British Thermal Unit to Feet-Pound Converter
Energy · unit-converter
Convert British Thermal Unit to Feet-Pound with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: British Thermal Unit (btu)
To: Feet-Pound (ftlb)
About British Thermal Unit
The British thermal unit used here is the IT BTU: ≈ 1,055.056 J. It appears in HVAC, heating equipment, and US engineering data.
About Feet-Pound
The feet-pound is a mechanical work unit common in US torque and ballistics contexts.
How to convert british thermal units to feet-pounds
1 british thermal unit is equal to 778.1692622659649 feet-pound when both are expressed in joule-equivalents:
1 btu = (1,055.05585262 J ÷ 1.3558179483314003 J) ftlb = 778.1692622659649 ftlb
Each british thermal unit is defined as 1,055.05585262 J and each feet-pound as 1.3558179483314003 J in this tool, so one btu equals 1,055.05585262 ÷ 1.3558179483314003 ftlb = 778.1692622659649 ftlb.
Let d(btu) be the numeric amount in British Thermal Unit (btu), and d(ftlb) the amount in Feet-Pound (ftlb). Then:
d(ftlb) = d(btu) × (1,055.05585262 / 1.3558179483314003)
Equivalently, divide by how many btu fit into one ftlb (joules per ftlb divided by joules per btu):
d(ftlb) = d(btu) ÷ 0.00128506746346
Or: feet-pound = british thermal unit ÷ 0.00128506746346
Examples
Example #1: Convert 1 btu to feet-pound
1 btu = 1 btu × (1,055.05585262/1.3558179483314003) ftlb = 778.169262266 ftlb
1 btu = 1 btu ÷ 0.00128506746346 = 778.169262266 ftlb
Example #2: Convert 10 btu to feet-pound
10 btu = 10 btu × (1,055.05585262/1.3558179483314003) ftlb = 7781.69262266 ftlb
10 btu = 10 btu ÷ 0.00128506746346 = 7781.69262266 ftlb
Summary
To convert British Thermal Unit to Feet-Pound, multiply the value in btu by the ratio of joules per btu divided by joules per ftlb. Equivalently: value_ftlb = value_btu × (1055.05585262 / 1.3558179483314003). Numerically, 1 btu equals 778.1692622659649 ftlb.
Relationship context
Both units are US / imperial engineering units (BTU, therm, ft·lb). Conversions use fixed joule factors, so results stay consistent with the definitions in this converter. The factor from British Thermal Unit to Feet-Pound is 7.781693e+2 (1 btu = 778.1692622659649 ftlb).
Conversion tables
| British Thermal Unit (btu) | Feet-Pound (ftlb) |
|---|---|
| 0.1 | 77.8169262266 |
| 1 | 778.169262266 |
| 2 | 1,556.33852453 |
| 3 | 2,334.5077868 |
| 4 | 3,112.67704906 |
| 5 | 3,890.84631133 |
| 6 | 4,669.0155736 |
| 7 | 5,447.18483586 |
| 8 | 6,225.35409813 |
| 9 | 7,003.52336039 |
| British Thermal Unit (btu) | Feet-Pound (ftlb) |
|---|---|
| 10 | 7,781.69262266 |
| 20 | 15,563.3852453 |
| 30 | 23,345.077868 |
| 40 | 31,126.7704906 |
| 50 | 38,908.4631133 |
| 60 | 46,690.155736 |
| 70 | 54,471.8483586 |
| 80 | 62,253.5409813 |
| 90 | 70,035.2336039 |
| 100 | 77,816.9262266 |