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Btus (IT)/second/sq. foot/°F to Calories (it)/second/cm²/°C Converter (Btu/(s·ft²·°F) to cal/(s·cm²·°C))

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Live Conversion • ISO 80000-5:2019 Certified
1 BTU (IT)/second/sq. foot/°F = 0.48824276 Calorie (IT)/second/cm²/°C
1 Btu/(s·ft²·°F) = 0.488243 cal/(s·cm²·°C) • 1 cal/(s·cm²·°C) = 2.048161 Btu/(s·ft²·°F)
BTU (IT)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C: One BTU (IT)/second/sq. foot/°F is equal to 0.48824276 Calories (it)/second/cm²/°C.
Certified Authority Value
0.48824276
cal/(s·cm²·°C)
Exact: 1 cal/(s·cm²·°C) ≡ 2.048161439 Btu/(s·ft²·°F)
Btu/(s·ft²·°F)
Btu/(s·ft²·°F)
Swap to Calorie (IT)/second/cm²/°C to BTU (IT)/second/sq. foot/°F
Swap to Calorie (IT)/second/cm²/°C to BTU (IT)/second/sq. foot/°F
cal/(s·cm²·°C)
cal/(s·cm²·°C) 0.48824276
Quick Values:
Conversion Formula
To convert BTU (IT)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C, multiply by 0.48824276
Btu/(s·ft²·°F) × 0.48824276 = cal/(s·cm²·°C)

Calculation: 1 Btu/(s·ft²·°F) × 0.48824276 = 0.48824276 cal/(s·cm²·°C)

Common BTU (IT)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C Calculations

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

Tap any row to calculate
BTU (IT)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C: Primary Direct Table (15 Steps)
BTU (IT)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 Btu/(s·ft²·°F) 0.000488243 cal/(s·cm²·°C) 4.882 × 10⁻⁴
0.01 Btu/(s·ft²·°F) 0.00488243 cal/(s·cm²·°C) 4.882 × 10⁻³
0.1 Btu/(s·ft²·°F) 0.0488243 cal/(s·cm²·°C) 4.882 × 10⁻²
0.5 Btu/(s·ft²·°F) 0.244121 cal/(s·cm²·°C) 2.441 × 10⁻¹
1 Btu/(s·ft²·°F) 0.488243 cal/(s·cm²·°C) 4.882 × 10⁻¹
2 Btu/(s·ft²·°F) 0.976486 cal/(s·cm²·°C) 9.765 × 10⁻¹
5 Btu/(s·ft²·°F) 2.441214 cal/(s·cm²·°C) 2.441 × 10⁰
10 Btu/(s·ft²·°F) 4.882428 cal/(s·cm²·°C) 4.882 × 10⁰
20 Btu/(s·ft²·°F) 9.764855 cal/(s·cm²·°C) 9.765 × 10⁰
25 Btu/(s·ft²·°F) 12.206069 cal/(s·cm²·°C) 1.221 × 10¹
50 Btu/(s·ft²·°F) 24.412138 cal/(s·cm²·°C) 2.441 × 10¹
100 Btu/(s·ft²·°F) 48.824276 cal/(s·cm²·°C) 4.882 × 10¹
250 Btu/(s·ft²·°F) 122.060691 cal/(s·cm²·°C) 1.221 × 10²
500 Btu/(s·ft²·°F) 244.121381 cal/(s·cm²·°C) 2.441 × 10²
1000 Btu/(s·ft²·°F) 488.242763 cal/(s·cm²·°C) 4.882 × 10²
Calorie (IT)/second/cm²/°C to BTU (IT)/second/sq. foot/°F: Reciprocal Summary
Calorie (IT)/second/cm²/°C to BTU (IT)/second/sq. foot/°F Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 cal/(s·cm²·°C) 2.048161 Btu/(s·ft²·°F) 2.048 × 10⁰
5 cal/(s·cm²·°C) 10.240807 Btu/(s·ft²·°F) 1.024 × 10¹
10 cal/(s·cm²·°C) 20.481614 Btu/(s·ft²·°F) 2.048 × 10¹
50 cal/(s·cm²·°C) 102.408072 Btu/(s·ft²·°F) 1.024 × 10²
100 cal/(s·cm²·°C) 204.816144 Btu/(s·ft²·°F) 2.048 × 10²
View Complete 15-Row Calorie (IT)/second/cm²/°C to BTU (IT)/second/sq. foot/°F 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 BTU (IT)/second/sq. foot/°F (Btu/(s·ft²·°F)) and Calorie (IT)/second/cm²/°C (cal/(s·cm²·°C)):

