ForHosting KIT · Developer Utilities

Baseboard heater sizing calculator

Choosing an electric baseboard heater by guesswork either freezes a room on the coldest night or overspends on redundant linear feet of strip heat.

● BetaFree · in your browser

Run — free How it works & API

Use it from WebAPIEmailTelegramApp soon

This baseboard heater sizing calculator turns two plain inputs—interior floor area in square feet and a local climate band—into a deterministic total wattage and the linear feet of standard electric baseboard needed to deliver it. Mild winters use about eight watts per square foot, moderate climates ten, cold twelve, and very cold fifteen; length follows by dividing total watts by the heater’s watts per foot (two hundred fifty by default for typical two-hundred-forty-volt residential units). Use the free browser tool when shopping retail lengths and nameplate wattages, then call the same pure function from scripts when you generate contractor quotes, product filters, or renovation checklists. Results always match for the same inputs: no network, no randomness, and no model drift between the widget and the paid API path.

How to use it

Enter your values in the form above. The tool checks them before calculating and shows the result on the same page.

Check your inputs

Use the labels and units shown next to each field. If something is missing or outside the allowed range, the page points to the field to fix.

Use it again or automate it

Use the browser tool for individual checks and the API when you need the same capability in an automated workflow.

What you can do with it

Get an answer now

Enter one set of values and see the result without building a spreadsheet or script.

Compare scenarios

Change one value at a time and rerun the calculation to understand what affects the result.

Automate repeated work

Use the API when the same calculation needs to run inside your product or workflow.

FAQ

How do I use this capability?

Complete the fields above and run it on this page. The form highlights anything that needs attention.

For developers — API access

Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.

API endpoint

POSThttps://api.kit.forhosting.com/home/baseboard-heater-sizing

Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.

Call it from your stack

curl -X POST https://api.kit.forhosting.com/home/baseboard-heater-sizing \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"floor_area":150,"climate":"moderate"}'

const res = await fetch("https://api.kit.forhosting.com/home/baseboard-heater-sizing", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "floor_area": 150,
    "climate": "moderate"
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/home/baseboard-heater-sizing",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "floor_area": 150,
    "climate": "moderate"
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/home/baseboard-heater-sizing", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => '{"floor_area":150,"climate":"moderate"}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"floor_area":150,"climate":"moderate"}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/home/baseboard-heater-sizing", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)

Example request

{
  "floor_area": 150,
  "climate": "moderate"
}

Example response

{
  "task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
  "type": "home.baseboard_heater_sizing",
  "status": "queued",
  "_links": {
    "result": "/tasks/tsk_…/result"
  }
}

The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.

Pricing

Per request$0.002

Published price — no tokens, no invented credits. A failed task is never charged.

Errors

HTTP	Code	Meaning
`401`	`unauthorized`	Missing or invalid API key.
`402`	`insufficient_balance`	Your balance doesn't cover the task price.
`404`	`unknown_type`	That task type doesn't exist.
`429`	`rate_limited`	Too many requests. Use the webhook instead of polling.

Read the full KIT documentation →