Convert Tog to Clo
1 tog = 0.6451612903 clo. 1 clo = 1.55 tog. Example: 13.5 tog = 13.5 × 0.6451612903 = 8.709677419 clo.
Also searched as tog to clo, tog in clo, tog into clo, tog to clo converter and how many clo in a tog.
1 tog = 0.6451612903 clo
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk tog to clo converter to paste a column from Excel.
How to Convert Tog to Clo
- 1 tog = 0.6451612903 clo
- 1 clo = 1.55 tog
- Example: convert 13.5 tog to clo: 13.5 tog = 13.5 × 0.6451612903 clo = 8.709677419 clo
Formula
clo = tog × 0.6451612903226
or clo = tog ÷ 1.55
Derivation from SI units:
- 1 tog = 0.1 m²·K/W.
- 1 clo = 0.155 m²·K/W (ISO 7730, ASHRAE 55).
- 1 tog = 0.1 m²·K/W ÷ 0.155 m²·K/W per clo = 0.6451612903226 clo
Both units are defined exactly, so the factor is exact. Tog definition: tog; Clo definition: clo.
Worked examples
- A winter duvet of 13.5 tog is 8.709677419 clo.
13.5 tog × 0.6451612903 = 8.709677419 clo - A summer duvet of 4.5 tog is 2.903225806 clo.
4.5 tog × 0.6451612903 = 2.903225806 clo
Tog to Clo conversion table
| Tog | Clo |
|---|---|
| 0.5 tog | 0.3225806452 clo |
| 1 tog | 0.6451612903 clo |
| 2.5 tog | 1.612903226 clo |
| 4.5 tog | 2.903225806 clo |
| 7.5 tog | 4.838709677 clo |
| 9 tog | 5.806451613 clo |
| 10.5 tog | 6.774193548 clo |
| 12 tog | 7.741935484 clo |
| 13.5 tog | 8.709677419 clo |
| 15 tog | 9.677419355 clo |
Where it's used
Duvet and sleeping-bag ratings in tog are converted to clo for comfort calculations. Divide by 1.55.
Tog to other thermal resistance (r-value) units
| Conversion | 1 tog equals |
|---|---|
| tog to clo | 0.6451612903 clo |
| tog to RSI | 0.1 m²·K/W |
| tog to R (US) | 0.5678263341 ft²·°F·h/BTU |
| tog to square metre hour degree Celsius per kilocalorie | 0.1163 m²·h·°C/kcal |
Frequently asked questions
What is 13.5 tog in clo?
8.709677419 clo.
How many clo are in 1 tog?
1 tog = 0.6451612903 clo.
How do I convert tog to clo?
Multiply the value in tog by 0.6451612903, or divide it by 1.55. For example, 13.5 tog × 0.6451612903 = 8.709677419 clo.
Is the tog to clo conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
- 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".
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 Tog to Clo. Retrieved October 29, 2026, from https://scientificconverters.com/thermal-resistance/tog-to-clo/
IEEE
Scientific Converters, "Convert Tog to Clo," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/thermal-resistance/tog-to-clo/