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

  • Stationary ambient air natural free convection on vertical wall 0.000245 Btu/(s·ft²·°F)
  • Forced air breeze blowing across automotive cooling radiator 0.002446 Btu/(s·ft²·°F)
  • Liquid water forced circulation inside heat exchanger pipe 0.146758 Btu/(s·ft²·°F)
  • Nucleate boiling heat transfer in pressurized steam boiler tube 0.733792 Btu/(s·ft²·°F)

Calorie (IT)/second/cm²/°C References:

  • Stationary ambient air natural free convection on vertical wall 0.000119 cal/(s·cm²·°C)
  • Forced air breeze blowing across automotive cooling radiator 0.001194 cal/(s·cm²·°C)
  • Liquid water forced circulation inside heat exchanger pipe 0.071654 cal/(s·cm²·°C)
  • Nucleate boiling heat transfer in pressurized steam boiler tube 0.358269 cal/(s·cm²·°C)

Tap any benchmark above to automatically calculate its exact equivalent in Calorie (IT)/second/cm²/°C.

ISQ Dimension: [M T⁻³ Θ⁻¹] Coherent SI Unit: watt per square meter kelvin (W/(m²·K)) Thermodynamics & Heat Transfer

How to Convert BTU (IT)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C

Converting BTU (IT)/second/sq. foot/°F (Btu/(s·ft²·°F)) to Calorie (IT)/second/cm²/°C (cal/(s·cm²·°C)) 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 BTU (IT)/second/sq. foot/°F equals 0.488243 Calorie (IT)/second/cm²/°C, while 1 cal/(s·cm²·°C) equals 2.048161 Btu/(s·ft²·°F).

Direct Factor1 Btu/(s·ft²·°F) = 0.488243 cal/(s·cm²·°C)
Inverse Ratio1 cal/(s·cm²·°C) = 2.048161 Btu/(s·ft²·°F)
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:

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 Btu/(s·ft²·°F) = 20441.748 watt per square meter kelvin (W/(m²·K))
2. Target SI Bridge (ktarget):1 cal/(s·cm²·°C) = 41868 watt per square meter kelvin (W/(m²·K))
Step-by-step substitution for BTU (IT)/second/sq. foot/°F → Calorie (IT)/second/cm²/°C:V(cal/(s·cm²·°C)) = V(Btu/(s·ft²·°F)) × ( 20441.748 / 41868 ) = V(Btu/(s·ft²·°F)) × 0.488243
Mathematical FormulaValue in Calorie (IT)/second/cm²/°C = Value in BTU (IT)/second/sq. foot/°F × 0.48824276Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 24 BTU (IT)/second/sq. foot/°F (Btu/(s·ft²·°F)) produces 11.717826 Calorie (IT)/second/cm²/°C (cal/(s·cm²·°C)). In heavy-duty utility and industrial workloads, 5000 Btu/(s·ft²·°F) equals 2441.213815 cal/(s·cm²·°C).

Inverse check: 1 cal/(s·cm²·°C) = 2.048161 Btu/(s·ft²·°F).

Understanding BTU (IT)/second/sq. foot/°F and Calorie (IT)/second/cm²/°C

BTU (IT)/second/sq. foot/°F

Btu/(s·ft²·°F)
Imperial / US

A BTU (IT)/second/sq. foot/°F (Btu/(s·ft²·°F)) is an imperial and US customary unit for heat transfer coefficient.

Applications & Practical Context

In practical heat transfer coefficient terms, a stationary ambient air natural free convection on vertical wall equals 0.000245 Btu/(s·ft²·°F), a forced air breeze blowing across automotive cooling radiator equals 0.002446 Btu/(s·ft²·°F), a liquid water forced circulation inside heat exchanger pipe equals 0.146758 Btu/(s·ft²·°F).

