Convert Pounds per foot-second to Pounds per foot-hour
Instantly convert Pounds per foot-second (lb/(ft·s)) to Pounds per foot-hour (lb/(ft·hr)) with our free online calculator.
Formula: lb/(ft·s) to lb/(ft·hr) — multiply by 3599.99
Reference Table
| Pounds per foot-second (lb/(ft·s)) | Pounds per foot-hour (lb/(ft·hr)) |
|---|---|
| 1 | 3599.99 |
| 5 | 17999.9 |
| 10 | 35999.9 |
| 25 | 89999.7 |
| 50 | 179999 |
| 100 | 359999 |
How to Convert Pounds per foot-second to Pounds per foot-hour
Formula
To convert Pounds per foot-second (lb/(ft·s)) to Pounds per foot-hour (lb/(ft·hr)): multiply by 3599.99
Step-by-Step
- Start with your value in Pounds per foot-second (lb/(ft·s)).
- Multiply by 3599.99 to perform the conversion.
- The result is your value expressed in Pounds per foot-hour (lb/(ft·hr)).
Conversion Factor
1 lb/(ft·s) = 3599.99 lb/(ft·hr)
Reverse Factor
1 lb/(ft·hr) = 0.000277779 lb/(ft·s)
Worked Example
Convert 25 Pounds per foot-second to Pounds per foot-hour: 25 lb/(ft·s) = 89999.7 lb/(ft·hr)
About Pound per foot-second (lb/(ft·s))
An imperial dynamic-viscosity unit using pound-mass per foot-second (≈ 1.4882 Pa·s per NIST SP 811 = 1,488 cP). Primarily encountered in US petroleum engineering (older API and SPE journal articles quote downhole-fluid viscosities in lb/(ft·s) alongside cP for drilling-fluid rheology and well-cementing calcs per API RP 13B), legacy ASME fluid-mechanics and heat-transfer textbooks (older editions of Streeter, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot, Incropera-DeWitt), and HVAC calculations performed in fully-imperial unit systems where consistency with lb / ft / s eliminates conversion factors in Reynolds-number and Prandtl-number dimensionless-group formulas. Most modern US engineering has migrated to centipoise / Pa·s for new work; lb/(ft·s) is most useful for interpreting pre-1990s US-edition specifications, journal articles, and ASME-code background calculation derivations. Convert lb/(ft·s) to Pa·s by multiplying by 1.4882; to cP / mPa·s by multiplying by 1,488.2; to lb/(ft·hr) by multiplying by 3,600.
About Pound per foot-hour (lb/(ft·hr))
An imperial dynamic-viscosity unit using pound-mass per foot-hour (≈ 4.1338 × 10⁻⁴ Pa·s = 0.4134 cP per NIST SP 811 = exactly 1/3,600 of lb/(ft·s)). Used in US process-engineering and HVAC contexts where the natural process timescale is hours rather than seconds — making the time-base of the viscosity unit match the time-base of the mass-flow or heat-flow calculation it appears in, eliminating intermediate unit conversions. Common in heat-transfer-coefficient correlations for gas-phase viscosity at industrial operating conditions (gas viscosity is ~10⁻⁵ Pa·s, which in lb/(ft·hr) becomes ~0.02 — a much more legible number than the SI version). Also appears in older US chemical-engineering handbooks (Perry's pre-2008 editions, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot first edition), refining-process design references where the entire material/energy balance is in lb-h-ft-Btu units, and gas-pipeline transmission design per AGA Report No. 8 and 10 supercompressibility tables. Convert lb/(ft·hr) to Pa·s by multiplying by 4.1338 × 10⁻⁴; to cP by multiplying by 0.4134.
