Cubic feet to cubic meters converter
1 cubic foot is exactly 0.028316846592 cubic meters: turn imperial volumes from US HVAC plates, crate notes and take-offs into the metric figure used on tank plates, international freight papers and metric drawings. Free in your browser.
- Free
- Runs in your browser
- No sign-up
- Your data stays on your device
Run — free
Worked example
- Cubic feet
- 1
- Result
- 0.0283168466 m³
- Converted
- 0.0283168466
- Cubic meters
- 0.0283168466
- From unit
- ft³
A cubic-feet-to-cubic-meters converter turns an imperial volume into the SI cubic-meter value used on metric tank plates, international bills of lading, laboratory glassware notes, and construction take-offs that quote metric capacity. Approximate mental shortcuts such as multiply by zero point zero two eight three are rejected in favour of that exact constant, so homework checks and product tables match engineering definitions.
Why cubic feet and cubic meters still meet at 0.3048 cubed
International cubic feet remain everyday volume on many US HVAC nameplates, residential room-air rules of thumb, freight notes that quote crate cubes, and civil take-offs that still mix imperial volume with metric linear drawings. Cubic meters belong to the SI derived unit for volume used in science, metric building drawings, tank capacities outside the United States, and most international product specifications.
The bridge between them is not a survey approximation: since the 1959 international yard and pound agreement, one international foot is defined as exactly zero point three zero four eight metres, so one cubic foot is exactly that length cubed—zero point zero two eight three one six eight four six five nine two cubic meters. That makes the conversion a single exact multiplication: cubic meters equals cubic feet times zero point zero two eight three one six eight four six five nine two.
Teachers and estimators often still teach the rough rule of thumb multiply by zero point zero two eight three, but that introduces a scale error that shows up immediately on a large tank or a whole-building air volume. Zero cubic feet maps cleanly to zero cubic meters. Negative volumes are rejected because a physical volume is nonnegative; signed deltas belong in a different tool.
Practical tips, checks, and related searches
Prefer sending bare numbers when you control the client; string numbers are accepted only when they match a strict finite numeric pattern without units, thousand separators, or currency symbols. Round-trip sanity checks are easy: convert a known textbook value such as one cubic foot and confirm you receive exactly zero point zero two eight three one six eight four six five nine two cubic meters after rounding, or convert one hundred cubic feet and confirm two point eight three one six eight four six five nine two cubic meters.
When teaching, pair the exact path with the mental shortcut so students see the drift on large tanks. Stay inside the published range so the multiplication cannot overflow into a non-finite result the solver must reject. This landing targets people searching for cubic feet to cubic meters, ft3 to m3, or convert ft³ to m³ with an exact factor calculator; it is not a general multi-unit volume hub, not a cubic-meters-to-cubic-feet primary form, not a litres or gallons tool, and not a gas molar-volume converter.
Prefer this capability when the input is already in cubic feet and you only need SI cubic meters; if you must convert among many units in one call, use a broader unit converter instead. Keep requests small, pin the rounded cubic-meter value in tests, and you get reproducible results for homework, LMS plugins, and automation scripts without standing up a computer-algebra system of your own.
What you can do with it
HVAC and room air volume notes
Turn US cubic-foot room or duct volumes into SI cubic meters for metric equipment tables, commissioning sheets, and international project specs with the same exact factor every row.
Shipping and freight crate checks
Logistics teams convert cubic-foot crate capacities to cubic meters and compare hand work against deterministic steps before quoting metric freight.
FAQ
What formula converts cubic feet to cubic meters?
Cubic meters = cubic feet × 0.028316846592. One international foot is exactly 0.3048 m, so one cubic foot is exactly 0.3048³ m³.
Is 0.028316846592 exact or approximate?
Exact under the international foot definition. This tool uses 0.3048³, not a survey-foot or a rough multiply-by-0.0283 estimate.
Can I convert cubic meters back to cubic feet?
This capability is cubic feet → cubic meters only. Divide cubic meters by 0.028316846592 on your side, or use a bidirectional volume converter for other units.
Is the cubic feet to cubic meters converter free?
The browser tool is free and runs locally.
Why not just multiply by 0.0283?
Because that shortcut is rounded and drifts as volumes grow. The difference is tiny for one crate but shows up clearly on a large tank or a whole-building air volume, so the converter always uses the exact constant.
Related tools
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
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/conv/cubic-feet-to-cubic-meters \
-H "Authorization: Bearer $KIT_KEY" \
-H "Content-Type: application/json" \
-d '{"cubic_feet":1}'const res = await fetch("https://api.kit.forhosting.com/conv/cubic-feet-to-cubic-meters", {
method: "POST",
headers: {
"Authorization": `Bearer ${process.env.KIT_KEY}`,
"Content-Type": "application/json"
},
body: JSON.stringify({
"cubic_feet": 1
})
});
const { task_id } = await res.json();import os, requests
res = requests.post(
"https://api.kit.forhosting.com/conv/cubic-feet-to-cubic-meters",
headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
json={
"cubic_feet": 1
},
)
task_id = res.json()["task_id"]<?php
$res = file_get_contents("https://api.kit.forhosting.com/conv/cubic-feet-to-cubic-meters", false, stream_context_create([
"http" => [
"method" => "POST",
"header" => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
"content" => '{"cubic_feet":1}',
],
]));
$task = json_decode($res, true);body := bytes.NewBufferString(`{"cubic_feet":1}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/conv/cubic-feet-to-cubic-meters", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)Example request
{
"cubic_feet": 1
}Example response
{
"task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
"type": "conv.cubic_feet_to_cubic_meters",
"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
Published price — no tokens, no invented credits. A failed task is never charged.
Limits
max_abs | 1000000000000 |
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. |
Technical notes
Invalid, negative, or missing input fails with a clear invalid_input error instead of inventing a number.
How to call the API and what comes back
The value must be greater than or equal to zero and must stay within the published limit of one trillion. Send a JSON body with one required finite nonnegative number field named cubic_feet. Aliases cubic_ft, ft3, ft³, cu_ft, cuft, value, volume, and feet_cubed are accepted so SDK clients and form posts can use the name that fits the product. On success the response echoes rounded cubic_feet, sets cubic_meters, result, and converted to the same rounded cubic-meter magnitude, unit to the token m³, from_unit to ft³ and to_unit to m³, factor to the exact constant zero point zero two eight three one six eight four six five nine two, cubic_meters_per_cubic_foot to that same constant, meters_per_foot to zero point three zero four eight, formula to the string cubic_meters equals cubic_feet times zero point zero two eight three one six eight four six five nine two, message to a short English summary, and steps to an ordered array of substitution lines. Failed validation—missing fields, non-finite numbers, negative volumes, bare plus or minus signs, non-numeric strings, values outside absolute limits, or a non-finite converted result—returns invalid_input and is never charged. Pricing is a flat $0.002 per successful request with unit item. Prefer sending bare JSON numbers when you control the client; numeric strings are accepted only when they match a strict finite numeric pattern without units, thousand separators, or currency symbols.
Practical tips, checks, and related searches
Failed tasks that return invalid_input do not consume prepaid balance, which keeps exploratory scripts cheap when learners deliberately omit cubic_feet or pass text.
Integration use cases
Homework and unit-test fixtures
Students and engineers convert classroom cubic-foot readings to cubic meters and pin golden JSON so browser and API arithmetic never drift.
Technical questions
What happens on missing, negative, or non-numeric input?
The API returns invalid_input naming the problem (for example a missing or negative cubic_feet field). Failed tasks are not charged.