Convert Torr to Pounds per Square Foot
Convert Torr (Torr) to Pounds per Square Foot (lbf/ft²) instantly and accurately.
Conversion Formula
lbf/ft² = Torr × 2.784495557
About Torr
The torr is defined as exactly 1/760 of a standard atmosphere ≈ 133.322 Pa - effectively replacing mmHg with an exact definition. Named after Evangelista Torricelli (1608-1647), inventor of the barometer. Vacuum science universally uses torr: rough vacuum 760-1 torr; medium vacuum 1-10⁻³ torr; high vacuum 10⁻³-10⁻⁷ torr; ultra-high vacuum below 10⁻⁹ torr. UHV systems for surface science, particle accelerator beam tubes, and space simulation chambers reach 10⁻¹¹-10⁻¹² torr. 1 torr = 133.322 Pa.
About Pounds per Square Foot
One pound per square foot (psf) ≈ 47.88 Pa - the standard structural engineering load unit in US practice. Building codes specify design loads in psf: residential floors 40 psf; office buildings 50-80 psf; assembly areas 100+ psf; snow loads can exceed 100 psf. Wind pressure on building facades, soil bearing capacity for shallow foundations, and lateral earth pressure in retaining walls are all in psf. The related unit ksf (1,000 psf = 47.88 kPa) covers higher-capacity soils and deep foundations. 1 psf = 47.88 Pa.
Quick Reference Table
| Torr (Torr) | Pounds per Square Foot (lbf/ft²) |
|---|---|
| 1 Torr | 2.7845 lbf/ft² |
| 2 Torr | 5.56899 lbf/ft² |
| 5 Torr | 13.9225 lbf/ft² |
| 10 Torr | 27.845 lbf/ft² |
| 25 Torr | 69.6124 lbf/ft² |
| 50 Torr | 139.225 lbf/ft² |
| 100 Torr | 278.45 lbf/ft² |