How long does calibration take? ATI Marketing April 24, 2018 18:45 Updated Follow Calibration takes 7-10 business days from the date we receive your unit. Related articles How much does calibration cost? Where do I ship my unit? U.S. Government Study, Implementing Best Practices in BioSafety/BioSecurity End of Life Announcement – DOP Oil End of Life Announcement - 100P, 100S Comments 0 comments Please sign in to leave a comment.