Speed of Sound
Calculate the speed of sound in air, water, steel, or concrete at a given temperature.
⚡ 1 credit per call
Try it
Fill in the fields below and hit Send.
Why use this
LLMs approximate the speed of sound unreliably. Use this for accurate acoustic calculations, Mach number references, or physics simulations.
Input
| Field | Type | Required | Description |
|---|---|---|---|
temp_c |
number | ✓ | Temperature in Celsius (−100 to 1000) |
medium |
string | — | One of air, water, steel, concrete. Defaults to air |
Examples
- Air at 20°C → ~343 m/s (1235.5 km/h)
- Water at 20°C → ~1482 m/s (5335.2 km/h)
- Steel → 5100 m/s (constant)
- Concrete → 3400 m/s (constant)
Response
| Field | Type | Description |
|---|---|---|
medium |
string | The medium used |
temp_c |
number | Input temperature |
speed_ms |
number | Speed in metres per second |
speed_kmh |
number | Speed in kilometres per hour |
mach_1_ms |
number | Mach 1 reference speed (equals speed_ms) |
API Reference
Endpoint
POST https://api.lightningapi.tools/speed-of-soundRequired headers
Authorization: Bearer <apiKey>
Content-Type: application/json
Example request
{
"temp_c": 20,
"medium": "air"
}
Example response
{
"medium": "air",
"temp_c": 20,
"speed_ms": 343.2,
"speed_kmh": 1235.5,
"mach_1_ms": 343.2
}