Convert Celsius Heat Unit per hour per square foot to Milliwatt per square metre

Convert Celsius Heat Unit per hour per square foot (CHU/(h·ft²)) to Milliwatt per square metre (mW/m²) instantly and accurately.

Celsius Heat Unit per hour per square foot (CHU/(h·ft²))
Milliwatt per square metre (mW/m²)

Conversion Formula

mW/m² = CHU/(h·ft²) × 5678.263341

About Celsius Heat Unit per hour per square foot

The Celsius heat unit per hour per square foot (CHU/(h·ft²)) equals (9/5)×1055.05585262/(3600×0.09290304) ≈ 5.6783 W/m². The CHU (= 9/5 BTU(IT)) uses a 1 °C temperature interval instead of 1 °F; historically used in UK and Canadian heating engineering. 1 CHU/(h·ft²) ≈ 5.6783 W/m² = (9/5) × BTU(IT)/(h·ft²).

About Milliwatt per square metre

The milliwatt per square metre (mW/m²) equals 10⁻³ W/m². Relevant in geothermal surveys: global average continental heat flux ≈ 65 mW/m², oceanic ≈ 101 mW/m². Used in building physics for quantifying very small heat leakage through ultra-high-performance insulation. 1 mW/m² = 10⁻³ W/m² = 1 erg/(s·cm²).

Quick Reference Table

Celsius Heat Unit per hour per square foot (CHU/(h·ft²))Milliwatt per square metre (mW/m²)
1 CHU/(h·ft²)5678.26 mW/m²
2 CHU/(h·ft²)11356.5 mW/m²
5 CHU/(h·ft²)28391.3 mW/m²
10 CHU/(h·ft²)56782.6 mW/m²
25 CHU/(h·ft²)141957 mW/m²
50 CHU/(h·ft²)283913 mW/m²
100 CHU/(h·ft²)567826 mW/m²

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