Tog
The tog is the British unit of textile and bedding insulation, 0.1 m²·K/W: summer duvets are 4.5 tog, winter duvets 13.5 tog, and 1 clo = 1.55 tog.
Symbol: tog
Quantity: thermal resistance per unit area (insulation R-value)
SI relation: 1 tog = 0.1 m²·K/W (exact)
Derivation: 1 tog = 0.1 m²·K/W.
Exact: yes, by definition
Typical uses
- Duvet and baby sleeping-bag ratings (BS 5335)
- Textile thermal resistance
Convert tog to other units
| Conversion | 1 tog equals | Reverse |
|---|---|---|
| tog to RSI | 0.1 m²·K/W | RSI to tog |
| tog to R (US) | 0.5678263341 ft²·°F·h/BTU | R (US) to tog |
| tog to clo | 0.6451612903 clo | clo to tog |
| tog to square metre hour degree Celsius per kilocalorie | 0.1163 m²·h·°C/kcal | square metre hour degree Celsius per kilocalorie to tog |
Open the R-Value Converter (US R to RSI, m²·K/W) to convert any value between all units.
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). Tog. Retrieved October 29, 2026, from https://scientificconverters.com/units/tog/
IEEE
Scientific Converters, "Tog," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/tog/