Dr. David Taylor, MD, PhD · Last reviewed June 11, 2026

Fat-Burning Heart Rate Calculator

Enter your age to see your fat-burning heart rate zone — 60–70% of your maximum heart rate, where your body burns the highest share of calories from fat. Compare four formulas side-by-side (Standard, Tanaka, Karvonen, and a women-specific equation), see all five training zones at once, and check which zone your live pulse is in.

Fat-Burning Heart Rate Calculator

Fat-burning zone · 60–70%
108–126 bpm
sweet spot ≈ 117 bpm
Max heart rate · 220−age
180 bpm
220 − age
Check your live HR
bpm now
Type your pulse to find your zone.

Train at 60–70% of your maximum heart rate to keep fat as the dominant fuel source. It's a moderate, conversational pace you can hold for 30–60 minutes — the cornerstone of steady-state cardio.

Your five heart-rate zones
Very light
Warm-up / recovery
— bpm
50–60%
Fat burn Fat burn
Light · highest fat fuel share
— bpm
60–70%
Aerobic
Cardio · endurance
— bpm
70–80%
Anaerobic
Hard · performance
— bpm
80–90%
Maximum
VO₂ max · all-out
— bpm
90–100%
Fat-burn zone across methods

Educational reference only. Age-predicted maximum heart rate carries a standard deviation of roughly ±10–12 bpm, so your true max can differ meaningfully from any formula. If you take a beta-blocker or other rate-limiting medication, or have an arrhythmia, pacemaker, or known heart disease, age-predicted zones do not apply — ask your clinician for a measured or prescribed target. Stop exercising and seek care for chest pain, lightheadedness, or palpitations.

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How to use this calculator

  1. Enter your age. That's all the Standard, Tanaka, and Women formulas need — your fat-burning zone updates instantly as you type.
  2. Pick a method. Standard (220 − age) is the most familiar and what most heart-rate monitors use. Tanaka is a more accurate research-based formula, especially over age 40. Karvonen personalizes your zones using your resting heart rate. Women uses an equation derived specifically from female exercise data.
  3. For Karvonen, add your resting heart rate. Measure it first thing in the morning before getting up. The Karvonen method then factors it in, producing zones tuned to your individual fitness.
  4. Read the three result panels. The big number is your fat-burning zone in beats per minute. The middle panel shows your estimated maximum heart rate and which formula produced it. The third lets you type your live pulse mid-workout to see exactly which zone you're in.
  5. Scan the full five-zone table to see where fat-burning sits relative to your aerobic, anaerobic, and maximum zones — then log your session and export a PDF training log for a coach or clinician.

Why this calculator is different from other fat-burning heart rate tools

Most fat-burning heart rate calculators online ship a single formula (almost always 220 − age), print one number, and stop there. None of them let you compare methods, none show you the full zone ladder, and none let you check your live pulse against your zones. Here's what this tool does differently:

  • Four methods, side-by-side. Standard (220 − age), Tanaka 2001, Karvonen heart-rate reserve, and the Gulati women-specific equation. The comparison row shows your fat-burn range under all four at once — for a 50-year-old that can be a 10–15 bpm spread, which matters when you're trying to stay in the zone.
  • The whole five-zone ladder. Fat-burning is Zone 2, but it only makes sense in context. The tool lays out all five zones (warm-up, fat burn, aerobic, anaerobic, maximum) with your exact bpm ranges, color-coded, with the fat-burn band highlighted.
  • Live heart-rate zone checker. Type your current pulse mid-workout and the tool tells you which zone you're in and whether you're in the fat-burn band — the interactive piece every static calculator is missing.
  • Karvonen personalization. The heart-rate-reserve method factors in your resting heart rate, so a fit person and a sedentary person of the same age get different — and more accurate — zones.
  • Training log + clinician-ready PDF. Save dated sessions with your average heart rate and the zone you reached, then export a one-page PDF for a trainer, cardiac-rehab program, or doctor. Most calculators reset on every refresh.
  • Embeddable widget, free. Trainers, gyms, run clubs, and cardiac-rehab educators can copy a one-line snippet and host the same calculator with attribution baked in.
  • Reviewed by a named clinician. Most heart-rate calculators are anonymous fitness widgets. This one is reviewed by Dr. David Taylor, MD, PhD, with a cited source for every formula.

How this calculator works (the math)

Every heart-rate zone starts from an estimate of your maximum heart rate (HRmax) — the highest your heart can safely beat during all-out effort. Because measuring true HRmax requires a maximal stress test, calculators predict it from your age. The fat-burning zone is then a percentage band of that maximum.

Standard formula (220 − age)

The most widely known equation. Subtract your age from 220 to estimate your maximum heart rate:

  • HRmax = 220 − age

It's simple and good enough for most people, but it was never derived from rigorous research and tends to overestimate HRmax in younger adults and underestimate it in older adults. A 60-year-old's true max is often higher than the 160 bpm this formula predicts.

Tanaka formula (208 − 0.7 × age)

Published in a meta-analysis of 351 studies and validated in a laboratory cohort, the Tanaka equation is more accurate across the age span and is less age-biased than 220 − age:

  • HRmax = 208 − 0.7 × age

Source: Tanaka H, Monahan KD, Seals DR. Age-predicted maximal heart rate revisited. J Am Coll Cardiol 2001;37(1):153–156.

