PSI to ATM converter
1 psi is 0.06804596391 standard atmospheres, taken from the exact definitions of the atmosphere and the pound-force per square inch. Turn gauge, compressor or process readings in psi into atmospheres without the truncated 14.7 rule. Free in your browser.
- Free
- Runs in your browser
- No sign-up
- Your data stays on your device
Run — free
Worked example
- Psi
- 1
- Result
- 0.0680459639 atm
- Converted
- 0.0680459639
- Atm
- 0.0680459639
- From unit
- psi
A pounds-per-square-inch to atmospheres converter turns a gauge or process pressure written in psi into the standard atmospheric unit used in chemistry textbooks, gas-law homework, scuba reference tables, and many European process sheets. Rough classroom shortcuts such as divide by fourteen point seven are rejected in favour of the full SI-derived constant, so homework checks and catalog exports match engineering tables.
Why psi and atmospheres still meet at an exact factor
Pounds per square inch remain the everyday pressure unit on many United States tyre placards, air-tool ratings, hydraulic benches, compressor nameplates, and process instrumentation. Standard atmospheres belong to the gas-law and weather family used in chemistry textbooks, barometric reference tables, and ideal-gas homework.
The bridge between them is not a memorised divide-by-fourteen-point-seven rule of thumb: one standard atmosphere is defined as exactly one hundred one thousand three hundred twenty-five pascals, and one pound-force per square inch follows from the international avoirdupois pound, standard gravity nine point eight zero six six five metres per second squared, and the exact inch of zero point zero two five four metres. That makes the conversion a single exact multiplication, atmospheres equals psi times the ratio of those two pressure scales.
Teachers often still teach divide by fourteen point seven, but that truncates several significant figures and drifts on multi-atmosphere compressor stages or laboratory gauge chains.
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 about fourteen point six nine five nine four eight seven seven five five one three psi and confirm you receive one atmosphere after rounding, or convert twice that value and confirm the result doubles within the same twelve-decimal policy.
When teaching, pair the exact path with the fourteen point seven mental shortcut so students see the truncated error on multi-atmosphere stages. Stay inside the absolute range so the multiply cannot overflow into a non-finite result the solver must reject. This landing targets people searching for psi to atm, convert pounds per square inch to atmospheres, or an exact atmosphere pressure calculator from psi; it is not a general multi-unit pressure hub, not an atm-to-psi primary form, not a vacuum torr converter, and not a tyre-load or scuba dive-table tool.
Prefer this capability when the input is already in psi and you only need standard atmospheres; if you must convert among many pressure units in one call, use a broader pressure converter instead.
What you can do with it
Process-sheet and textbook unit bridging
Turn US psi setpoints from equipment sheets into standard-atmosphere fields on European or chemistry-lab tables with the same exact factor every row.
Homework and lab report checks
Students convert classroom psi readings to atmospheres and compare hand work against deterministic steps before submitting worksheets.
Gauge, tyre, and compressor cross-checks
Technicians and hobbyists map psi gauge readings into atm-scale reference tables without relying on a rounded 14.7 shortcut.
FAQ
What factor converts psi to atm?
One standard atmosphere is 101325 Pa exactly. One psi is one pound-force per square inch from the international pound, standard gravity, and the exact inch. The tool multiplies psi by that exact SI-derived ratio (about 0.06804596391).
Is dividing by 14.7 exact?
No. 14.7 is a common classroom rounding of psi per atmosphere. This converter uses the full SI-derived factor so results match engineering tables after fixed twelve-decimal rounding.
What input field do I send?
Send a finite number in the field psi.
Is the psi to atm converter free?
The browser tool is free and runs locally.
How many psi make one atmosphere?
14.695948775513 psi make exactly one standard atmosphere, which is 101325 pascals. Entering that value returns 1 atm, and twice that value returns 2 atm, so you can check the result yourself.
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/psi-to-atm \
-H "Authorization: Bearer $KIT_KEY" \
-H "Content-Type: application/json" \
-d '{"psi":14.695948775513}'const res = await fetch("https://api.kit.forhosting.com/conv/psi-to-atm", {
method: "POST",
headers: {
"Authorization": `Bearer ${process.env.KIT_KEY}`,
"Content-Type": "application/json"
},
body: JSON.stringify({
"psi": 14.695948775513
})
});
const { task_id } = await res.json();import os, requests
res = requests.post(
"https://api.kit.forhosting.com/conv/psi-to-atm",
headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
json={
"psi": 14.695948775513
},
)
task_id = res.json()["task_id"]<?php
$res = file_get_contents("https://api.kit.forhosting.com/conv/psi-to-atm", false, stream_context_create([
"http" => [
"method" => "POST",
"header" => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
"content" => '{"psi":14.695948775513}',
],
]));
$task = json_decode($res, true);body := bytes.NewBufferString(`{"psi":14.695948775513}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/conv/psi-to-atm", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)Example request
{
"psi": 14.695948775513
}Example response
{
"task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
"type": "conv.psi_to_atm",
"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.
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 or missing input fails with a clear invalid_input error instead of inventing a number.
How to call the API and what comes back
Absolute values must stay within the published limit of one trillion. Send a JSON body with one required finite number field named psi. Aliases pounds_per_square_inch, value, pressure, psi_value, and psig are accepted so SDK clients and form posts can use the name that fits the product. On success the response echoes rounded psi, sets atm, result, and converted to the same rounded atmosphere magnitude, unit to the token atm, from_unit to psi and to_unit to atm, factor and atm_per_psi to the rounded exact conversion factor, pa_per_atm to the integer one hundred one thousand three hundred twenty-five, formula to a short English equation string, message to a brief summary, and steps to an ordered array of substitution lines. Failed validation—missing fields, non-finite numbers, 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 and zero marginal unit price.
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 psi or pass text.
Technical questions
What happens on invalid input?
Missing fields, non-finite numbers, or values outside the absolute limit return invalid_input. Failed tasks are never charged.