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

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Live Conversion • ISO 80000-5:2019 Certified
1 Calorie (IT)/second/cm²/°C = 2.04953182 BTU (th)/second/sq. foot/°F
1 cal/(s·cm²·°C) = 2.049532 Btu (th)/(s·ft²·°F) • 1 Btu (th)/(s·ft²·°F) = 0.487916 cal/(s·cm²·°C)
Calorie (IT)/second/cm²/°C to BTU (th)/second/sq. foot/°F: One Calorie (IT)/second/cm²/°C is equal to 2.04953182 Btus (th)/second/sq. foot/°F.
Certified Authority Value
2.04953182
Btu (th)/(s·ft²·°F)
Exact: 1 Btu (th)/(s·ft²·°F) ≡ 0.4879163084 cal/(s·cm²·°C)
cal/(s·cm²·°C)
cal/(s·cm²·°C)
Swap to BTU (th)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C
Swap to BTU (th)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C
Btu (th)/(s·ft²·°F)
Btu (th)/(s·ft²·°F) 2.04953182
Quick Values:
Conversion Formula
To convert Calorie (IT)/second/cm²/°C to BTU (th)/second/sq. foot/°F, multiply by 2.04953182
cal/(s·cm²·°C) × 2.04953182 = Btu (th)/(s·ft²·°F)

Calculation: 1 cal/(s·cm²·°C) × 2.04953182 = 2.04953182 Btu (th)/(s·ft²·°F)

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

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

Tap any row to calculate
Calorie (IT)/second/cm²/°C to BTU (th)/second/sq. foot/°F: Primary Direct Table (15 Steps)
Calorie (IT)/second/cm²/°C to BTU (th)/second/sq. foot/°F Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 cal/(s·cm²·°C) 0.00204953 Btu (th)/(s·ft²·°F) 2.05 × 10⁻³
0.01 cal/(s·cm²·°C) 0.0204953 Btu (th)/(s·ft²·°F) 2.05 × 10⁻²
0.1 cal/(s·cm²·°C) 0.204953 Btu (th)/(s·ft²·°F) 2.05 × 10⁻¹
0.5 cal/(s·cm²·°C) 1.024766 Btu (th)/(s·ft²·°F) 1.025 × 10⁰
1 cal/(s·cm²·°C) 2.049532 Btu (th)/(s·ft²·°F) 2.05 × 10⁰
2 cal/(s·cm²·°C) 4.099064 Btu (th)/(s·ft²·°F) 4.099 × 10⁰
5 cal/(s·cm²·°C) 10.247659 Btu (th)/(s·ft²·°F) 1.025 × 10¹
10 cal/(s·cm²·°C) 20.495318 Btu (th)/(s·ft²·°F) 2.05 × 10¹
20 cal/(s·cm²·°C) 40.990636 Btu (th)/(s·ft²·°F) 4.099 × 10¹
25 cal/(s·cm²·°C) 51.238296 Btu (th)/(s·ft²·°F) 5.124 × 10¹
50 cal/(s·cm²·°C) 102.476591 Btu (th)/(s·ft²·°F) 1.025 × 10²
100 cal/(s·cm²·°C) 204.953182 Btu (th)/(s·ft²·°F) 2.05 × 10²
250 cal/(s·cm²·°C) 512.382955 Btu (th)/(s·ft²·°F) 5.124 × 10²
500 cal/(s·cm²·°C) 1024.76591 Btu (th)/(s·ft²·°F) 1.025 × 10³
1000 cal/(s·cm²·°C) 2049.531821 Btu (th)/(s·ft²·°F) 2.05 × 10³
BTU (th)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C: Reciprocal Summary
BTU (th)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu (th)/(s·ft²·°F) 0.487916 cal/(s·cm²·°C) 4.879 × 10⁻¹
5 Btu (th)/(s·ft²·°F) 2.439582 cal/(s·cm²·°C) 2.44 × 10⁰
10 Btu (th)/(s·ft²·°F) 4.879163 cal/(s·cm²·°C) 4.879 × 10⁰
50 Btu (th)/(s·ft²·°F) 24.395815 cal/(s·cm²·°C) 2.44 × 10¹
100 Btu (th)/(s·ft²·°F) 48.791631 cal/(s·cm²·°C) 4.879 × 10¹
View Complete 15-Row BTU (th)/second/sq. foot/°F to Calorie (IT)/second/cm²/°C 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 (IT)/second/cm²/°C (cal/(s·cm²·°C)) and BTU (th)/second/sq. foot/°F (Btu (th)/(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)

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

  • Stationary ambient air natural free convection on vertical wall 0.000245 Btu (th)/(s·ft²·°F)
  • Forced air breeze blowing across automotive cooling radiator 0.002448 Btu (th)/(s·ft²·°F)
  • Liquid water forced circulation inside heat exchanger pipe 0.146857 Btu (th)/(s·ft²·°F)
  • Nucleate boiling heat transfer in pressurized steam boiler tube 0.734283 Btu (th)/(s·ft²·°F)

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

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

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

Converting Calorie (IT)/second/cm²/°C (cal/(s·cm²·°C)) to BTU (th)/second/sq. foot/°F (Btu (th)/(s·ft²·°F)) 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 Calorie (IT)/second/cm²/°C equals 2.049532 BTU (th)/second/sq. foot/°F, while 1 Btu (th)/(s·ft²·°F) equals 0.487916 cal/(s·cm²·°C).

