Zone 2 Heart Rate Calculator for Rowing
Use this Zone 2 heart rate calculator to estimate your aerobic base training range in bpm. Enter your age and optional resting heart rate, then compare your Zone 2 heart rate range using % max heart rate vs the Karvonen (heart rate reserve/HRR) method. Your result is a low-high bpm target you can use for easy running, cycling, or cardio sessions. Copy or share a link that saves your inputs. Estimates only. Not medical advice.
Your Zone 2 heart rate range (bpm)
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Enter your age (and optional resting HR) to see your Zone 2 heart rate range.
Compare Zone 2 methods
% max HR
-
60-70% of max HR.
Heart rate reserve (Karvonen)
Add resting HR
Resting HR + 60-70% of reserve.
Add resting HR to compare Karvonen (HRR) versus % max.
Assumptions
- Max HR method: 206.9 - 0.67 × age.
- Selected method: % max HR.
- Zone 2 intensity: 60-70%.
- HRR formula: Resting HR + % of reserve.
Estimates only. Not medical advice.
Methods & assumptions
This variant focuses on Zone 2 Heart Rate Calculator for Rowing.
This Zone 2 heart rate calculator returns a Zone 2 heart rate range as a low-high target in beats per minute (bpm). It shows two common methods side-by-side: percent of max heart rate (% max HR) and heart rate reserve (Karvonen / HRR).
Tip: If you are looking for a zone 2 karvonen calculator, choose heart rate reserve (Karvonen / HRR) and enter your resting heart rate.
What your result means
- Zone 2 heart rate range: A target bpm range for steady aerobic base sessions.
- Talk test: You should be able to speak in full sentences at a comfortable effort.
- Heart rate drift: On longer sessions, heart rate can creep up. Keep the effort easy and use the range as a guide, not a hard ceiling.
Example
Age 40, resting HR 55 (Tanaka) → % max: 108-126 bpm · Karvonen/HRR: 130-143 bpm
Max heart rate (HRmax) estimates
- 220 - age (simple estimate)
- 206.9 - 0.67 × age (Tanaka)
- Manual max HR (best if you have tested it)
Zone 2 definitions
%max: Zone 2 = 60–70% of HRmax
Karvonen/HRR: HR = HRrest + intensity × (HRmax − HRrest)
Intensity for Zone 2 is 0.60-0.70. HRrest is your resting heart rate. All results are rounded to whole bpm.
More variants
Focused on zone 2 karvonen calculator.
Focused on zone 2 heart rate cycling.
Focused on zone 2 with resting heart rate.
Focused on Zone 2 Heart Rate Calculator for Running.
Focused on Zone 2 Heart Rate Calculator for Cycling.
Focused on Zone 2 Calculator for Beginners.
Focused on Zone 2 for Fat Loss Calculator.
Focused on Zone 2 Karvonen Calculator (HRR).
Focused on Zone 2 Calculator Without Max HR.
Focused on Zone 2 Calculator for Treadmill Walking.
Questions & Answers
Clear answers, so you can use this tool with confidence.
Percent of max uses only your estimated max heart rate (HRmax). Karvonen (heart rate reserve / HRR) starts at your resting heart rate (HRrest) and then adds a percentage of the difference between HRmax and HRrest. Because HRR includes HRrest, the Zone 2 range is often higher than % max. Both methods are estimates, so pick one method and apply it consistently.
If you know your resting heart rate and you measure it consistently, Karvonen (HRR) is usually the better default because it personalizes your targets. If you do not know resting HR, % max heart rate is a solid baseline. Whichever you choose, use the same method over time so your training stays consistent.
Yes. Age-based max heart rate formulas are common starting points, and you can sanity-check Zone 2 with the talk test (you should be able to speak in full sentences). For zone 2 heart rate cycling, heart rate can lag behind effort and drift upward over long rides, so use perceived effort (RPE) and power (if available) as a cross-check.
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