kilometers per hour → feet per second

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

1 kilometers per hour = 0.911344415281 feet per second. To convert, multiply the number of kilometers per hour by 0.911344415281. The reverse direction is feet per second → kilometers per hour.

Common kilometers per hour to feet per second values

kilometers per hour	feet per second
1 kilometers per hour	0.911344415281 feet per second
2 kilometers per hour	1.82268883056 feet per second
5 kilometers per hour	4.55672207641 feet per second
10 kilometers per hour	9.11344415281 feet per second
25 kilometers per hour	22.783610382 feet per second
100 kilometers per hour	91.1344415281 feet per second
1000 kilometers per hour	911.344415281 feet per second

Input

Field	Type	Description
value *	string	Numeric value to convert

Example output

{
  "value": 1,
  "from": "kilometers-per-hour",
  "to": "feet-per-second",
  "result": 0.911344
}

Try it — see the 402 challenge (free)

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

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