Check body fat percentage using a DEXA scan
Use an air displacement test (BodPod) for body fat percentage
Use hydrostatic (underwater) weighing for body fat percentage
Use bioelectrical impedance scales (BIA) and record results consistently
Use BIA hand/foot devices or smart scales and compare trends over time
Use skinfold calipers and a standardized method (same tester and sites)
Use circumference-based methods (waist/hip measurements) and a validated calculator
Use waist-to-height ratio from waist and height measurements
Measure waist circumference at the same location each time
Use body composition calculators that estimate from height, weight, age, sex, and waist (if validated)
Track trends with the same conditions (morning, after bathroom, similar hydration, no exercise beforehand)
Confirm accuracy by using the same method repeatedly and avoiding switching methods frequently
Consult a clinician or certified trainer for standardized testing (calipers, measurements, interpretation)