Foot/s to Meter/s Converter

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How Foot/s Relates to Meter/s

foot/s to meter/s metric conversion table

How to Convert FT/S to M/S (Foot/s to Meter/s)?

We can convert foot/s to meter/s by using an example.

How to Convert ft/s to m/s (Step-by-Step)

Converting feet per second to meters per second is essential when translating US engineering specifications to international SI standards. The exact conversion factor is 0.3048.

1. Write down the speed value in feet per second (ft/s).
2. Multiply by 0.3048 (this is exact — 1 foot = 0.3048 meters by definition).
3. The result is the equivalent speed in meters per second (m/s).
4. This conversion is exact, not an approximation.

Common ft/s to m/s Conversions

Reference table for engineering and physics conversions from US customary to SI speed units.

Solved Examples: ft/s to m/s

Practice Questions

Try solving these on your own to test your understanding:

1. Convert 60 ft/s to m/s. (Answer: 18.29 m/s)
2. An arrow flies at 300 ft/s. What is this in m/s? (Answer: 91.44 m/s)
3. Convert 3,200 ft/s (high-powered rifle) to m/s. (Answer: 975.4 m/s)
4. A golf ball launch speed is 250 ft/s. Convert to m/s. (Answer: 76.2 m/s)
5. Air velocity in a wind tunnel is 400 ft/s. What is this in m/s? (Answer: 121.92 m/s)

US to SI Engineering Conversion Context

International engineering projects often originate with US specifications in imperial units but must be executed using SI standards. Pipe flow velocity limits in ASME codes use ft/s (typically 3-10 ft/s for water, 40-60 ft/s for gas), while ISO standards use m/s. HVAC airflow velocity is specified in ft/min (fpm) in ASHRAE standards but m/s in ISO 16890. The conversion between ft/s and m/s is the foundation — once you have m/s, multiplying by 60 gives m/min, or by 3.6 gives km/h. The 0.3048 factor is exact and introduces zero rounding error.

Speed of Sound in Different Media

The speed of sound varies dramatically by medium and is reported in ft/s in US textbooks and m/s internationally. In air at 20°C: 1,125 ft/s (343 m/s). In water: 4,856 ft/s (1,480 m/s) — about 4.3× faster. In steel: 16,900 ft/s (5,150 m/s) — about 15× faster than in air. In concrete: 12,000 ft/s (3,658 m/s). In aluminum: 21,000 ft/s (6,400 m/s). These values matter in non-destructive testing (NDT), sonar, and acoustics — fields that frequently bridge US and international specifications.

The Definition: Why 0.3048 Is Exact

In 1959, the US, UK, Canada, Australia, New Zealand, and South Africa agreed to define the international yard as exactly 0.9144 meters. This makes 1 foot = 0.9144/3 = 0.3048 meters exactly. Before 1959, the US used a slightly different "survey foot" (1200/3937 meters = 0.30480061 m), but this was officially deprecated in 2023. Today, the factor 0.3048 is used universally and introduces zero conversion error — it is a defined constant, not a measured approximation.

Key Takeaways

• Multiply ft/s by exactly 0.3048 to get m/s.
• The factor 0.3048 is exact (1 foot = 0.3048 meters by definition since 1959).
• Speed of sound: 1,125 ft/s = 343 m/s — a useful verification pair.
• HVAC and pipe flow specs are the most common use case for this conversion.
• Quick check: 100 ft/s ≈ 30.5 m/s ≈ 68 mph.
• No rounding error is ever introduced — the conversion is mathematically exact.

Foot/s to Meter/s Conversion Formula

Frequently Asked Questions