Convert BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit
Instantly convert BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)) to BTU·inch per Hour-Square Foot-Fahrenheit (BTU·in/(hr·ft²·°F)) with our free online calculator.
Formula: BTU/(hr·ft·°F) to BTU·in/(hr·ft²·°F) — multiply by 12
Reference Table
| BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)) | BTU·inch per Hour-Square Foot-Fahrenheit (BTU·in/(hr·ft²·°F)) |
|---|---|
| 1 | 12 |
| 5 | 59.9998 |
| 10 | 120 |
| 25 | 299.999 |
| 50 | 599.998 |
| 100 | 1200 |
How to Convert BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit
Formula
To convert BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)) to BTU·inch per Hour-Square Foot-Fahrenheit (BTU·in/(hr·ft²·°F)): multiply by 12
Step-by-Step
- Start with your value in BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)).
- Multiply by 12 to perform the conversion.
- The result is your value expressed in BTU·inch per Hour-Square Foot-Fahrenheit (BTU·in/(hr·ft²·°F)).
Conversion Factor
1 BTU/(hr·ft·°F) = 12 BTU·in/(hr·ft²·°F)
Reverse Factor
1 BTU·in/(hr·ft²·°F) = 0.0833336 BTU/(hr·ft·°F)
Worked Example
Convert 25 BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit: 25 BTU/(hr·ft·°F) = 299.999 BTU·in/(hr·ft²·°F)
About BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F))
An imperial thermal-conductivity unit (≈ 1.7307 W/(m·K) per NIST SP 811) used in US HVAC engineering, building-envelope thermal design per ASHRAE 90.1, refrigeration system design, and petroleum-engineering reservoir heat-flow analysis (steam-flood and CSS thermal EOR per SPE technical literature). Reference values in US-edition engineering handbooks: copper 231 BTU/(hr·ft·°F), steel 26, concrete 0.8, wood 0.07, fiberglass batt insulation 0.025, expanded polystyrene 0.020, aerogel 0.009. US-edition heat-transfer textbooks (Holman, Incropera-DeWitt with US-customary tables) include thermal-conductivity property tables in BTU/(hr·ft·°F) alongside W/(m·K). The unit also appears in ASHRAE Standard 90.1 prescriptive R-value tables (where R-value = thickness / k), in petroleum-reservoir simulation property cards (CMG STARS), and in pre-2000 ASHRAE Handbook editions. Convert BTU/(hr·ft·°F) to W/(m·K) by multiplying by 1.7307; to BTU·in/(hr·ft²·°F) by multiplying by 12.
About BTU·inch per Hour-Square Foot-Fahrenheit (BTU·in/(hr·ft²·°F))
An imperial thermal-conductivity unit (≈ 0.1442 W/(m·K) per NIST SP 811 = exactly 1/12 of BTU/(hr·ft·°F)) used almost exclusively for US building-insulation materials. The peculiar 'inch in the numerator' construction lets the unit cancel directly into R-value per unit thickness: an insulation product with k = 0.25 BTU·in/(hr·ft²·°F) achieves R-4 per inch of installed thickness (an R-19 wall = 19/0.25 = ~5 inches of that product). BTU·in/(hr·ft²·°F) is the unit on fiberglass-batt packaging (Owens Corning, Johns Manville, Knauf), rigid-foam-board labels (Dow, Owens Corning Foamular XPS, Dow Thermax polyiso), spray-foam (BASF Walltite, Demilec, Lapolla) data sheets, mineral-wool batts (Rockwool), cellulose loose-fill, and all US Department of Energy ENERGY STAR insulation prescriptive R-value targets. Reference values: fiberglass batt 0.27 BTU·in/(hr·ft²·°F) = R-3.7/in; XPS rigid-foam 0.20 = R-5/in; closed-cell spray foam 0.16 = R-6.5/in; aerogel 0.10 = R-10/in.
