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Btus (th)/minute/square foot to Btus (th)/second/square inch Converter (Btu (th)/(min·ft²) to Btu (th)/(s·in²))

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Live Conversion • ISO 80000-5:2019 Certified
1 Btu (th)/minute/square foot = 0.00011574019 Btu (th)/second/square inch
1 Btu (th)/(min·ft²) = 0.00011574 Btu (th)/(s·in²) • 1 Btu (th)/(s·in²) = 8640.041156 Btu (th)/(min·ft²)
Btu (th)/minute/square foot to Btu (th)/second/square inch: One Btu (th)/minute/square foot is equal to 0.00011574019 Btus (th)/second/square inch.
Certified Authority Value
0.00011574
Btu (th)/(s·in²)
Exact: 1 Btu (th)/(s·in²) ≡ 8640.041156027 Btu (th)/(min·ft²)
Btu (th)/(min·ft²)
Btu (th)/(min·ft²)
Swap to Btu (th)/second/square inch to Btu (th)/minute/square foot
Swap to Btu (th)/second/square inch to Btu (th)/minute/square foot
Btu (th)/(s·in²)
Btu (th)/(s·in²) 0.00011574019
Quick Values:
Conversion Formula
To convert Btu (th)/minute/square foot to Btu (th)/second/square inch, multiply by 0.00011574019
Btu (th)/(min·ft²) × 0.00011574019 = Btu (th)/(s·in²)

Calculation: 1 Btu (th)/(min·ft²) × 0.00011574019 = 0.00011574019 Btu (th)/(s·in²)

Common Btu (th)/minute/square foot to Btu (th)/second/square inch Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Btu (th)/minute/square foot (Btu (th)/(min·ft²)) and Btu (th)/second/square inch (Btu (th)/(s·in²)).

Tap any row to calculate
Btu (th)/minute/square foot to Btu (th)/second/square inch: Primary Direct Table (15 Steps)
Btu (th)/minute/square foot to Btu (th)/second/square inch Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 Btu (th)/(min·ft²) 1.157402 × 10⁻⁷ Btu (th)/(s·in²) 1.157 × 10⁻⁷
0.01 Btu (th)/(min·ft²) 1.157402 × 10⁻⁶ Btu (th)/(s·in²) 1.157 × 10⁻⁶
0.1 Btu (th)/(min·ft²) 1.157402 × 10⁻⁵ Btu (th)/(s·in²) 1.157 × 10⁻⁵
0.5 Btu (th)/(min·ft²) 5.787009 × 10⁻⁵ Btu (th)/(s·in²) 5.787 × 10⁻⁵
1 Btu (th)/(min·ft²) 0.00011574 Btu (th)/(s·in²) 1.157 × 10⁻⁴
2 Btu (th)/(min·ft²) 0.00023148 Btu (th)/(s·in²) 2.315 × 10⁻⁴
5 Btu (th)/(min·ft²) 0.000578701 Btu (th)/(s·in²) 5.787 × 10⁻⁴
10 Btu (th)/(min·ft²) 0.0011574 Btu (th)/(s·in²) 1.157 × 10⁻³
20 Btu (th)/(min·ft²) 0.0023148 Btu (th)/(s·in²) 2.315 × 10⁻³
25 Btu (th)/(min·ft²) 0.0028935 Btu (th)/(s·in²) 2.894 × 10⁻³
50 Btu (th)/(min·ft²) 0.00578701 Btu (th)/(s·in²) 5.787 × 10⁻³
100 Btu (th)/(min·ft²) 0.011574 Btu (th)/(s·in²) 1.157 × 10⁻²
250 Btu (th)/(min·ft²) 0.028935 Btu (th)/(s·in²) 2.894 × 10⁻²
500 Btu (th)/(min·ft²) 0.0578701 Btu (th)/(s·in²) 5.787 × 10⁻²
1000 Btu (th)/(min·ft²) 0.11574 Btu (th)/(s·in²) 1.157 × 10⁻¹
Btu (th)/second/square inch to Btu (th)/minute/square foot: Reciprocal Summary
Btu (th)/second/square inch to Btu (th)/minute/square foot Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu (th)/(s·in²) 8640.041156 Btu (th)/(min·ft²) 8.64 × 10³
5 Btu (th)/(s·in²) 43200.20578 Btu (th)/(min·ft²) 4.32 × 10⁴
10 Btu (th)/(s·in²) 86400.41156 Btu (th)/(min·ft²) 8.64 × 10⁴
50 Btu (th)/(s·in²) 432002.057801 Btu (th)/(min·ft²) 4.32 × 10⁵
100 Btu (th)/(s·in²) 864004.115603 Btu (th)/(min·ft²) 8.64 × 10⁵
View Complete 15-Row Btu (th)/second/square inch to Btu (th)/minute/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 Btu (th)/minute/square foot (Btu (th)/(min·ft²)) and Btu (th)/second/square inch (Btu (th)/(s·in²)):

Btu (th)/minute/square foot References:

  • Industrial foundry molten steel ladle preheating burner flux 45 Btu (th)/(min·ft²)

Btu (th)/second/square inch References:

  • Gas turbine first-stage stationary nozzle guide vane heat flux 0.5 Btu (th)/(s·in²)

Tap any benchmark above to automatically calculate its exact equivalent in Btu (th)/second/square inch.

