Hiring a calibration laboratory shouldn't feel like a gamble.
when preparing for ISO 9001 or AS9100 audits, after instrument repair or purchase, or when measurement traceability must be formally documented for regulatory compliance, you need a provider who shows up on time, knows their craft, and won't drop the ball on the details. But you're stuck cold-calling strangers from a Google search.
What's at stake when you hire the wrong one?
Substandard work
Missed details, incomplete deliverables, or unqualified staff. You won't know until it's too late.
Wasted budget
Rework, remobilization, and re-scheduling. Typical lost cost: $500-5,000 per calibration engagement.
Downstream risk
Failed audits, delayed projects, or compliance exposure. One bad hire can cost you the whole engagement.
The solution
Calledger takes the guesswork out of hiring.
We built this directory for manufacturers and quality assurance teams who need calibration laboratories. Compare business information and reported credentials in one place. Sponsored placements are labeled; payment does not change customer ratings or establish professional qualifications.
Every listing is researched
We cross-reference business records, industry databases, and professional profiles. ISO/IEC 17025 status is front and center on every listing.
Local-first results
152+ providers across 95 cities in 46 states. Check each provider’s location and service area to confirm they cover your project.
Direct quote requests
Submit your project details from any listing page — date, location, scope of work. We route your request to the provider so you can discuss your project directly.
Free for manufacturers and quality assurance teams — always
No account, no subscription, no hidden fees. Search the full directory, compare providers, and request quotes at zero cost.
How it works
Search your city
Enter a city name or zip code. We'll show you every listed calibration laboratory in range.
Compare providers
Review credentials, certifications, services, and reviews. Add multiple providers to your quote list.
Request quotes
Submit your project details — date, location, services needed. Providers respond directly to your inbox.
How we curate listings
Every listing goes through a multi-point verification process. Businesses can pay for clearly labeled sponsored placement. Ownership verification confirms who manages a profile; it is separate from professional licensing and credential checks.
Business verification
We confirm the business exists, is currently operating, and serves the listed markets.
Contact validation
Phone numbers, websites, and addresses are checked against public records.
Credential tracking
ISO/IEC 17025 and other certifications are flagged and checked where possible.
Review aggregation
Ratings and review data pulled from Google, Yelp, and industry sources.
Read our full Editorial Guidelines for details on our methodology.
The team
Nick Palmer
Founder & Lead Researcher
Nick built this directory to help quality teams find accredited calibration labs without wading through unaccredited shops that can’t support an ISO audit — a gap he discovered when sourcing calibration vendors for a manufacturing client whose instrument traceability chain failed a third-party audit.
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Search is free. No account needed. Find qualified providers in your city in under a minute.
Questions?
We're a small team and we read every email.
365 Clinton Avenue, Apt 12B, Brooklyn, NY 11238