Quick Facts
- 1 BTU per Hour-Foot-Fahrenheit equals 12 BTU·inch per Hour-Square Foot-Fahrenheit
- 1 BTU·inch per Hour-Square Foot-Fahrenheit equals 0.0833336 BTU per Hour-Foot-Fahrenheit
- BTU per Hour-Foot-Fahrenheit is a unit of thermal conductivity
- BTU·inch per Hour-Square Foot-Fahrenheit is a unit of thermal conductivity
- This conversion is commonly used in insulation design, heat exchanger engineering, and material science
- The BTU per Hour-Foot-Fahrenheit belongs to the imperial system
Common BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit Conversions
| BTU per Hour-Foot-Fahrenheit (BTU/(hr·ft·°F)) | BTU·inch per Hour-Square Foot-Fahrenheit (BTU·in/(hr·ft²·°F)) |
|---|---|
| 0.01 | 0.12 |
| 0.1 | 1.2 |
| 0.25 | 2.99999 |
| 0.5 | 5.99998 |
| 1 | 12 |
| 2 | 23.9999 |
| 3 | 35.9999 |
| 5 | 59.9998 |
| 10 | 120 |
| 15 | 179.999 |
| 20 | 239.999 |
| 25 | 299.999 |
| 50 | 599.998 |
| 75 | 899.997 |
| 100 | 1200 |
| 250 | 2999.99 |
| 500 | 5999.98 |
| 1000 | 12000 |
| 5000 | 59999.8 |
| 10000 | 120000 |
Understanding BTU per Hour-Foot-Fahrenheit
The BTU per Hour-Foot-Fahrenheit (symbol: BTU/(hr·ft·°F)) is a unit of thermal conductivity. An imperial thermal-conductivity unit (≈ 1.7307 W/(m·K) per NIST SP 811) used in US HVAC engineering, building-envelope thermal design per ASHRAE 90.1, refrigeration system design, and petroleum-engineering reservoir heat-flow analysis (steam-flood and CSS thermal EOR per SPE technical literature). Reference values in US-edition engineering handbooks: copper 231 BTU/(hr·ft·°F), steel 26, concrete 0.8, wood 0.07, fiberglass batt insulation 0.025, expanded polystyrene 0.020, aerogel 0.009. US-edition heat-transfer textbooks (Holman, Incropera-DeWitt with US-customary tables) include thermal-conductivity property tables in BTU/(hr·ft·°F) alongside W/(m·K). The unit also appears in ASHRAE Standard 90.1 prescriptive R-value tables (where R-value = thickness / k), in petroleum-reservoir simulation property cards (CMG STARS), and in pre-2000 ASHRAE Handbook editions. Convert BTU/(hr·ft·°F) to W/(m·K) by multiplying by 1.7307; to BTU·in/(hr·ft²·°F) by multiplying by 12.
It belongs to the imperial measurement system.
BTU per Hour-Foot-Fahrenheit are commonly used in insulation design, heat exchanger engineering, and material science.
Understanding BTU·inch per Hour-Square Foot-Fahrenheit
The BTU·inch per Hour-Square Foot-Fahrenheit (symbol: BTU·in/(hr·ft²·°F)) is a unit of thermal conductivity. An imperial thermal-conductivity unit (≈ 0.1442 W/(m·K) per NIST SP 811 = exactly 1/12 of BTU/(hr·ft·°F)) used almost exclusively for US building-insulation materials. The peculiar 'inch in the numerator' construction lets the unit cancel directly into R-value per unit thickness: an insulation product with k = 0.25 BTU·in/(hr·ft²·°F) achieves R-4 per inch of installed thickness (an R-19 wall = 19/0.25 = ~5 inches of that product). BTU·in/(hr·ft²·°F) is the unit on fiberglass-batt packaging (Owens Corning, Johns Manville, Knauf), rigid-foam-board labels (Dow, Owens Corning Foamular XPS, Dow Thermax polyiso), spray-foam (BASF Walltite, Demilec, Lapolla) data sheets, mineral-wool batts (Rockwool), cellulose loose-fill, and all US Department of Energy ENERGY STAR insulation prescriptive R-value targets. Reference values: fiberglass batt 0.27 BTU·in/(hr·ft²·°F) = R-3.7/in; XPS rigid-foam 0.20 = R-5/in; closed-cell spray foam 0.16 = R-6.5/in; aerogel 0.10 = R-10/in.
It belongs to the imperial measurement system.
BTU·inch per Hour-Square Foot-Fahrenheit are commonly used in insulation design, heat exchanger engineering, and material science.
Why Convert BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit?
Converting between BTU per Hour-Foot-Fahrenheit and BTU·inch per Hour-Square Foot-Fahrenheit is a frequent requirement for engineers, scientists, and students working with thermal conductivity values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate thermal conductivity conversion is essential.
Frequently Asked Questions
How do I convert BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit?
An imperial thermal-conductivity unit (≈ 1. To convert BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit, multiply by 12. For example, 25 BTU/(hr·ft·°F) equals 299.999 BTU·in/(hr·ft²·°F).
How many BTU·inch per Hour-Square Foot-Fahrenheit are in 1 BTU per Hour-Foot-Fahrenheit?
There are 12 BTU·inch per Hour-Square Foot-Fahrenheit in 1 BTU per Hour-Foot-Fahrenheit.
How many BTU per Hour-Foot-Fahrenheit are in 1 BTU·inch per Hour-Square Foot-Fahrenheit?
There are 0.0833336 BTU per Hour-Foot-Fahrenheit in 1 BTU·inch per Hour-Square Foot-Fahrenheit.
What is the formula for BTU per Hour-Foot-Fahrenheit to BTU·inch per Hour-Square Foot-Fahrenheit conversion?
The formula is: multiply by 12. This means 1 BTU/(hr·ft·°F) = 12 BTU·in/(hr·ft²·°F).
Is a BTU per Hour-Foot-Fahrenheit bigger than a BTU·inch per Hour-Square Foot-Fahrenheit?
No. One BTU per Hour-Foot-Fahrenheit is smaller than one BTU·inch per Hour-Square Foot-Fahrenheit because 1 BTU/(hr·ft·°F) equals 12 BTU·in/(hr·ft²·°F), which is greater than 1.
When do you need to convert between BTU per Hour-Foot-Fahrenheit and BTU·inch per Hour-Square Foot-Fahrenheit?
An imperial thermal-conductivity unit (≈ 0. BTU per Hour-Foot-Fahrenheit and BTU·inch per Hour-Square Foot-Fahrenheit are both thermal conductivity units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.