mach → meters per second

Convert mach to meters per second (speed). Pass ?value=N.

1 mach = 343 meters per second. To convert, multiply the number of mach by 343. The reverse direction is meters per second → mach.

Common mach to meters per second values

mach	meters per second
1 mach	343 meters per second
2 mach	686 meters per second
5 mach	1715 meters per second
10 mach	3430 meters per second
25 mach	8575 meters per second
100 mach	34300 meters per second
1000 mach	343000 meters per second

Input

Field	Type	Description
value *	string	Numeric value to convert

Example output

{
  "value": 1,
  "from": "mach",
  "to": "meters-per-second",
  "result": 343
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/convert/mach-to-meters-per-second?value=1"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/convert/mach-to-meters-per-second?value=1");

No wallet? Pay with compute

This is a pure-CPU tool, so an agent without a wallet can pay with proof-of-work instead of USDC: fetch a challenge, solve it (16 leading zero bits), and resend with the X-Pow-Solution header.

import { createHash } from "node:crypto";
const lz = (b) => { let t = 0; for (const x of b) { if (!x) { t += 8; continue; } t += Math.clz32(x) - 24; break; } return t; };
const c = await (await fetch("https://agent402.tools/api/pow/challenge?slug=convert-mach-to-meters-per-second")).json();
let n = 0;
while (lz(createHash("sha256").update(c.challenge + ":" + n).digest()) < c.difficulty) n++;
await fetch("https://agent402.tools/api/convert/mach-to-meters-per-second", { method: "GET", headers: { "X-Pow-Solution": c.token + ":" + n } });

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