Convert Feet per Minute to Decimeters per Second

Formula

dm/s = ft/min × 0.0508

or dm/s = ft/min ÷ 19.68503937008

Derivation from SI units:

• 1 ft/min = 0.3048 m ÷ 60 s = 0.00508 m/s
• 1 dm/s = 0.1 m ÷ 1 s
• 1 ft/min = 0.00508 m/s ÷ 0.1 m/s per dm/s = 0.0508 dm/s

Both units are defined exactly, so the factor is exact. Foot per Minute definition: foot per minute; Decimeter per Second definition: decimeter per second.

Worked examples

1. A reading of 90 ft/min converts to 4.572 dm/s.
   90 ft/min × 0.0508 = 4.572 dm/s
2. A value of 300 ft/min is 15.24 dm/s.
   300 ft/min × 0.0508 = 15.24 dm/s

Where it's used

Feet per Minute are used for fume hood face velocity (commonly 80–120 fpm), while decimeters per second appear in occasional instrument read-outs. Both measure face velocity and air permeability (volumetric flow per unit area), so the conversion is a fixed factor.

Foot per Minute to other face velocity & air permeability units

Frequently asked questions

Sources

• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot per minute (ft/min)".
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2 with SI prefix deci.

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.