Convert Togs to R-values (US)
1 tog = 0.56782633 r-values (us). Multiply the number of togs by 0.567826334111.
1 tog = 0.5678263341 ft²·°F·h/BTU
Multiply the number of togs by 0.567826334111.
Results are rounded for display. Double-check values for critical work.
Popular thermal resistance (r-value) conversions
Togs to R-values (US) table
| Togs | R-values (US) |
|---|---|
| 1 tog | 0.56782633 ft²·°F·h/BTU |
| 2 tog | 1.1356527 ft²·°F·h/BTU |
| 3 tog | 1.703479 ft²·°F·h/BTU |
| 4 tog | 2.2713053 ft²·°F·h/BTU |
| 5 tog | 2.8391317 ft²·°F·h/BTU |
| 10 tog | 5.6782633 ft²·°F·h/BTU |
| 20 tog | 11.356527 ft²·°F·h/BTU |
| 25 tog | 14.195658 ft²·°F·h/BTU |
| 50 tog | 28.391317 ft²·°F·h/BTU |
| 100 tog | 56.782633 ft²·°F·h/BTU |
| 500 tog | 283.91317 ft²·°F·h/BTU |
| 1000 tog | 567.82633 ft²·°F·h/BTU |
Togs to R-values (US) in your head
Multiply by 4, then divide by 7.
That lands within 0.6% of the exact value.
10 tog → 5.71429 ft²·°F·h/BTU in your head, 5.67826 ft²·°F·h/BTU exactly.
About these units
The tog (tog) is a specialist or regional unit of thermal resistance, equal to 0.1 square meter kelvins per watt (rsi).
The r-value (us) (ft²·°F·h/BTU) is a US customary unit of thermal resistance, equal to 0.17611018 square meter kelvins per watt (rsi).
Going the other way, 1 r-value (us) = 1.7611018 togs. Thermal insulance, better known as the R-value, measures how well a layer resists heat flow. It is the reciprocal of the U-value. US building products are labelled in ft²·°F·h/BTU, the rest of the world uses m²·K/W (RSI), duvets are sold by tog and clothing is rated in clo. Higher numbers insulate better.
Frequently asked
- How many r-values (us) are in a tog?
- 1 tog = 0.56782633 r-values (us).
- How do you convert togs to r-values (us)?
- Multiply the number of togs by 0.567826334111.
- What is 10 tog in ft²·°F·h/BTU?
- 10 tog = 5.6782633 ft²·°F·h/BTU.