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

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Live Conversion • ISO 80000-5:2019 Certified
1 Btu (th)/minute/sq. foot = 0.016666673 BTU (th)/second/sq. foot
1 Btu(th)/(min·ft²) = 0.0166667 Btu/(s·ft²) • 1 Btu/(s·ft²) = 59.999977 Btu(th)/(min·ft²)
Btu (th)/minute/sq. foot to BTU (th)/second/sq. foot: One Btu (th)/minute/sq. foot is equal to 0.016666673 Btus (th)/second/sq. foot.
Certified Authority Value
0.01666667
Btu/(s·ft²)
Exact: 1 Btu/(s·ft²) ≡ 59.9999770812 Btu(th)/(min·ft²)
Btu(th)/(min·ft²)
Btu(th)/(min·ft²)
Swap to BTU (th)/second/sq. foot to Btu (th)/minute/sq. foot
Swap to BTU (th)/second/sq. foot to Btu (th)/minute/sq. foot
Btu/(s·ft²)
Btu/(s·ft²) 0.016666673
Quick Values:
Conversion Formula
To convert Btu (th)/minute/sq. foot to BTU (th)/second/sq. foot, multiply by 0.016666673
Btu(th)/(min·ft²) × 0.016666673 = Btu/(s·ft²)

Calculation: 1 Btu(th)/(min·ft²) × 0.016666673 = 0.016666673 Btu/(s·ft²)

Common Btu (th)/minute/sq. foot to BTU (th)/second/sq. foot Calculations

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

Tap any row to calculate
Btu (th)/minute/sq. foot to BTU (th)/second/sq. foot: Primary Direct Table (15 Steps)
Btu (th)/minute/sq. foot to BTU (th)/second/sq. foot Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 Btu(th)/(min·ft²) 1.666667 × 10⁻⁵ Btu/(s·ft²) 1.667 × 10⁻⁵
0.01 Btu(th)/(min·ft²) 0.000166667 Btu/(s·ft²) 1.667 × 10⁻⁴
0.1 Btu(th)/(min·ft²) 0.00166667 Btu/(s·ft²) 1.667 × 10⁻³
0.5 Btu(th)/(min·ft²) 0.00833334 Btu/(s·ft²) 8.333 × 10⁻³
1 Btu(th)/(min·ft²) 0.0166667 Btu/(s·ft²) 1.667 × 10⁻²
2 Btu(th)/(min·ft²) 0.0333333 Btu/(s·ft²) 3.333 × 10⁻²
5 Btu(th)/(min·ft²) 0.0833334 Btu/(s·ft²) 8.333 × 10⁻²
10 Btu(th)/(min·ft²) 0.166667 Btu/(s·ft²) 1.667 × 10⁻¹
20 Btu(th)/(min·ft²) 0.333333 Btu/(s·ft²) 3.333 × 10⁻¹
25 Btu(th)/(min·ft²) 0.416667 Btu/(s·ft²) 4.167 × 10⁻¹
50 Btu(th)/(min·ft²) 0.833334 Btu/(s·ft²) 8.333 × 10⁻¹
100 Btu(th)/(min·ft²) 1.666667 Btu/(s·ft²) 1.667 × 10⁰
250 Btu(th)/(min·ft²) 4.166668 Btu/(s·ft²) 4.167 × 10⁰
500 Btu(th)/(min·ft²) 8.333337 Btu/(s·ft²) 8.333 × 10⁰
1000 Btu(th)/(min·ft²) 16.666673 Btu/(s·ft²) 1.667 × 10¹
BTU (th)/second/sq. foot to Btu (th)/minute/sq. foot: Reciprocal Summary
BTU (th)/second/sq. foot to Btu (th)/minute/sq. foot Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 Btu/(s·ft²) 59.999977 Btu(th)/(min·ft²) 6 × 10¹
5 Btu/(s·ft²) 299.999885 Btu(th)/(min·ft²) 3 × 10²
10 Btu/(s·ft²) 599.999771 Btu(th)/(min·ft²) 6 × 10²
50 Btu/(s·ft²) 2999.998854 Btu(th)/(min·ft²) 3 × 10³
100 Btu/(s·ft²) 5999.997708 Btu(th)/(min·ft²) 6 × 10³
View Complete 15-Row BTU (th)/second/sq. foot to Btu (th)/minute/sq. 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/sq. foot (Btu(th)/(min·ft²)) and BTU (th)/second/sq. foot (Btu/(s·ft²)):

Btu (th)/minute/sq. foot References:

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 7.1954 Btu(th)/(min·ft²)
  • Clear sky direct midday summer sunlight striking sea level ground 5.2868 Btu(th)/(min·ft²)
  • Human body resting thermal metabolic heat radiation to room 0.264342 Btu(th)/(min·ft²)
  • Overcast winter day diffuse solar irradiance at sea level 0.528684 Btu(th)/(min·ft²)

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

  • Solar constant extraterrestrial solar irradiance at top of atmosphere 0.119923 Btu/(s·ft²)
  • Clear sky direct midday summer sunlight striking sea level ground 0.088114 Btu/(s·ft²)
  • Human body resting thermal metabolic heat radiation to room 0.004406 Btu/(s·ft²)
  • Overcast winter day diffuse solar irradiance at sea level 0.008811 Btu/(s·ft²)

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

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

How to Convert Btu (th)/minute/sq. foot to BTU (th)/second/sq. foot

Converting Btu (th)/minute/sq. foot (Btu(th)/(min·ft²)) to BTU (th)/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 Btu (th)/minute/sq. foot equals 0.0166667 BTU (th)/second/sq. foot, while 1 Btu/(s·ft²) equals 59.999977 Btu(th)/(min·ft²).

