4 units · base unit m²·K/W · M⁻¹ T³ Θ
R-value & insulance converter
US R-values and metric RSI values differ by a factor of 5.678, so an "R-30" batt is RSI 5.28. Quoting the wrong one overstates insulation almost sixfold.
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Ranges, ± tolerances, feet/inches and clock durations work in the value field.
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Show this value in all 4 r-value & insulance units
- RSI (m²·K/W)s m²·K/W 1
- R-value (US)s ft²·°F·h/BTU 5.678 263 341 11
- Clos clo 6.451 612 903 23
- Togs tog 10
Every row is RSI (m²·K/W) (m²·K/W) converted through the rsi, in exact rational arithmetic.
Common r-value & insulance conversions
- m²·K/W → ft²·°F·h/BTU
- m²·K/W → clo
- m²·K/W → tog
- ft²·°F·h/BTU → m²·K/W
- ft²·°F·h/BTU → clo
- ft²·°F·h/BTU → tog
- clo → m²·K/W
- clo → ft²·°F·h/BTU
- clo → tog
- tog → m²·K/W
- tog → ft²·°F·h/BTU
- tog → clo
All r-value & insulance units
Each unit expressed in rsi (m²·k/w)s (m²·K/W), the unit everything in this category converts through.
| Unit | Symbol | System | Value in m²·K/W |
|---|---|---|---|
| RSI (m²·K/W) | m²·K/W | SI | 1 |
| R-value (US) | ft²·°F·h/BTU | imperial | 0.176110183682 |
| Clo | clo | other | 0.155 |
| Tog | tog | other | 0.1 |
About r-value & insulance units
Convert R-value (US), RSI, clo and tog insulation ratings.
US R-values and metric RSI values differ by a factor of 5.678, so an "R-30" batt is RSI 5.28. Quoting the wrong one overstates insulation almost sixfold.
Dimensional formula: M⁻¹ T³ Θ. Every conversion on this page goes through the rsi (m²·k/w), using exact fractions rather than decimal approximations. Read how that works →