Estimate your body fat percentage using the U.S. Navy method.
The U.S. Navy body fat formula uses circumference measurements to estimate body fat percentage. While not as accurate as DEXA scans or hydrostatic weighing, it provides a reasonable estimate with just a tape measure.
For Men: Body Fat % = 86.010 * log10(waist - neck) - 70.041 * log10(height) + 36.76
For Women: Body Fat % = 163.205 * log10(waist + hip - neck) - 97.684 * log10(height) - 78.387