Perceived Exertion Converter MCP for AI. Turn your felt effort into objective training data
Works with every AI agent you already use
…and any MCP-compatible client








Connect to your AI in seconds.
Perceived Exertion Converter MCP lets you turn subjective effort into hard numbers. If you know how hard you're working on a scale of 1 to 20, this tool estimates your heart rate, training zones, and intensity levels.
It's for people who want to track progress without always wearing a chest strap or watch.
What your AI can do
Convert cr10 scale
Converts a CR10 scale rating into physiological metrics and capacity percentages.
Get training guidance
Provides coaching advice and intensity descriptions based on your reported effort.
Convert borg 6 20 scale
Turns a Borg 6-20 score into a heart rate and training zone estimate.
Turns your reported effort level into an estimated beats per minute count.
Places your current effort into categories like Aerobic or Threshold.
Shows what percentage of your maximum heart rate you are currently hitting.
Provides practical tips on how to adjust your intensity based on how you feel.
Translates the 1-10 scale into physiological data.
Helps you see when you are pushing into high-intensity endurance limits.
Ask an AI about this
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Perceived Exertion Converter (3 tools)
Convert your effort scores into heart rate estimates and coaching advice using three specialized tools.
Make your AI actually useful.
Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.
Start using Perceived Exertion Converter on VinkiusConvert Cr10 Scale
Converts a CR10 scale rating into physiological metrics and capacity percentages.
Get Training Guidance
Provides coaching advice and intensity descriptions based on your reported effort.
Convert Borg 6 20 Scale
Turns a Borg 6-20 score into a heart rate and training zone estimate.
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Works with Claude, ChatGPT, Cursor, and more
The Model Context Protocol standardizes how applications expose capabilities to LLMs. Instead of operating in isolation, your AI gains direct access to external platforms, live data, and real-world actions through secure, standardized connections.
This connection provides 3 powerful capabilities that interface natively with Claude, ChatGPT, Cursor, and other compatible AI platforms. No middleware. No custom integration required.
Tired of guessing your actual intensity.
You finish a hard run and wonder if you actually hit your target zone. You didn't wear a heart rate monitor, so you're left guessing based on how your lungs feel. You end up scrolling through old logs, trying to remember if that hill was "hard" or "all out."
This MCP removes the guesswork. Just tell your agent how hard you worked, and it gives you the numbers. You get a clear picture of your heart rate and training zone instantly.
Get objective data from the Perceived Exertion Converter.
You no longer have to manually calculate percentages or look up effort scale charts while you're trying to focus on your set. The math happens in the background.
You get immediate, actionable data that helps you train smarter. It turns your intuition into a measurable metric.
What your AI can actually do with this
Training often feels like a guessing game. You know you're pushing hard, but knowing exactly where that effort lands on a physiological curve is much harder to track. This MCP bridges that gap by turning your internal sense of effort into concrete data points. Instead of just saying a workout felt "tough," you can get specific estimates on your heart rate and which training zone you actually hit.
It helps you stay consistent by giving you a way to measure intensity even when you aren't wearing a heart rate monitor or a chest strap. You can use it to see if you're actually hitting your aerobic targets or if you're redlining too early during a session. Because it's hosted on Vinkius, you can plug it into your existing setup and have these calculations ready whenever you're logging a workout.
It takes the guesswork out of your training plan by providing clear, actionable coaching advice based on how you feel in the moment. It helps you interpret your own body's signals with more precision, making it easier to adjust your pace, rest intervals, and overall volume. By converting subjective feelings into objective metrics, you can build a more accurate picture of your fitness progress.
019ee5c2-503b-725e-9384-29e084127bca Here's how it actually works
The bottom line is you get objective data from subjective feelings.
Tell your AI client your current effort score and your maximum heart rate.
The MCP processes the math based on the specific scale you chose.
You get back your estimated heart rate, training zone, and coaching tips.
Who is this actually for?
Athletes who want to track intensity without the hassle of constant heart rate monitoring or those who prefer subjective effort scales to monitor training load.
Tracks weekly mileage and ensures they stay in the aerobic zone without checking their watch every mile.
Explains intensity to clients using RPE but wants to see the underlying physiological estimates.
Monitors high-intensity intervals and needs to know if they're hitting anaerobic limits.
What Changes When You Connect
Stop guessing your heart rate by using convert_borg_6_20_scale to get real-time estimates during your workouts.
Stay in your target training zones with convert_cr10_scale providing the exact percentage of your max capacity.
Get immediate coaching feedback from get_training_guidance to adjust your pace or rest periods on the fly.
Track progress over time by turning "felt" effort into a consistent set of physiological metrics.
Train effectively in environments where heart rate monitors aren't practical or allowed.
Quickly switch between different effort scales depending on the specific needs of your workout.
See it in action
Verifying aerobic zones
A runner feels tired and asks their agent to check if their current effort level is keeping them in the aerobic zone.
Swimming without a watch
A swimmer wants to know their heart rate without a watch and asks for an estimate based on a maximum heart rate of 180.
Adjusting weight intensity
A weightlifter hits a plateau and asks for help, receiving advice on whether their intensity is too high for recovery.
Analyzing hill climbs
A cyclist wants to check if their hill climb was truly anaerobic and asks for a verification of their effort score.
The honest tradeoffs
Trying to guess heart rate without a max HR
Asking for a heart rate without providing a maximum.
Provide your max heart rate along with the effort score so the math can be calculated correctly.
Using the wrong scale for the wrong goal
Using a broad scale for a very precise, narrow rating.
Use the wider scale for general feeling and the more granular scale for specific intensity levels.
Asking for a full training plan instead of immediate guidance
Asking for a 12-week marathon plan.
Ask for specific advice on what your current effort level means for your next set or interval.
When It Fits, When It Doesn't
Use this if you need to translate subjective effort into heart rate estimates or training zones without a wearable device. It's perfect for endurance athletes, strength coaches, and anyone who uses the Borg or CR10 scales to monitor training load. Don't use this if you need a full workout generator or a database to store your historical heart rate logs. It doesn't create a training plan; it interprets the effort you're feeling right now. If you need to track heart rate via a live sensor, use a dedicated wearable integration instead.
Questions you might have
What does the Perceived Exertion Converter do? +
It turns your subjective effort (RPE) into heart rate estimates and training zones. It's great for tracking intensity without a watch.
How do I use the Borg scale with this MCP? +
Tell your agent your effort score (6-20) and your max heart rate. The system will then give you the estimated BPM and zone.
Does the Perceived Exertion Converter work for weightlifting? +
Yes, it's highly effective for strength training where RPE is a standard way to measure intensity.
Can I get coaching tips with this MCP? +
Yes, ask for descriptions of what your effort level means and get advice on how to adjust your training accordingly.
What is the difference between the two conversion tools? +
One covers a wide range of effort, while the other provides more granular metrics for specific intensity levels.
Which apps support the Perceived Exertion Converter? +
You can use this MCP with any compatible client like Claude, Cursor, Windsurf, or VS Code. Once you connect it through Vinkius, your agent can use the tools immediately.
Does the Perceived Exertion Converter store my health data? +
No, this MCP doesn't save any of your personal information. It only processes the numbers you enter during your session to provide real-time calculations and coaching advice.
What inputs are required for the convert_borg_6_20_scale tool? +
You need to provide your RPE score on the Borg scale and your maximum heart rate. The MCP then calculates your estimated heart rate and identifies your specific training zone.
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