Convert Celsius Heat Unit per hour per square foot to Nanowatt per square metre
Convert Celsius Heat Unit per hour per square foot (CHU/(h·ft²)) to Nanowatt per square metre (nW/m²) instantly and accurately.
Conversion Formula
nW/m² = CHU/(h·ft²) × 5678263341
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 Nanowatt per square metre
The nanowatt per square metre (nW/m²) equals 10⁻⁹ W/m². Used in astrophysics and cosmology for quantifying extremely weak radiation fields, such as cosmic microwave background intensity and residual thermal emission from near-absolute-zero objects. Relevant in precision cryogenic sensor calibration. 1 nW/m² = 10⁻⁹ W/m² = 10³ pW/m².
Quick Reference Table
| Celsius Heat Unit per hour per square foot (CHU/(h·ft²)) | Nanowatt per square metre (nW/m²) |
|---|---|
| 1 CHU/(h·ft²) | 5.678 × 109 nW/m² |
| 2 CHU/(h·ft²) | 1.136 × 1010 nW/m² |
| 5 CHU/(h·ft²) | 2.839 × 1010 nW/m² |
| 10 CHU/(h·ft²) | 5.678 × 1010 nW/m² |
| 25 CHU/(h·ft²) | 1.42 × 1011 nW/m² |
| 50 CHU/(h·ft²) | 2.839 × 1011 nW/m² |
| 100 CHU/(h·ft²) | 5.678 × 1011 nW/m² |