feet per second → kilometers per hour

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

1 feet per second = 1.09728 kilometers per hour. To convert, multiply the number of feet per second by 1.09728. The reverse direction is kilometers per hour → feet per second.

Common feet per second to kilometers per hour values

feet per second	kilometers per hour
1 feet per second	1.09728 kilometers per hour
2 feet per second	2.19456 kilometers per hour
5 feet per second	5.4864 kilometers per hour
10 feet per second	10.9728 kilometers per hour
25 feet per second	27.432 kilometers per hour
100 feet per second	109.728 kilometers per hour
1000 feet per second	1097.28 kilometers per hour

Input

Field	Type	Description
value *	string	Numeric value to convert

Example output

{
  "value": 1,
  "from": "feet-per-second",
  "to": "kilometers-per-hour",
  "result": 1.09728
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/convert/feet-per-second-to-kilometers-per-hour?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/feet-per-second-to-kilometers-per-hour?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-feet-per-second-to-kilometers-per-hour")).json();
let n = 0;
while (lz(createHash("sha256").update(c.challenge + ":" + n).digest()) < c.difficulty) n++;
await fetch("https://agent402.tools/api/convert/feet-per-second-to-kilometers-per-hour", { method: "GET", headers: { "X-Pow-Solution": c.token + ":" + n } });

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