Aspect Ratio

{
  "asOf": "2026-10-11T14:32:42.615Z",
  "commonRatios": [
    "1:1",
    "5:4",
    "…12 more"
  ],
  "cssAspectRatio": "16 / 9",
  "degraded": false,
  "derivedSide": null,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "height": 1080,
  "nearestCommonDifferencePercent": 0,
  "nearestCommonRatio": "16:9",
  "notChecked": [
    "pixel aspect ratio (non-square pixels), anamorphic formats and rotation metadata",
    "crop or letterbox decisions",
    "…1 more"
  ],
  "orientation": "landscape",
  "paddingTopPercent": 56.25,
  "ratioDecimal": 1.77777778,
  "reasons": [
    "Padding-top trick: 56.25% gives a box of this ratio; modern CSS: aspect-ratio: 16 / 9."
  ],
  "simplified": "16:9",
  "source": "Euclid's algorithm and common display and film ratios, computed locally",
  "summary": "1920 x 1080 is 16:9 (1.77778), the common ratio 16:9.",
  "verdict": "COMMON_RATIO",
  "width": 1920
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://css-design-calc.x402tookit.com/aspect-ratio?height=1080&width=1920'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://css-design-calc.x402tookit.com/aspect-ratio?height=1080&width=1920' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

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

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fcss-design-calc.x402tookit.com%2Faspect-ratio
const res = await pay("https://css-design-calc.x402tookit.com/aspect-ratio?height=1080&width=1920");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://css-design-calc.x402tookit.com/aspect-ratio?height=1080&width=1920")
    print(res.status_code, res.text)