Convert Clo to RSI (m²·K/W) (clo to m2 K/W)
1 clo = 0.155 square metre kelvin per watt (m²·K/W). 1 m²·K/W = 6.451612903 clo. Example: 1 clo = 1 × 0.155 = 0.155 m²·K/W.
Also searched as clo to m2 K/W, clo in m2 K/W, clo into square metre kelvin per watt, clo in square metre kelvin per watt, clo to square metre kelvin per watt, clo to square metre kelvin per watt converter, clo to square meter kelvin per watt and how many square metre kelvin per watt in a clo.
1 clo = 0.155 m²·K/W
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk clo to RSI converter to paste a column from Excel.
How to Convert Clo to RSI (m²·K/W)
- 1 clo = 0.155 m²·K/W
- 1 m²·K/W = 6.451612903 clo
- Example: convert 1 clo to m²·K/W: 1 clo = 1 × 0.155 m²·K/W = 0.155 m²·K/W
Formula
m²·K/W = clo × 0.155
or m²·K/W = clo ÷ 6.451612903226
Derivation from SI units:
- 1 clo = 0.155 m²·K/W (ISO 7730, ASHRAE 55).
- Thermal resistance per unit area R = thickness ÷ conductivity, in m²·K/W; U = 1/ΣR.
Both units are defined exactly, so the factor is exact. Clo definition: clo; RSI (m²·K/W) definition: square metre kelvin per watt.
Worked examples
- 1 clo is 0.155 m²·K/W.
1 clo × 0.155 = 0.155 m²·K/W - 0.5 clo is 0.0775 m²·K/W.
0.5 clo × 0.155 = 0.0775 m²·K/W
Clo to RSI (m²·K/W) conversion table
| Clo | RSI (m²·K/W) (m²·K/W) |
|---|---|
| 0.3 clo | 0.0465 m²·K/W |
| 0.5 clo | 0.0775 m²·K/W |
| 0.6 clo | 0.093 m²·K/W |
| 0.7 clo | 0.1085 m²·K/W |
| 1 clo | 0.155 m²·K/W |
| 1.2 clo | 0.186 m²·K/W |
| 1.5 clo | 0.2325 m²·K/W |
| 2 clo | 0.31 m²·K/W |
| 3 clo | 0.465 m²·K/W |
| 4 clo | 0.62 m²·K/W |
Where it's used
Clothing insulation in clo is converted to m²·K/W for heat-balance and PMV calculations. Multiply by 0.155.
Clo to other thermal resistance (r-value) units
| Conversion | 1 clo equals |
|---|---|
| clo to RSI | 0.155 m²·K/W |
| clo to R (US) | 0.8801308179 ft²·°F·h/BTU |
| clo to tog | 1.55 tog |
| clo to square metre hour degree Celsius per kilocalorie | 0.180265 m²·h·°C/kcal |
Frequently asked questions
How is the clo defined?
1 clo = 0.155 m²·K/W, the insulation that keeps a resting person comfortable at about 21 °C.
How many square metre kelvin per watt are in 1 clo?
1 clo = 0.155 m²·K/W.
How do I convert clo to square metre kelvin per watt?
Multiply the value in clo by 0.155, or divide it by 6.451612903. For example, 1 clo × 0.155 = 0.155 m²·K/W.
Is the clo to m²·K/W conversion exact?
Yes. Both units are defined exactly, and 1 clo is exactly 0.155 m²·K/W.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "clo".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Clo to RSI (m²·K/W) (clo to m2 K/W). Retrieved October 29, 2026, from https://scientificconverters.com/thermal-resistance/clo-to-rsi/
IEEE
Scientific Converters, "Convert Clo to RSI (m²·K/W) (clo to m2 K/W)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/thermal-resistance/clo-to-rsi/