Common questions and answers about body fat measurement methods, accuracy, and best practices.
Body fat percentage is the total mass of fat divided by total body mass. It includes both essential fat (needed for basic bodily functions) and storage fat. This measurement is more meaningful than BMI for assessing body composition.
When measurements are done right, you can expect accuracy of ±3-4%. The key is consistent technique and site location. For best results, take measurements in the morning before eating or drinking.
You'll need a body fat caliper (also known as skinfold calipers). We recommend using professional-grade calipers like Harpenden or Lange for best results, though any calipers (like BOZEERA etc) will work.
For most people, we recommend starting with the Jackson & Pollock 3-site method. It provides a good balance of accuracy and simplicity. As you get more comfortable with measurements, you can try the 7-site method for potentially better accuracy.
PRO unlocks additional measurement methods including Jackson & Pollock 3,4,7-site formulas and Durnin & Womersley method. Perfect for fitness enthusiasts who want access to all validated formulas.
We recommend measuring every 2-4 weeks. This interval allows enough time to see meaningful changes while maintaining consistent progress tracking. Always measure at the same time of day (preferably morning) for best results.
Each method uses different measurements and equations optimized for specific populations. Variations can occur due to differences in body type, measurement technique, and the underlying assumptions of each method.
Yes! The app is suitable for both personal and professional use. The multiple measurement methods and unit conversion features make it a practical tool for trainers working with clients.
No! The PRO version is a one-time purchase of £9.99 / $9.99 / €9.99. You get lifetime access to all premium measurement methods and future updates. No hidden fees or subscriptions.
Several factors can impact accuracy: time of day, hydration status, recent exercise, measurement technique, and tool quality. Following our measurement guidelines helps minimize these variables.
Key indicators of proper technique include: consistent readings across multiple measurements (within 1-2mm), comfortable grip on the skinfold, and measurements that align with visual assessment. Consider having a professional demonstrate proper technique initially.
Yes! We provide support for all users. If you have questions about measurements, formulas, or technical issues, contact us at [email protected].
Skinfold measurements are generally more accurate and consistent than bioelectrical impedance (BIA). They're less affected by hydration status and recent meals, providing more reliable day-to-day tracking.
When performed correctly, our methods correlate strongly with DEXA results (r > 0.94). While DEXA remains the gold standard, our methods provide a practical, cost-effective alternative for regular tracking.
Yes! The app includes a progress tracking feature that lets you monitor changes over time. You can view trends, export data, and analyze your progress with detailed charts and statistics.
Yes, all formulas in our app are based on peer-reviewed research and have been validated against gold standard methods like hydrostatic weighing and DEXA. Each formula includes references to the original research.
First, verify your technique and measurement sites. Take multiple measurements at each site and ensure you're using the same locations each time. If problems persist, our support team can help troubleshoot.
Fat distribution patterns vary by gender, age, and genetics. Our methods account for these differences by using multiple measurement sites and gender-specific equations. This helps ensure accurate results across different body types.
Essential fat (2-5% for men, 10-13% for women) is necessary for basic bodily functions. Storage fat is additional fat tissue that serves as energy reserve. Both are included in body fat percentage measurements.
The Navy method typically achieves ±4-6% accuracy, while the YMCA method ranges from ±5-7%. While slightly less precise than skinfold methods, they provide reliable tracking when used consistently.
While some measurements can be done solo, having assistance improves accuracy, especially for hard-to-reach sites like the subscapular. If measuring alone, start with methods that use easily accessible sites.
Age and gender influence fat distribution and body composition. Our formulas account for these factors using age-adjusted equations and gender-specific calculation methods to maintain accuracy.
Morning measurements, before eating or drinking, provide the most consistent results. Avoid measuring after exercise or sauna use, as this can affect skin thickness and hydration status.
Clean calipers with alcohol wipes after use and store in their protective case. Check calibration regularly (especially for professional models). For tape measures, ensure they remain flat and undamaged.