Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Two-Way Travel (s)

Time between transmit and echo arrival.

Sound Speed (m/s)

Speed of sound in the medium; fresh water is near 1480 m/s.

Convert a measured two-way echo travel time into distance as rangeMeters = soundSpeedMsPerS * twoWayTravelSeconds / 2, defaulting to 1480 m/s in water. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Range (m)

One-way range to the reflector.

• Sonar range and transmission loss depend on frequency, source level, beam pattern, water properties, spreading model, absorption, target strength, reverberation, ambient noise, bandwidth, detection threshold, and propagation paths.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• OTDR Distance

  Convert optical time-domain reflectometer round-trip delay to one-way fiber distance using its group refractive index.

• Ultrasonic Distance From Time

  Calculate ultrasonic pulse-echo target distance from round-trip travel time and assumed sound speed; sound speed must reflect the measurement medium.

• Lidar Range Estimate

  Estimate lidar return range with a simplified link model rangeMeters = linkConstantM * sqrt(peakPowerWatts * reflectivityFraction), where linkConstantM folds geometry, aperture, and detector terms into one calibrated constant (default 1000).