CARDIO · RESTING HEART RATE
Resting Heart Rate Calculator
Assess cardiovascular fitness from your resting heart rate — classification, cardio age, and improvement targets.
Try a preset
Result
Average cardiovascular fitness. Consistent cardio 3–4×/week can shift this up a tier.
Your heart age matches your calendar age.
Fitness scale
Where your RHR sits across the six cardiovascular fitness tiers.
How to use it
- Open Resting Heart Rate Calculator and enter your current baseline accurately.
- Adjust one variable at a time so changes are easy to interpret.
- Review the headline output first, then inspect supporting metrics.
- Run at least one conservative and one aggressive scenario.
- Use outputs to set your next training or nutrition action for the week.
- Save or share this setup if you want to revisit it later, then check one easier and one harder version before you change your plan.
Questions people usually ask
What is a resting heart rate?
Your resting heart rate (RHR) is the number of times your heart beats per minute when you're at rest. It's best measured in the morning before getting out of bed.
What is a normal resting heart rate?
For most adults, a normal RHR is 60–100 bpm. Athletes often have RHRs of 40–60 bpm due to more efficient cardiac output from regular training.
Why does a lower RHR indicate better fitness?
A well-trained heart pumps more blood per beat, so it needs fewer beats per minute to circulate blood. Lower RHR generally reflects stronger cardiovascular efficiency.
How is cardiovascular age estimated?
Cardio age adds or subtracts years from your actual age based on your fitness classification. An Athlete classification subtracts 6 years; a Poor classification adds 5 years.
Is this tool free and private to use?
Yes. AI Fit Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Do these tools replace medical guidance?
No. These outputs are general fitness estimates — not medical advice. Consult a healthcare professional for heart health guidance.
Related Resources
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