SpeedFeet per Second to Miles per Hour

Feet per Second to Miles per Hour

Snapshot

1 Foot per Second equals 0.681818 Miles per Hour. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses fixed meters-per-second-based speed definitions.
Example: For 0.5 Feet per Second, the result equals 0.340909 Miles per Hour.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

0.681818 Miles per Hour (mph)

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Machine access

Available to apps and AI agents

Feet per Second to Miles per Hour can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The identifiers below select the same calculation as the calculator.

Machine-readable identifiers

Conversion family: speed
Source unit: foot_per_second
Target unit: mile_per_hour

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "speed",
  "value": 1,
  "from": "foot_per_second",
  "to": "mile_per_hour"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "speed",
    "value": 1,
    "from": "foot_per_second",
    "to": "mile_per_hour",
    "result": {
      "raw": 0.6818181818181819,
      "display": "0.681818"
    },
    "canonicalPath": "/speed/feet-per-second-to-miles-per-hour/"
  }
}

Full API documentation

Explanation

Use this page when you want a direct feet per second to miles per hour conversion. Here, 1 foot per second equals 0.681818 miles per hour.

Both units use fixed imperial distance and time definitions, so the conversion moves through meters per second and preserves one deterministic factor. This route is useful when translating imperial speed values between miles per hour and feet per second for transport, motion analysis, and technical calculations.

This conversion is purely multiplicative because both units reduce through meters per second using fixed distance and time definitions with no offset.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Foot per Second = 0.681818 Miles per Hour (using fixed meters-per-second-based speed definitions).
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Feet per Second (ft/s)	Miles per Hour (mph)
0.5	0.340909
1	0.681818
2	1.363636
5	3.409091
10	6.818182
20	13.636364
30	20.454545
60	40.909091
100	68.181818
120	81.818182

Questions & answers

Frequently Asked Questions

What is 1 foot per second in miles per hour?

1 Foot per Second equals 0.681818 Miles per Hour on this page.

What conversion factor does this Feet per Second to Miles per Hour page use?

This route uses one fixed speed factor derived from exact distance and time definitions, so the direct answer, calculator, and common values table stay aligned.

Can I use decimal values for feet per second?

Yes. Decimal inputs use the same fixed factor, and the mirror Miles per Hour to Feet per Second page keeps the reverse direction aligned.