Just few hours ago I thought about possibility of having articles in English on this website; this is the first one, something of simple and easy to write down, but at least is something for startup. “OFS – US to SI Converter” is an Excel sheet that permits the conversions of units between US units system and SI system.

Here a list of what I’ve included:

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Acceleration

(accelerazione)

• in./sec² -> m/s² (2.54E-02)

• ft/sec² -> m/s² (3.048E-01)

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Area

(area)

• in.² -> m² (6.4516E-04)

• ft² -> m² (9.2903E-02)

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Area Moment of Inertia

(momento d’inerzia d’area)

• in.^4 -> m^4 (6.4516E-04)

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Density

(densità)

• lb (avoir.)/in.³ -> kg/m³ (2.7680E04)

• lb (avoir.)/ft³ (pcf) -> kg/m³ (1.6018E01)

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Energy

(energia)

• ft-lb -> J (1.3558)

• Btu -> J (1.0551E03)

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Force

(forza)

• lb -> N (4.4482)

• kip (1000 lb) -> N (4.4482E03)

• ton (2000 lb) -> N (8.8964E03)

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Length

(lunghezza)

• in. -> m (2.54E-02)

• ft -> m (3.048E-01)

• mi -> m (1.6093E03)

• nautical mi -> m (1.852E03)

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Mass

(massa)

• lb-sec²/ft (slug) -> kg (1.4594E01)

• lb (avoir.) -> kg (4.5359E-01)

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Mass Moment of Inertia

(momento d’inerzia di massa)

• lb-ft-sec² (slug-ft²) -> kg m² (1.3558)

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Moment

(momento)

• in.-lb -> N m (1.1298E-01)

• ft-lb -> N m (1.3558)

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Pressure

(pressione)

• lb/in.² (psi) -> Pa (6.8948E03)

• lb/ft² (psf) -> Pa (4.7880E01)

• tons/ft² (tsf) -> Pa (9.5760E04)

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Velocity

(velocità)

• ft/sec -> m/s (3.048E-01)

• mi/hr -> m/s (4.4704E-01)

• nautical mi/hr (knot) -> m/s (5.1444E-01)

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Volume

(volume)

• in³ -> m³ (1.6387E-05)

• ft³ -> m³ (2.8317E-02)

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You can download the .XLSX version from here:

http://www.box.net/shared/nzhutt3dz4

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and the .XLS version (97-2003) from here:

http://www.box.net/shared/h4igd9ryrc

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The file are protected against accidental modifies; you have only to insert values in coloured cells. If you want to unblock the cells then you have to use as password “Inter“, without quotes (yes, I’m a great Inter F.C. fan).

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For guidance, reports and more you can contact the author at:

ofs@hotmail.it

Eng. Onorio Francesco Salvatore