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Free data center and critical facility calculators: UPS runtime, cooling load, CFM, rack power, generator sizing, kVA, PUE and dew point. Every formula shown.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | sqlchat.ai | loadcairn.com |
| Pricing | ||
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of SQL Chat yet.
LoadCairn is a set of free planning and sizing calculators for data centers and critical facilities. Every calculator shows its formula and assumptions, so engineers can check the math instead of trusting a black box. Calculators include: - UPS runtime - Cooling load - Airflow / CFM - Rack power...
What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing SQL Chat and LoadCairn.
LoadCairn's answer:
Every calculator shows its formula, inputs and assumptions, with references to ASHRAE and NIST. Engineers can check the math instead of trusting a vendor tool that hides it.
LoadCairn's answer:
Vendor calculators from APC, Eaton and Vertiv are tied to their own products and don't show their work. LoadCairn is vendor-neutral, free with no account, and covers power, cooling and facility metrics in one place. It also works offline in data halls with no signal.
LoadCairn's answer:
Critical facility engineers, data center technicians, facility managers, MEP consultants, data center project teams and students.
LoadCairn's answer:
I've worked in data centers for 20 years. Most sizing still happens in old spreadsheets or vendor tools that won't show the math. I built LoadCairn so engineers have quick, transparent estimates they can defend in a design review.
LoadCairn's answer:
A web app built on the Polsia platform. It installs on phone or laptop as a progressive web app (PWA) and works offline.
LoadCairn's answer:
Not available at this thime.
Share your experience with using SQL Chat and LoadCairn. For example, how are they different and which one is better?
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