Direct Factor1 cal/(s·cm²·°C) = 2.049532 Btu (th)/(s·ft²·°F)
Inverse Ratio1 Btu (th)/(s·ft²·°F) = 0.487916 cal/(s·cm²·°C)
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 cal/(s·cm²·°C) = 41868 watt per square meter kelvin (W/(m²·K))
2. Target SI Bridge (ktarget):1 Btu (th)/(s·ft²·°F) = 20428.08 watt per square meter kelvin (W/(m²·K))
Step-by-step substitution for Calorie (IT)/second/cm²/°C → BTU (th)/second/sq. foot/°F:V(Btu (th)/(s·ft²·°F)) = V(cal/(s·cm²·°C)) × ( 41868 / 20428.08 ) = V(cal/(s·cm²·°C)) × 2.049532
Mathematical FormulaValue in BTU (th)/second/sq. foot/°F = Value in Calorie (IT)/second/cm²/°C × 2.04953182Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 12 Calorie (IT)/second/cm²/°C (cal/(s·cm²·°C)) produces 24.594382 BTU (th)/second/sq. foot/°F (Btu (th)/(s·ft²·°F)). In heavy-duty utility and industrial workloads, 240 cal/(s·cm²·°C) equals 491.887637 Btu (th)/(s·ft²·°F).

Inverse check: 1 Btu (th)/(s·ft²·°F) = 0.487916 cal/(s·cm²·°C).

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

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)

BTU (th)/second/sq. foot/°F

Btu (th)/(s·ft²·°F)
Imperial / US

A BTU (th)/second/sq. foot/°F (Btu (th)/(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 (th)/(s·ft²·°F), a forced air breeze blowing across automotive cooling radiator equals 0.002448 Btu (th)/(s·ft²·°F), a liquid water forced circulation inside heat exchanger pipe equals 0.146857 Btu (th)/(s·ft²·°F).

Physical Setup

A physical magnitude of 1 Btu (th)/(s·ft²·°F) corresponds to 20428.08 W/(m²·K) in standard SI measurement.

Conversion to SI Unit: watt per square meter kelvin (W/(m²·K))
1 Btu (th)/(s·ft²·°F) = 20428.08 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 cal/(s·cm²·°C) at Forced Air Duct Cooling (ΔT = 25 K) = 1046700 W/m²
Equals 1046.7 kW/m² • 331802.2211 BTU/(h·ft²) • 25 cal/(s·cm²)
SI Heat Flux
1046700
W/m²
Watts per Square Meter
Solar / Combustion
1046.7
kW/m²
Kilowatts per Square Meter
US Building Envelope
331802.2211
BTU/(h·ft²)
BTU per Hour Sq. Foot
CGS Thermal
25
cal/(s·cm²)
Calories per Second Sq. Cm
Meteorology
1500.27
Ly/min
Langley per Minute
Furnace Flux
1.0467
MW/m²
Megawatts per Square Meter
  1. 1. Normalize Input to SI Base Unit (W/(m²·K)):
    h = 1 cal/(s·cm²·°C) × 41868 = 41868 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 = (41868 W/(m²·K)) × (25 K) = 1046700 W/m²
  4. 4. Convert to Standard Engineering Units:
    • W/m²: 1046700 × 1 = 1046700 W/m² (Watts per Square Meter) • kW/m²: 1046700 × 0.001 = 1046.7 kW/m² (Kilowatts per Square Meter) • BTU/(h·ft²): 1046700 × 0.317 = 331802.2211 BTU/(h·ft²) (BTU per Hour Sq. Foot) • cal/(s·cm²): 1046700 × 2.3885 × 10⁻⁵ = 25 cal/(s·cm²) (Calories per Second Sq. Cm) • Ly/min: 1046700 × 0.001433 = 1500.27 Ly/min (Langley per Minute) • MW/m²: 1046700 × 1 × 10⁻⁶ = 1.0467 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 2.04953182 btus (th)/second/sq. foot/°f (Btu (th)/(s·ft²·°F)) in 1 calorie (it)/second/cm²/°c (cal/(s·cm²·°C)). To calculate larger amounts manually, simply multiply your total number of calories (it)/second/cm²/°c by the conversion multiplier of 2.04953182.

The mathematical formula to convert calories (it)/second/cm²/°c to btus (th)/second/sq. foot/°f is: [value] * 2.04953182 = btus (th)/second/sq. foot/°f. 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 (th)/second/sq. foot/°f back to calories (it)/second/cm²/°c, you must divide your starting value by 2.04953182. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (th)/second/sq. foot/°f input field.

1 Calorie (IT)/second/cm²/°C is larger than 1 BTU (th)/second/sq. foot/°F. Specifically, 1 Calorie (IT)/second/cm²/°C equals exactly 2.04953182 btus (th)/second/sq. foot/°f, making it 2.0495 times larger (a difference of 0.31 orders of magnitude). Therefore, quantities expressed in btus (th)/second/sq. foot/°f require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 Calorie (IT)/second/cm²/°C converts to 2.04953182 btus (th)/second/sq. foot/°f. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.