Orangetheory Heart Rate Zone Calculator
Calculate your custom OTF zones and Max Heart Rate (MHR) using the Tanaka formula.
Your Estimated Max HR: BPM
Understanding Orangetheory Heart Rate Zones
Orangetheory Fitness utilizes five color-coded heart rate zones to monitor intensity during a workout. The primary goal for most members is to spend at least 12 minutes in the "Orange" and "Red" zones combined to earn what are known as "Splat Points." This specific duration is designed to trigger the Afterburn effect, or EPOC (Excess Post-exercise Oxygen Consumption).
How the Calculation Works
Most Orangetheory studios use the Tanaka Formula (208 – 0.7 * Age) to determine your initial Maximum Heart Rate (MHR). While the standard formula (220 – Age) is common in the fitness industry, the Tanaka formula is considered more accurate for a wider range of ages, particularly active adults.
The Five Zones Explained
- Grey Zone (50-60%): This is your recovery or very light activity zone. You are usually in this zone during the warm-up or while waiting for class to start.
- Blue Zone (61-70%): A light intensity zone. This is often where you'll find yourself during a "base pace" or active recovery between intervals.
- Green Zone (71-83%): The "Challenging but Doable" zone. This represents a steady-state aerobic effort. You should spend a significant portion of the class here.
- Orange Zone (84-91%): This is the target zone. It feels uncomfortable and requires significant effort. You earn 1 Splat Point for every minute spent here.
- Red Zone (92-100%): The "All Out" zone. This is maximum effort, typically reserved for short bursts of energy at the end of a block.
What are Splat Points?
A Splat Point is simply a minute spent in the Orange or Red heart rate zones. The "Magic Number" at Orangetheory is 12. Science suggests that achieving 12 minutes or more in these higher-intensity zones increases your metabolic rate for up to 24-36 hours after the workout has ended.
Practical Example
If you are a 40-year-old athlete using the Tanaka formula:
Calculation: 208 – (0.7 * 40) = 180 BPM.
Your Orange Zone starts at 84% of 180, which is 151 BPM. To earn Splat Points, you must maintain a heart rate of at least 151 BPM during your intervals.