Direct Factor1 Btu(th)/(min·ft²) = 0.0166667 Btu/(s·ft²)
Inverse Ratio1 Btu/(s·ft²) = 59.999977 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) = 189.148906 watt per square meter (W/m²)
2. Target SI Bridge (ktarget):1 Btu/(s·ft²) = 11348.93 watt per square meter (W/m²)
Step-by-step substitution for Btu (th)/minute/sq. foot → BTU (th)/second/sq. foot:V(Btu/(s·ft²)) = V(Btu(th)/(min·ft²)) × ( 189.148906 / 11348.93 ) = V(Btu(th)/(min·ft²)) × 0.0166667
Mathematical FormulaValue in BTU (th)/second/sq. foot = Value in Btu (th)/minute/sq. foot × 0.016666673Direct computational formula applied for standard conversion.
Worked Example

Converting 250 Btu(th)/(min·ft²) yields an exact output of 4.166668 Btu/(s·ft²) in BTU (th)/second/sq. foot. Under higher industrial throughput, 480 Btu(th)/(min·ft²) translates to 8.000003 Btu/(s·ft²).

Inverse check: 1 Btu/(s·ft²) = 59.999977 Btu(th)/(min·ft²).

Understanding Btu (th)/minute/sq. foot and BTU (th)/second/sq. foot

Btu (th)/minute/sq. foot

Btu(th)/(min·ft²)
Imperial / US

A Btu (th)/minute/sq. 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 solar constant extraterrestrial solar irradiance at top of atmosphere equals 7.1954 Btu(th)/(min·ft²), a clear sky direct midday summer sunlight striking sea level ground equals 5.2868 Btu(th)/(min·ft²), a human body resting thermal metabolic heat radiation to room equals 0.264342 Btu(th)/(min·ft²).

Physical Setup

A physical magnitude of 1 Btu(th)/(min·ft²) corresponds to 189.148906 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 Btu(th)/(min·ft²) = 189.148906 W/m²

BTU (th)/second/sq. foot

Btu/(s·ft²)
Imperial / US

A BTU (th)/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 0.119923 Btu/(s·ft²), a clear sky direct midday summer sunlight striking sea level ground equals 0.088114 Btu/(s·ft²), a human body resting thermal metabolic heat radiation to room equals 0.004406 Btu/(s·ft²).

Physical Setup

A physical magnitude of 1 Btu/(s·ft²) corresponds to 11348.93 W/m² in standard SI measurement.

Conversion to SI Unit: watt per square meter (W/m²)
1 Btu/(s·ft²) = 11348.93 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) = 1513.1912 W
Equals 1.5132 kW • 0.00151319 MW • 2.0292 hp
SI Power
1513.1912
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) × 189.14890558 = 189.14890558 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 = (189.14890558 W/m²) × (8 m²) = 1513.191245 W
  4. 4. Convert to Standard Engineering Units:
    • W: 1513.191245 × 1 = 1513.1912 W (Watts) • kW: 1513.191245 × 0.001 = 1.5132 kW (Kilowatts) • MW: 1513.191245 × 1 × 10⁻⁶ = 0.00151319 MW (Megawatts) • hp: 1513.191245 × 0.001341 = 2.0292 hp (Horsepower (Mechanical)) • PS: 1513.191245 × 0.00136 = 2.0574 PS (Metric Horsepower (PS)) • BTU/h: 1513.191245 × 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 0.016666673 btus (th)/second/sq. foot (Btu/(s·ft²)) in 1 btu (th)/minute/sq. foot (Btu(th)/(min·ft²)). To calculate larger amounts manually, simply multiply your total number of btus (th)/minute/sq. foot by the conversion multiplier of 0.016666673.

The mathematical formula to convert btus (th)/minute/sq. foot to btus (th)/second/sq. foot is: [value] * 0.016666673 = btus (th)/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 (th)/second/sq. foot back to btus (th)/minute/sq. foot, you must divide your starting value by 0.016666673. Our bidirectional tool automatically computes this inverse equation the moment you type into the btu (th)/second/sq. foot input field.

1 BTU (th)/second/sq. foot is larger than 1 Btu (th)/minute/sq. foot. Specifically, 1 Btu (th)/minute/sq. foot equals 0.016666673 btus (th)/second/sq. foot, meaning 1 BTU (th)/second/sq. foot is 60 times larger than 1 Btu (th)/minute/sq. foot (a difference of 1.78 orders of magnitude). Expressing measurements in btus (th)/minute/sq. foot requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Btu (th)/minute/sq. foot converts to 0.016666673 btus (th)/second/sq. foot. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.