To Convert from to Multiply by Acceleration ft/s² m/s² 3.048 E-1 Area Density ft² m² 9.290 E-2 Ibm/ft³ kg/m³ 1.602 E + 1 slugs/ft³ kg/m³ 5.154 E + 2 Energy Btu J ft. lb J Force lb Length ft in. mile Mass Ibm slug Power ft. lb/s hp Pressure in. Hg (60 °F) 'ZEEE 3 1.055 E + 3 1.356 N 4.448 m 3.048 E-1 m 2.540 E-2 m 1.609 E + 3 kg 4.536 E 1 kg 1.459 E1 1.356 W 7.457 E + 2 N/m² 3.377 E + 3 lb/ft² (psf) N/m² 4.788 E + 1 lb/in.² (psi) N/m² 6.895 E + 3 Specific weight Temperature lb/ft³ N/m³ 1.571 E + 2 °F °C Te (5/9)(TE 32°) °R K 5.556 E - 1 Velocity ft/s m/s 3.048 E - 1 mi/hr (mph) m/s 4.470 E-1 Viscosity (dynamic) lb - s/ft² N⚫s/m² 4.788 E + 1 Viscosity (kinematic) ft²/s m²/s 9.290 E-2 Volume flowrate ft³/s m³/s 2.832 E - 2 gal/min (gpm) m³/s 6.309 E-5 "If more than four-place accuracy is desired, refer to Appendix E.