Karvonen Formula Calculator

years
bpm
Measure on waking, before getting out of bed. Take the average of 3 days for best accuracy.
Health Updated 14 Jun 2026

Karvonen Formula Calculator is a health and wellness calculator that helps you calculate karvonen formula values from your input data. The formula used is: HRmax = 220 − age\nTarget HR = (HRmax − HRrest) × intensity% + HRrest\nHeart Rate Reserve (HRR) = HRmax − HRrest. Enter values using the units shown next to each input field (e.g. kg, cm, years).

Rates and fees change frequently. Always confirm the current figures with the official authority before relying on this result.
  • 220 − age is an approximation; true HRmax varies significantly between individuals.
  • Not suitable for patients with heart conditions — consult a cardiologist before high-intensity exercise.

Formula

HRmax = 220 − age Target HR = (HRmax − HRrest) × intensity% + HRrest Heart Rate Reserve (HRR) = HRmax − HRrest
  • Karvonen Formula Calculator gives you a fast estimate using your inputs and updates instantly when you change any value.
  • Formula: HRmax = 220 − age\nTarget HR = (HRmax − HRrest) × intensity% + HRrest\nHeart Rate Reserve (HRR) = HRmax − HRrest
  • Input definitions: • Age: the numeric age used in the calculation • Resting Heart Rate: the numeric resting heart rate used in the calculation
  • Manual method: write down each input, apply the formula step by step, then compare your manual result with the calculator output.
  • Enter values using the units shown next to each input field (e.g. kg, cm, years).
  • This calculator uses widely accepted health formulas and returns screening estimates only. It does not replace a diagnosis from a qualified healthcare professional.
  • Compare your result with published reference ranges. Values outside the normal range warrant a conversation with your doctor.
  • Practical tip: test a low, medium, and high scenario to understand sensitivity before making decisions.

Example Calculation

Inputs
  • Age: 30 years
  • Resting Heart Rate: 65 bpm

Suppose you enter: Age = 30, Resting Heart Rate = 65. The calculator applies the formula (HRmax = 220 − age\nTarget HR = (HRmax − HRrest) × intensity% + HRrest\nHeart Rate Reserve (HRR) = HRmax − HRrest) and shows all output values below. Change any input field to immediately see how the result changes.

Frequently asked questions

What is the Karvonen Formula?
The Karvonen Formula Calculator is a health and wellness calculator that helps you calculate karvonen formula values from your input data. Enter values using the units shown next to each input field (e.g. kg, cm, years).
When should I use this calculator?
Use this calculator whenever you need a quick, accurate result for karvonen formula values from your input data without working through the arithmetic manually.
What units should I enter?
Enter values using the units shown next to each input field (e.g. kg, cm, years).
How accurate are the results?
This calculator uses widely accepted health formulas and returns screening estimates only. It does not replace a diagnosis from a qualified healthcare professional.
How do I interpret the result?
Compare your result with published reference ranges. Values outside the normal range warrant a conversation with your doctor.
How can I verify the calculation manually?
Use the displayed formula and work through the numbers step by step. If your manual result differs slightly, check rounding and unit conversions first.
Can I use this for planning and budgeting?
Yes. Run best-case, expected, and worst-case inputs to compare outcomes and make safer planning decisions.

Related calculators

BMI Calculator Popular Calculate your Body Mass Index (BMI) from your height and weight and see which category it falls into. Enter your weight and height and this calculator returns your BMI, its category, and the healthy weight range for your height. Body Fat Calculator Popular Estimate your body fat percentage with the US Navy circumference method. Enter your sex, height, and a few tape measurements to see your body fat percentage, category, and healthy range. Lean Body Mass Calculator Lean Body Mass Calculator is a health and wellness calculator that helps you calculate lean body mass values from your input data. The formula used is: Boer (men): LBM = 0.407 × weight + 0.267 × height(cm) − 19.2\nBoer (women): LBM = 0.252 × weight + 0.473 × height(cm) − 48.3\nHume (men): LBM = 0.3281 × weight + 0.3393 × height(cm) − 29.534\nHume (women): LBM = 0.29569 × weight + 0.41813 × height(cm) − 43.293. Enter values using the units shown next to each input field (e.g. kg, cm, years).