Meter to Millisecond Delay Calculator
Convert distance (meters) to delay time (ms) for speaker alignment, DSP setup, and AV sync.
What does “meter to ms delay” mean?
In audio and acoustics, sound takes time to travel through a medium. If you know the distance in meters, you can calculate the time it takes for sound to reach a listener or microphone. That time is usually expressed in milliseconds (ms), because audio systems and digital processors use small timing values.
A delay calculator meter to ms helps you set exact delay values for PA systems, front fills, delay towers, studio monitors, and live video/audio synchronization.
Core conversion formula
The standard conversion is straightforward:
Delay (ms) = (Distance ÷ Speed of sound) × 1000
- Distance: how far sound travels (in meters)
- Speed of sound: typically around 343 m/s in air at 20°C
- 1000: converts seconds to milliseconds
Example: for 10 meters in air at 20°C, delay is (10 ÷ 343) × 1000 = 29.15 ms.
Quick reference table (air at 20°C)
| Distance (m) | Delay (ms) |
|---|---|
| 1 | 2.92 |
| 2 | 5.83 |
| 5 | 14.58 |
| 10 | 29.15 |
| 20 | 58.31 |
| 30 | 87.46 |
| 50 | 145.77 |
Why this matters in real setups
1) Live sound system alignment
When delay speakers are placed farther from the stage than main PA speakers, you need to delay the closer source so arrivals line up at the audience area. Without this, intelligibility drops and comb filtering increases.
2) Studio and control room timing
Time alignment between speakers and subwoofers often requires ms-level adjustments. Converting measured distances to ms gives a reliable starting point before tuning by ear or measurement software.
3) Broadcast and AV sync
In hybrid events, camera feeds, projectors, and loudspeakers can have different latency paths. Meter-to-ms conversion helps keep lip sync and audience timing coherent.
Temperature changes speed of sound
In air, speed of sound increases as temperature rises. A practical approximation is:
Speed (m/s) ≈ 331 + (0.6 × temperature in °C)
That means outdoor events can drift in timing from afternoon heat to cooler night conditions. If precision is important, update the speed value to match measured or expected conditions.
Practical workflow
- Measure actual distance between source and target point in meters.
- Select the closest speed preset (or enter a custom speed).
- Compute one-way delay in ms.
- Enter that value in your DSP, mixer, or speaker processor.
- Verify with measurement tools and fine-tune by ear if needed.
Frequently asked questions
Is 1 meter always 3 ms?
Not exactly. At 20°C, 1 meter is about 2.92 ms. “3 ms per meter” is a good field shortcut, but precise systems should use real calculations.
What is round-trip delay?
Round-trip delay is the time for sound to travel out and back (twice the distance). The calculator shows this too, which can be useful in measurement and echo-path estimations.
How do samples relate to ms?
Digital systems process audio in samples. The calculator converts delay time to samples using your sample rate, helping with plugin compensation and DSP environments that use sample-based delays.
Bottom line
A reliable delay calculator meter to ms is one of the fastest tools for cleaner, more intelligible sound. Use it as your starting point, then confirm with measurements in the real acoustic environment.