Speed

Just how fast is 1,000 metres per second?

Air & orbit

1,000 m/s

3,600 km/hkilometres per hour
2,236.9 mphmiles per hour
Mach 2.9155Mach
3.3356 × 10⁻⁶ cspeed of light
Equal time
DISTANCE IN ONE SECOND1 km in 1 s980 m in 1 s
01
1,000 metres per second3,600 km/hSpeed · definition
02
Lockheed SR-71 Blackbird3,528 km/hRepresentative cruise speed · specified · range 3,240 km/h–3,600 km/h
Each track shows distance covered in the same second. The small illustrations identify the movers; their sizes are schematic.

A little perspective

1,000 metres per second moves about 1.02 times as fast as Lockheed SR-71 Blackbird.

Measurements, assumptions & sources +

1,000 metres per second

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Lockheed SR-71 Blackbird

A rounded SR-71 reference: 32.7 m long, 16.9 m span, about 78 t maximum takeoff mass and roughly 980 m/s at high-speed cruise. Mission profile changes speed and mass.

NASA Armstrong — SR-71 Blackbird

The marked representative cruise speed is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

The visual compares speed with representative cruise speed. The records below preserve each value’s basis and caveats.

1,000 metres per second

3,600 km/h

Speed · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Lockheed SR-71 Blackbird

3,528 km/h

Representative cruise speed · specified · range 3,240 km/h–3,600 km/h

A rounded SR-71 reference: 32.7 m long, 16.9 m span, about 78 t maximum takeoff mass and roughly 980 m/s at high-speed cruise. Mission profile changes speed and mass.

Comparing
Speed ↔ Representative cruise speed
Relative size
1,000 metres per second is larger on this measurement by a factor of about 1.02. 1,000 metres per second's selected measurement is approximately 2.04% greater than Lockheed SR-71 Blackbird's.

How to read the visual

The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.

  • Lockheed SR-71 Blackbird uses a 3,528 km/h central value within a recorded range of 3,240 km/h–3,600 km/h.
  • The recorded ranges overlap, so the ordering can vary even though the central values differ.

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