How accurate is the calorie tracking on the Oura Ring?

The accuracy of calorie tracking on the Oura Ring is generally considered good, although not flawless. Like many wearable devices that track physical activity and calories, the Oura Ring utilizes sensors and algorithms to estimate total energy expenditure throughout the day. While direct comparisons to lab measurements or gold-standard calorimetric techniques may reveal discrepancies, for everyday use, the ring offers a useful approximation of calorie burn. Its primary focus is on resting metabolic rate, rather than active calories, which can make it less precise for specific exercise tracking. However, users find that it provides valuable insights into their overall activity levels and health trends when used consistently over time.