Quick Facts
- 1 Pound per foot-second equals 3599.99 Pounds per foot-hour
- 1 Pound per foot-hour equals 0.000277779 Pounds per foot-second
- Pound per foot-second is a unit of dynamic viscosity
- Pound per foot-hour is a unit of dynamic viscosity
- This conversion is commonly used in lubricant selection, chemical processing, and fluid dynamics
- The Pound per foot-second belongs to the imperial system
Common Pound per foot-second to Pound per foot-hour Conversions
| Pounds per foot-second (lb/(ft·s)) | Pounds per foot-hour (lb/(ft·hr)) |
|---|---|
| 0.01 | 35.9999 |
| 0.1 | 359.999 |
| 0.25 | 899.997 |
| 0.5 | 1799.99 |
| 1 | 3599.99 |
| 2 | 7199.98 |
| 3 | 10800 |
| 5 | 17999.9 |
| 10 | 35999.9 |
| 15 | 53999.8 |
| 20 | 71999.8 |
| 25 | 89999.7 |
| 50 | 179999 |
| 75 | 269999 |
| 100 | 359999 |
| 250 | 899997 |
| 500 | 1799990 |
| 1000 | 3599990 |
| 5000 | 17999900 |
| 10000 | 35999900 |
Understanding Pounds per foot-second
The Pound per foot-second (symbol: lb/(ft·s)) is a unit of dynamic viscosity. An imperial dynamic-viscosity unit using pound-mass per foot-second (≈ 1.4882 Pa·s per NIST SP 811 = 1,488 cP). Primarily encountered in US petroleum engineering (older API and SPE journal articles quote downhole-fluid viscosities in lb/(ft·s) alongside cP for drilling-fluid rheology and well-cementing calcs per API RP 13B), legacy ASME fluid-mechanics and heat-transfer textbooks (older editions of Streeter, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot, Incropera-DeWitt), and HVAC calculations performed in fully-imperial unit systems where consistency with lb / ft / s eliminates conversion factors in Reynolds-number and Prandtl-number dimensionless-group formulas. Most modern US engineering has migrated to centipoise / Pa·s for new work; lb/(ft·s) is most useful for interpreting pre-1990s US-edition specifications, journal articles, and ASME-code background calculation derivations. Convert lb/(ft·s) to Pa·s by multiplying by 1.4882; to cP / mPa·s by multiplying by 1,488.2; to lb/(ft·hr) by multiplying by 3,600.
It belongs to the imperial measurement system.
Pounds per foot-second are commonly used in lubricant selection, chemical processing, and fluid dynamics.
Understanding Pounds per foot-hour
The Pound per foot-hour (symbol: lb/(ft·hr)) is a unit of dynamic viscosity. An imperial dynamic-viscosity unit using pound-mass per foot-hour (≈ 4.1338 × 10⁻⁴ Pa·s = 0.4134 cP per NIST SP 811 = exactly 1/3,600 of lb/(ft·s)). Used in US process-engineering and HVAC contexts where the natural process timescale is hours rather than seconds — making the time-base of the viscosity unit match the time-base of the mass-flow or heat-flow calculation it appears in, eliminating intermediate unit conversions. Common in heat-transfer-coefficient correlations for gas-phase viscosity at industrial operating conditions (gas viscosity is ~10⁻⁵ Pa·s, which in lb/(ft·hr) becomes ~0.02 — a much more legible number than the SI version). Also appears in older US chemical-engineering handbooks (Perry's pre-2008 editions, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot first edition), refining-process design references where the entire material/energy balance is in lb-h-ft-Btu units, and gas-pipeline transmission design per AGA Report No. 8 and 10 supercompressibility tables. Convert lb/(ft·hr) to Pa·s by multiplying by 4.1338 × 10⁻⁴; to cP by multiplying by 0.4134.
It belongs to the imperial measurement system.
Pounds per foot-hour are commonly used in lubricant selection, chemical processing, and fluid dynamics.
Why Convert Pounds per foot-second to Pounds per foot-hour?
Converting between Pounds per foot-second and Pounds per foot-hour is a frequent requirement for engineers, scientists, and students working with dynamic viscosity 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 dynamic viscosity conversion is essential.
Frequently Asked Questions
How do I convert Pounds per foot-second to Pounds per foot-hour?
An imperial dynamic-viscosity unit using pound-mass per foot-second (≈ 1. To convert Pounds per foot-second to Pounds per foot-hour, multiply by 3599.99. For example, 25 lb/(ft·s) equals 89999.7 lb/(ft·hr).
How many Pounds per foot-hour are in 1 Pound per foot-second?
There are 3599.99 Pounds per foot-hour in 1 Pound per foot-second.
How many Pounds per foot-second are in 1 Pound per foot-hour?
There are 0.000277779 Pounds per foot-second in 1 Pound per foot-hour.
What is the formula for Pound per foot-second to Pound per foot-hour conversion?
The formula is: multiply by 3599.99. This means 1 lb/(ft·s) = 3599.99 lb/(ft·hr).
Is a Pound per foot-second bigger than a Pound per foot-hour?
No. One Pound per foot-second is smaller than one Pound per foot-hour because 1 lb/(ft·s) equals 3599.99 lb/(ft·hr), which is greater than 1.
When do you need to convert between Pounds per foot-second and Pounds per foot-hour?
An imperial dynamic-viscosity unit using pound-mass per foot-hour (≈ 4. Pound per foot-second and Pound per foot-hour are both dynamic viscosity 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.