Best free lab calculators
Free calculators we checked that run in your browser with no sign-up. We don't make or sponsor any of them.
Verify calculations against your lab's SOP. These are general bench tools, not part of any regulated test procedure.
LabCalc
Best for: A big all-in-one suite: its site lists 38 calculators for solutions, buffers, dilutions, PCR and more, running in your browser with no account.Lab Manuals calculators
Best for: Four quick bench tools (molarity, serial dilution, RCF/RPM and Henderson-Hasselbalch buffer pH) that work on a phone.BioToolsKit lab calculators
Best for: A collection of 14 lab calculators, from molarity to buffer prep, plus separate DNA, PCR and protein tool sections.
Best for: A big all-in-one suite: its site lists 38 calculators for solutions, buffers, dilutions, PCR and more, running in your browser with no account.Lab Manuals calculators
Best for: Four quick bench tools (molarity, serial dilution, RCF/RPM and Henderson-Hasselbalch buffer pH) that work on a phone.BioToolsKit lab calculators
Best for: A collection of 14 lab calculators, from molarity to buffer prep, plus separate DNA, PCR and protein tool sections.
Official lookups
- FDA CLIA database: a test system's complexity category.
- CMS CLIA program: certificates, fees and your State Agency contact.
Descriptions are from each site's own page, checked Oct 18, 2026. No affiliate links.