Convert RSI (m²·K/W) to Tog (m2 K/W to tog)
1 square metre kelvin per watt (m²·K/W) = 10 tog. 1 tog = 0.1 m²·K/W. Example: 15 m²·K/W = 15 × 10 = 150 tog.
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1 m²·K/W = 10 tog
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk RSI to tog converter to paste a column from Excel.
How to Convert RSI (m²·K/W) to Tog
- 1 m²·K/W = 10 tog
- 1 tog = 0.1 m²·K/W
- Example: convert 15 m²·K/W to tog: 15 m²·K/W = 15 × 10 tog = 150 tog
Formula
tog = m²·K/W × 10
Derivation from SI units:
- Thermal resistance per unit area R = thickness ÷ conductivity, in m²·K/W; U = 1/ΣR.
- 1 tog = 0.1 m²·K/W.
Both units are defined exactly, so the factor is exact. RSI (m²·K/W) definition: square metre kelvin per watt; Tog definition: tog.
Worked examples
- A reading of 1.5 m²·K/W converts to 15 tog.
1.5 m²·K/W × 10 = 15 tog - A value of 3 m²·K/W is 30 tog.
3 m²·K/W × 10 = 30 tog
RSI (m²·K/W) to Tog conversion table
| RSI (m²·K/W) (m²·K/W) | Tog |
|---|---|
| 0.1 m²·K/W | 1 tog |
| 0.5 m²·K/W | 5 tog |
| 1 m²·K/W | 10 tog |
| 1.5 m²·K/W | 15 tog |
| 2 m²·K/W | 20 tog |
| 2.5 m²·K/W | 25 tog |
| 3 m²·K/W | 30 tog |
| 4 m²·K/W | 40 tog |
| 5 m²·K/W | 50 tog |
| 7 m²·K/W | 70 tog |
Where it's used
RSI (m²·K/W) are used for building envelope design (ECBC, Part L, EN ISO 6946), while tog appear in duvet and baby sleeping-bag ratings (BS 5335). Both measure thermal resistance per unit area (insulation R-value), so the conversion is a fixed factor.
RSI (m²·K/W) to other thermal resistance (r-value) units
| Conversion | 1 m²·K/W equals |
|---|---|
| RSI to tog | 10 tog |
| RSI to R (US) | 5.678263341 ft²·°F·h/BTU |
| RSI to clo | 6.451612903 clo |
| RSI to square metre hour degree Celsius per kilocalorie | 1.163 m²·h·°C/kcal |
Frequently asked questions
How many tog are in 1 square metre kelvin per watt?
1 m²·K/W = 10 tog.
How do I convert square metre kelvin per watt to tog?
Multiply the value in m²·K/W by 10. For example, 15 m²·K/W × 10 = 150 tog.
Is the m²·K/W to tog conversion exact?
Yes. Both units are defined exactly, and 1 m²·K/W is exactly 10 tog.
Sources
- 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 RSI (m²·K/W) to Tog (m2 K/W to tog). Retrieved October 29, 2026, from https://scientificconverters.com/thermal-resistance/rsi-to-tog/
IEEE
Scientific Converters, "Convert RSI (m²·K/W) to Tog (m2 K/W to tog)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/thermal-resistance/rsi-to-tog/