Physical Setup

A physical magnitude of 1 Btu/(s·ft²·°F) corresponds to 20441.748 W/(m²·K) in standard SI measurement.

Conversion to SI Unit: watt per square meter kelvin (W/(m²·K))
1 Btu/(s·ft²·°F) = 20441.748 W/(m²·K)

Calorie (IT)/second/cm²/°C

cal/(s·cm²·°C)
Standard Unit

A Calorie (IT)/second/cm²/°C (cal/(s·cm²·°C)) is a recognized unit for heat transfer coefficient.

Applications & Practical Context

In practical heat transfer coefficient terms, a stationary ambient air natural free convection on vertical wall equals 0.000119 cal/(s·cm²·°C), a forced air breeze blowing across automotive cooling radiator equals 0.001194 cal/(s·cm²·°C), a liquid water forced circulation inside heat exchanger pipe equals 0.071654 cal/(s·cm²·°C).

Physical Setup

A physical magnitude of 1 cal/(s·cm²·°C) corresponds to 41868 W/(m²·K) in standard SI measurement.

Conversion to SI Unit: watt per square meter kelvin (W/(m²·K))
1 cal/(s·cm²·°C) = 41868 W/(m²·K)

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].

q" = h × ΔT
Vector: [W/(m²·K)] × [K] → [W/m²]
Live Calculated Bridge Equivalent:
1 Btu/(s·ft²·°F) at Forced Air Duct Cooling (ΔT = 25 K) = 511043.7 W/m²
Equals 511.0437 kW/m² • 162000.0332 BTU/(h·ft²) • 12.206069 cal/(s·cm²)
SI Heat Flux
511043.7
W/m²
Watts per Square Meter
Solar / Combustion
511.0437
kW/m²
Kilowatts per Square Meter
US Building Envelope
162000.0332
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
12.206069
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
732.496
Ly/min
Langley per Minute
Furnace Flux
0.511044
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m²·K)):
    h = 1 Btu/(s·ft²·°F) × 20441.748 = 20441.748 W/(m²·K)
  2. 2. Apply Engineering Parameter (ΔT):
    Selected condition: Forced Air Duct Cooling (ΔT = 25 K) at ΔT = 25 K
  3. 3. Execute Governing Physical Law in SI Units:
    q" = h × ΔT = (20441.748 W/(m²·K)) × (25 K) = 511043.7 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 511043.7 × 1 = 511043.7 W/m² (Watts per Square Meter) • kW/m²: 511043.7 × 0.001 = 511.0437 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 511043.7 × 0.317 = 162000.0332 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 511043.7 × 2.3885 × 10⁻⁵ = 12.206069 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 511043.7 × 0.001433 = 732.496 Ly/min (Langley per Minute) • MW/m²: 511043.7 × 1 × 10⁻⁶ = 0.511044 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
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Frequently Asked Questions

There are exactly 0.48824276 calories (it)/second/cm²/°c (cal/(s·cm²·°C)) in 1 btu (it)/second/sq. foot/°f (Btu/(s·ft²·°F)). To calculate larger amounts manually, simply multiply your total number of btus (it)/second/sq. foot/°f by the conversion multiplier of 0.48824276.

The mathematical formula to convert btus (it)/second/sq. foot/°f to calories (it)/second/cm²/°c is: [value] * 0.48824276 = calories (it)/second/cm²/°c. 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 (it)/second/cm²/°c back to btus (it)/second/sq. foot/°f, you must divide your starting value by 0.48824276. Our bidirectional tool automatically computes this inverse equation the moment you type into the calorie (it)/second/cm²/°c input field.

1 Calorie (IT)/second/cm²/°C is larger than 1 BTU (IT)/second/sq. foot/°F. Specifically, 1 BTU (IT)/second/sq. foot/°F equals 0.48824276 calories (it)/second/cm²/°c, meaning 1 Calorie (IT)/second/cm²/°C is 2.0482 times larger than 1 BTU (IT)/second/sq. foot/°F (a difference of 0.31 orders of magnitude). Expressing measurements in btus (it)/second/sq. foot/°f requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 BTU (IT)/second/sq. foot/°F converts to 0.48824276 calories (it)/second/cm²/°c. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.