Loft targets derived from published biomechanics research including Tian et al. 2025 (PMID 39412632) and Lei et al. 2021 (PMID 34683013). Results are a calibration target, not a medical recommendation. Consult a clinician for diagnosed cervical conditions.
How to use this calculator
Select your primary sleep position, measure your shoulder width across both shoulders in inches, and choose your mattress firmness.
The calculator returns a compressed loft target range based on biomechanics research. Start in the middle of the range and adjust after a few nights of use.
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