea level 0.143308 cal/(min·cm²)

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

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 7.1906 Btu/(min·ft²)
  • Clear sky direct midday summer sunlight striking sea level ground 5.2833 Btu/(min·ft²)
  • Human body resting thermal metabolic heat radiation to room 0.264165 Btu/(min·ft²)
  • Overcast winter day diffuse solar irradiance at sea level 0.528331 Btu/(min·ft²)

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

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

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

Converting Calorie (IT)/minute/cm² (cal/(min·cm²)) to BTU (IT)/minute/sq. foot (Btu/(min·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 (IT)/minute/cm² equals 3.68669 BTU (IT)/minute/sq. foot, while 1 Btu/(min·ft²) equals 0.271246 cal/(min·cm²).

Direct Factor1 cal/(min·cm²) = 3.68669 Btu/(min·ft²)
Inverse Ratio1 Btu/(min·ft²) = 0.271246 cal/(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/(min·cm²) = 697.8 watt per square meter (W/m²)
2. Target SI Bridge (ktarget):1 Btu/(min·ft²) = 189.27545 watt per square meter (W/m²)
Step-by-step substitution for Calorie (IT)/minute/cm² → BTU (IT)/minute/sq. foot:V(Btu/(min·ft²)) = V(cal/(min·cm²)) × ( 697.8 / 189.27545 ) = V(cal/(min·cm²)) × 3.68669
Mathematical FormulaValue in BTU (IT)/minute/sq. foot = Value in Calorie (IT)/minute/cm² × 3.68669048Direct computational formula applied for standard conversion.
Worked Example

To convert 50 Calorie (IT)/minute/cm² (cal/(min·cm²)) to BTU (IT)/minute/sq. foot (Btu/(min·ft²)): multiply 50 by 3.68669 to get 184.334524 Btu/(min·ft²). At an industrial engineering scale, 10000 cal/(min·cm²) converts to 36866.90482 Btu/(min·ft²).

Inverse check: 1 Btu/(min·ft²) = 0.271246 cal/(min·cm²).

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

Calorie (IT)/minute/cm²

cal/(min·cm²)
Standard Unit

A Calorie (IT)/minute/cm² (cal/(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 1.9504 cal/(min·cm²), a clear sky direct midday summer sunlight striking sea level ground equals 1.4331 cal/(min·cm²), a human body resting thermal metabolic heat radiation to room equals 0.071654 cal/(min·cm²).

Physical Setup

A physical magnitude of 1 cal/(min·cm²) corresponds to 697.8 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 cal/(min·cm²) = 697.8 W/m²

BTU (IT)/minute/sq. foot

Btu/(min·ft²)
Imperial / US

A BTU (IT)/minute/sq. foot (Btu/(min·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 7.1906 Btu/(min·ft²), a clear sky direct midday summer sunlight striking sea level ground equals 5.2833 Btu/(min·ft²), a human body resting thermal metabolic heat radiation to room equals 0.264165 Btu/(min·ft²).

Physical Setup

A physical magnitude of 1 Btu/(min·ft²) corresponds to 189.27545 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 Btu/(min·ft²) = 189.27545 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/(min·cm²) at Industrial Hydronic Radiator Panel (8 m²) = 5582.4 W
Equals 5.5824 kW • 0.0055824 MW • 7.4861 hp
SI Power
5582.4
W
Watts
Grid / Utility
5.5824
kW
Kilowatts
Power Plant
0.0055824
MW
Megawatts
Mechanical Rating
7.4861
hp
Horsepower (Mechanical)
Metric Horsepower
7.59
PS
Metric Horsepower (PS)
HVAC Thermal Rating
19047.94
BTU/h
BTU per Hour
  1. 1. Normalize Input to SI Base Unit (W/m²):
    q" = 1 cal/(min·cm²) × 697.8 = 697.8 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 = (697.8 W/m²) × (8 m²) = 5582.4 W
  4. 4. Convert to Standard Engineering Units:
    • W: 5582.4 × 1 = 5582.4 W (Watts) • kW: 5582.4 × 0.001 = 5.5824 kW (Kilowatts) • MW: 5582.4 × 1 × 10⁻⁶ = 0.0055824 MW (Megawatts) • hp: 5582.4 × 0.001341 = 7.4861 hp (Horsepower (Mechanical)) • PS: 5582.4 × 0.00136 = 7.59 PS (Metric Horsepower (PS)) • BTU/h: 5582.4 × 3.4121 = 19047.94 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
Embed
Need this Calorie (IT)/minute/cm² to BTU (IT)/minute/sq. foot calculator on your website, lab portal, or research blog?
Free HTML Widget 100% Responsive Zero Cookie Tracking
Notice a calculation discrepancy, rounding error, or glitch?
Help us maintain 100% scientific precision and report any issues directly to engineering.

Frequently Asked Questions

There are exactly 3.68669048 btus (it)/minute/sq. foot (Btu/(min·ft²)) in 1 calorie (it)/minute/cm² (cal/(min·cm²)). To calculate larger amounts manually, simply multiply your total number of calories (it)/minute/cm² by the conversion multiplier of 3.68669048.

The mathematical formula to convert calories (it)/minute/cm² to btus (it)/minute/sq. foot is: [value] * 3.68669048 = btus (it)/minute/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)/minute/sq. foot back to calories (it)/minute/cm², you must divide your starting value by 3.68669048. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (it)/minute/sq. foot input field.

1 Calorie (IT)/minute/cm² is larger than 1 BTU (IT)/minute/sq. foot. Specifically, 1 Calorie (IT)/minute/cm² equals exactly 3.68669048 btus (it)/minute/sq. foot, making it 3.6867 times larger (a difference of 0.57 orders of magnitude). Therefore, quantities expressed in btus (it)/minute/sq. foot require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 Calorie (IT)/minute/cm² converts to 3.68669048 btus (it)/minute/sq. foot. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.