kilometers per hour → meters per second

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

1 kilometers per hour = 0.277777777778 meters per second. To convert, multiply the number of kilometers per hour by 0.277777777778. The reverse direction is meters per second → kilometers per hour.

Common kilometers per hour to meters per second values

kilometers per hour	meters per second
1 kilometers per hour	0.277777777778 meters per second
2 kilometers per hour	0.555555555556 meters per second
5 kilometers per hour	1.38888888889 meters per second
10 kilometers per hour	2.77777777778 meters per second
25 kilometers per hour	6.94444444444 meters per second
100 kilometers per hour	27.7777777778 meters per second
1000 kilometers per hour	277.777777778 meters per second

Input

Field	Type	Description
value *	string	Numeric value to convert

Example output

{
  "value": 1,
  "from": "kilometers-per-hour",
  "to": "meters-per-second",
  "result": 0.277778
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/convert/kilometers-per-hour-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/kilometers-per-hour-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-kilometers-per-hour-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/kilometers-per-hour-to-meters-per-second", { method: "GET", headers: { "X-Pow-Solution": c.token + ":" + n } });

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