- CALT stands for Centre for Advanced Learning Technologies (France)
- CALT stands for Computer Assisted Language Testing (various organizations)
- CALT stands for Certificate of Ancestral Land Titles (Philippines)
- CALT stands for Canadian Association of Law Teachers (Canada)
- CALT stands for Certified Academic Language Therapist (dyslexia)
- CALT stands for California Towhee (bird species)
- CALT stands for Committee for the Advancement of Learning and Teaching
- CALT stands for Civil Affairs Liaison Team
- CALT stands for Conjunctival-Associated Lymphoid Tissue
- CALT stands for Clearance Altitude
- CALT stands for Calibrated Accelerated Life Testing
- CALT stands for Control Altitude
- CALT stands for Contract Administration Lead Time
CALT