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

How to Convert Btu (th)/minute/square foot to Btu (th)/second/square inch

Converting Btu (th)/minute/square foot (Btu (th)/(min·ft²)) to Btu (th)/second/square inch (Btu (th)/(s·in²)) 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 Btu (th)/minute/square foot equals 0.00011574 Btu (th)/second/square inch, while 1 Btu (th)/(s·in²) equals 8640.041156 Btu (th)/(min·ft²).

Direct Factor1 Btu (th)/(min·ft²) = 0.00011574 Btu (th)/(s·in²)
Inverse Ratio1 Btu (th)/(s·in²) = 8640.041156 Btu (th)/(min·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 Btu (th)/(min·ft²) = 189.148863 watt per square meter (W/m²)
2. Target SI Bridge (ktarget):1 Btu (th)/(s·in²) = 1634253.963066 watt per square meter (W/m²)
Step-by-step substitution for Btu (th)/minute/square foot → Btu (th)/second/square inch:V(Btu (th)/(s·in²)) = V(Btu (th)/(min·ft²)) × ( 189.148863 / 1634253.963066 ) = V(Btu (th)/(min·ft²)) × 0.00011574
Mathematical FormulaValue in Btu (th)/second/square inch = Value in Btu (th)/minute/square foot × 0.00011574019Direct computational formula applied for standard conversion.
Worked Example

Evaluating an input of 120 Btu (th)/minute/square foot (Btu (th)/(min·ft²)) produces 0.0138888 Btu (th)/second/square inch (Btu (th)/(s·in²)). In heavy-duty utility and industrial workloads, 1000 Btu (th)/(min·ft²) equals 0.11574 Btu (th)/(s·in²).

Inverse check: 1 Btu (th)/(s·in²) = 8640.041156 Btu (th)/(min·ft²).

Understanding Btu (th)/minute/square foot and Btu (th)/second/square inch

Btu (th)/minute/square foot

Btu (th)/(min·ft²)
Imperial / US

A Btu (th)/minute/square foot (Btu (th)/(min·ft²)) is an imperial and US customary unit for heat flux density.

Applications & Practical Context

In practical heat flux density terms, a industrial foundry molten steel ladle preheating burner flux equals 45 Btu (th)/(min·ft²).

Physical Setup

A physical magnitude of 1 Btu (th)/(min·ft²) corresponds to 189.148863 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 Btu (th)/(min·ft²) = 189.148863 W/m²

Btu (th)/second/square inch

Btu (th)/(s·in²)
Imperial / US

A Btu (th)/second/square inch (Btu (th)/(s·in²)) is an imperial and US customary unit for heat flux density.

Applications & Practical Context

In practical heat flux density terms, a gas turbine first-stage stationary nozzle guide vane heat flux equals 0.5 Btu (th)/(s·in²).

Physical Setup

A physical magnitude of 1 Btu (th)/(s·in²) corresponds to 1634253.963066 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 Btu (th)/(s·in²) = 1634253.963066 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 Btu (th)/(min·ft²) at Industrial Hydronic Radiator Panel (8 m²) = 1513.1909 W
Equals 1.5132 kW • 0.00151319 MW • 2.0292 hp
SI Power
1513.1909
W
Watts
Grid / Utility
1.5132
kW
Kilowatts
Power Plant
0.00151319
MW
Megawatts
Mechanical Rating
2.0292
hp
Horsepower (Mechanical)
Metric Horsepower
2.0574
PS
Metric Horsepower (PS)
HVAC Thermal Rating
5163.22
BTU/h
BTU per Hour
  1. 1. Normalize Input to SI Base Unit (W/m²):
    q" = 1 Btu (th)/(min·ft²) × 189.14886325 = 189.14886325 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 = (189.14886325 W/m²) × (8 m²) = 1513.190906 W
  4. 4. Convert to Standard Engineering Units:
    • W: 1513.190906 × 1 = 1513.1909 W (Watts) • kW: 1513.190906 × 0.001 = 1.5132 kW (Kilowatts) • MW: 1513.190906 × 1 × 10⁻⁶ = 0.00151319 MW (Megawatts) • hp: 1513.190906 × 0.001341 = 2.0292 hp (Horsepower (Mechanical)) • PS: 1513.190906 × 0.00136 = 2.0574 PS (Metric Horsepower (PS)) • BTU/h: 1513.190906 × 3.4121 = 5163.22 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 0.00011574019 btus (th)/second/square inch (Btu (th)/(s·in²)) in 1 btu (th)/minute/square foot (Btu (th)/(min·ft²)). To calculate larger amounts manually, simply multiply your total number of btus (th)/minute/square foot by the conversion multiplier of 0.00011574019.

The mathematical formula to convert btus (th)/minute/square foot to btus (th)/second/square inch is: [value] * 0.00011574019 = btus (th)/second/square inch. 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/square inch back to btus (th)/minute/square foot, you must divide your starting value by 0.00011574019. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (th)/second/square inch input field.

1 Btu (th)/second/square inch is larger than 1 Btu (th)/minute/square foot. Specifically, 1 Btu (th)/minute/square foot equals 0.00011574019 btus (th)/second/square inch, meaning 1 Btu (th)/second/square inch is 8640.0412 times larger than 1 Btu (th)/minute/square foot (a difference of 3.94 orders of magnitude). Expressing measurements in btus (th)/minute/square foot requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Btu (th)/minute/square foot converts to 0.00011574019 btus (th)/second/square inch. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.