Convert clos to r-value (us)s
1 clo = 0.880130817873 ft²·°F·h/BTU — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
How to convert clos to r-value (us)s
Multiply the number of clos by 0.880130817873 to get r-value (us)s.
Clo: Clothing insulation. One clo keeps a resting person comfortable at 21 °C.
R-value (US): The number on US insulation batts. R-13 is RSI 2.29 — divide by 5.678 to go metric.
Clo to R-value (US) conversion table
| Clos (clo) | R-value (US)s (ft²·°F·h/BTU) |
|---|---|
| 1 clo | 0.880 130 82 |
| 2 clo | 1.760 261 6 |
| 3 clo | 2.640 392 5 |
| 5 clo | 4.400 654 1 |
| 10 clo | 8.801 308 2 |
| 20 clo | 17.602 616 |
| 25 clo | 22.003 27 |
| 50 clo | 44.006 541 |
| 100 clo | 88.013 082 |
| 250 clo | 220.0327 |
| 500 clo | 440.065 41 |
| 1000 clo | 880.130 82 |
R-value (US) to Clo conversion table
| R-value (US)s (ft²·°F·h/BTU) | Clos (clo) |
|---|---|
| 1 ft²·°F·h/BTU | 1.136 194 7 |
| 2 ft²·°F·h/BTU | 2.272 389 5 |
| 3 ft²·°F·h/BTU | 3.408 584 2 |
| 5 ft²·°F·h/BTU | 5.680 973 7 |
| 10 ft²·°F·h/BTU | 11.361 947 |
| 20 ft²·°F·h/BTU | 22.723 895 |
| 25 ft²·°F·h/BTU | 28.404 868 |
| 50 ft²·°F·h/BTU | 56.809 737 |
| 100 ft²·°F·h/BTU | 113.619 47 |
| 250 ft²·°F·h/BTU | 284.048 68 |
| 500 ft²·°F·h/BTU | 568.097 37 |
| 1000 ft²·°F·h/BTU | 1136.1947 |
Frequently asked
How many r-value (us)s are in a clo?
One clo equals 0.8801308179 r-value (us)s (clo → ft²·°F·h/BTU). That figure is exact, not rounded.
How do you convert clos to r-value (us)s?
Multiply the number of clos by 0.880130817873 to get r-value (us)s.
What is 1 ft²·°F·h/BTU in clos?
One r-value (us) is 1.136194733 clos.
What is 10 clo in ft²·°F·h/BTU?
10 clo = 8.801 308 2 ft²·°F·h/BTU.
What exactly is a clo?
Clothing insulation. One clo keeps a resting person comfortable at 21 °C.
What exactly is a r-value (us)?
The number on US insulation batts. R-13 is RSI 2.29 — divide by 5.678 to go metric.