FPM to m/s Converter
1 foot per minute = 0.00508 meters per second, derived from 1 ft = 0.3048 m (1959 international yard agreement) and 1 minute = 60 s, so 1 fpm = 0.3048 / 60 = 0.00508 m/s. The...
Formula
Source: Engineering Toolbox, ASHRAE Handbook | Last reviewed: June 7, 2026
Examples
100 fpm
= 0.508 m/s
100 FPM = 0.508 m/s
500 fpm
= 2.54 m/s
500 FPM = 2.54 m/s
Where is this used?
Cleanroom design in the semiconductor, pharmaceutical, and biotechnology industries requires air face velocity in HEPA filter banks of 90 ± 20 fpm per Federal Standard 209E and IEST-RP-CC003, equivalent to 0.46 ± 0.10 m/s per ISO 14644-1 — the same physical airflow, but the unit system differs between the US semiconductor industry and the international pharmaceutical industry, requiring conversion at the documentation and validation boundary.
Ductwork sizing in commercial HVAC uses velocity-based design (equal friction method, static regain method) with US practice in fpm (per ASHRAE Handbook of Fundamentals and SMACNA HVAC Duct Construction Standards) and European practice in m/s (per DW143, EN 12237, and VDI 3802) — a 12-inch supply duct carrying 1,200 fpm transports the same air as a 300 mm duct carrying 6.10 m/s, and engineering teams working on international projects must convert fluently.
Laboratory fume hood certification per ASHRAE 110 (US) uses face velocity in fpm, while EN 14175 (Europe) uses m/s — the actual measurement of 100 fpm = 0.508 m/s, and the same hood must be certified in both units when the equipment crosses the Atlantic.
Industrial dust collection systems per ACGIH Industrial Ventilation Manual (US) specify duct transport velocities in fpm (4,500 fpm for sawdust, 5,000 fpm for plastic pellets, 3,500 fpm for grain dust) while the European equivalent VDI 2262 and ATEX guidelines use m/s — the conversion 1 fpm = 0.00508 m/s appears in every duct sizing calculation.
Wind engineering for building design uses the Eurocode EN 1991-1-4 reference wind velocity in m/s and ASCE 7 (US) in mph (with fpm rarely used in structural wind engineering), but for facade pressure and cladding design the local wind tunnel data may be in fpm and requires conversion.
Escalator and moving walkway design per EN 115 specifies nominal speed in m/s (typically 0.5 or 0.65 m/s for indoor, 0.75 m/s for outdoor) while US ASME A17.1 specifies in fpm (100, 120, or 150 fpm) — the conversion is required when certifying European-manufactured equipment for US installation or vice versa.
Mine ventilation air velocity measurement per MSHA (US) uses fpm (a 1,000 fpm main airway is high but acceptable for a primary intake) while international mine ventilation practice (Australia, South Africa, Canada) uses m/s — face velocity in working faces per diesel equipment exposure limits is typically 0.5–1.0 m/s (about 100–200 fpm), with the conversion appearing in equipment specification and air quantity requirement calculations.
Pneumatic conveying system air velocity for dilute-phase and dense-phase conveying of bulk solids (cement, fly ash, plastic pellets, grain) is specified in fpm (US) or m/s (Europe) with minimum 'pickup velocity' requirements varying by material — the conversion is required when designing or troubleshooting international pneumatic conveying systems.
Frequently Asked Questions
What is typical duct velocity in m/s?
Residential ductwork: 2–4 m/s (400–800 FPM). Commercial duct mains: 5–10 m/s (1000–2000 FPM). High-velocity systems: 10–20 m/s (2000–4000 FPM).
How do I convert m/s back to FPM?
Divide m/s by 0.00508. For quick estimates, multiply m/s by 196.85 to get FPM.
What is the recommended fume hood face velocity?
Typical fume hood face velocity is 100 FPM (0.508 m/s) per ANSI/ASHRAE 110 standards. Low-flow hoods operate at 60–80 FPM.
Reviewed for accuracy
· Last reviewed: June 7, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.