Karvonen / heart-rate reserve

The Karvonen method doesn't change how HRmax is estimated — it changes how the zones are calculated, by factoring in your resting heart rate. First find your heart-rate reserve (HRR), then apply the intensity percentage to it:

  • HRR = HRmax − resting HR
  • Target = (HRR × intensity%) + resting HR

Because a fitter person has a lower resting heart rate and therefore a larger reserve, Karvonen zones are personalized rather than one-size-fits-all. Karvonen zones run higher in bpm than plain percent-of-max zones — that's expected, not an error.

Women-specific formula (206 − 0.88 × age)

The standard equations were derived largely from men. Gulati and colleagues built a women-specific formula from a stress-test study of more than 5,400 women:

  • HRmax = 206 − 0.88 × age

Source: Gulati M, et al. Heart rate response to exercise stress testing in asymptomatic women. Circulation 2010;122:130–137.

The fat-burning zone

Across all four methods, the fat-burning zone is 60–70% of your maximum heart rate — Zone 2 in the five-zone model. At this moderate intensity, your body draws the largest share of its energy from fat rather than carbohydrate. It's a conversational pace: you can talk in short sentences but not sing.

Three real-world examples

A 40-year-old starting steady-state cardio

Using the Standard formula, a 40-year-old has a maximum heart rate of 180 bpm, putting the fat-burning zone at 108–126 bpm. That's a brisk walk on an incline or an easy jog for most people. Holding that band for 30–45 minutes, three or four times a week, is the textbook fat-loss cardio prescription — sustainable, low-injury, and easy to recover from.

A 55-year-old who finds 220 − age too low

At 55, the Standard formula gives a max of 165 bpm and a fat-burn zone of 99–116 bpm — which many active 55-year-olds blow past on an easy effort. Switching to Tanaka raises the estimated max to about 170 bpm and the fat-burn zone to roughly 102–119 bpm. The gap looks small, but over the years 220 − age increasingly underestimates older adults' true max, so Tanaka usually fits better past 50.

A fit 30-year-old woman using Karvonen

A 30-year-old woman with a resting heart rate of 55 bpm has a large heart-rate reserve. With the Women formula her max is about 180 bpm; the plain percent-of-max fat-burn zone is 108–126 bpm. But because her resting heart rate is low, the Karvonen method puts her personalized fat-burn zone higher — around 130–143 bpm — reflecting that a fit heart has more room to work before reaching the same relative intensity. For trained athletes, Karvonen is the more honest target. Pair longer sessions with an electrolyte powder to replace what you sweat out, and a massage gun for recovery between training days.

Fat-burning zone vs. cardio zone: which actually burns more fat?

This is the most misunderstood point in cardio training. In the fat-burning zone (60–70% of max), a larger percentage of the calories you burn comes from fat. But push into the higher aerobic and anaerobic zones and you burn more total calories per minute — and often more total fat — even though the share from fat drops. So which is better?

For most people, the honest answer is: the zone you can actually sustain. The fat-burning zone wins on volume and recovery — you can do it often, for long durations, with minimal injury risk, which adds up to a large weekly calorie burn. Higher-intensity work burns more per minute but you can't do as much of it. The best programs combine both: mostly Zone 2 steady-state for volume, with occasional higher-intensity sessions. Total weekly energy expenditure and a calorie deficit drive fat loss far more than which single zone you train in.

Why your resting heart rate matters

Your resting heart rate is one of the simplest windows into your cardiovascular fitness. A typical adult sits between 60 and 100 bpm; well-trained endurance athletes are often in the 40s or low 50s. As you get fitter, your resting heart rate falls because each beat pumps more blood. That's exactly why the Karvonen method is more personalized — it uses your resting heart rate to size your zones, so improving fitness shifts your targets automatically. To measure it, count your pulse for 60 seconds first thing in the morning before getting out of bed, ideally across several days. A chest-strap or wrist monitor will also report it.

Frequently asked questions

What is the best heart rate to burn fat?

The fat-burning zone is 60–70% of your maximum heart rate — for a 40-year-old using 220 − age, that's about 108–126 bpm. Within that band, the body uses the highest proportion of fat for fuel. But the "best" heart rate for fat loss over time is the one you can sustain often and recover from, because total weekly calorie burn matters more than any single zone.

Is 220 minus age accurate?

It's a reasonable estimate but not precise. The 220 − age formula has a standard deviation of roughly ±10–12 bpm and tends to overestimate maximum heart rate in younger adults and underestimate it in older adults. For people over 40, the Tanaka formula (208 − 0.7 × age) usually fits better. For an exact number, a supervised maximal exercise test is the gold standard.

Should I use the fat-burning zone or higher-intensity intervals?

Both have a place. The fat-burning zone lets you accumulate lots of low-stress training volume that's easy to recover from. Higher-intensity intervals burn more calories per minute and improve cardiovascular fitness faster but are harder to recover from. Most well-designed programs are mostly Zone 2 with a smaller amount of high-intensity work layered in.

Why is my Karvonen zone higher than the percent-of-max zone?

That's expected. The Karvonen method adds your resting heart rate back in after applying the intensity percentage, so its targets sit higher in bpm than a plain percentage of your maximum. Because it accounts for your resting heart rate, it's generally the more individualized of the two approaches — especially for fitter people with a low resting pulse.

Can I embed this calculator on my own site?

Yes — copy the embed snippet at the bottom of this page. The embedded version is a streamlined variant for personal trainers, gyms, run clubs, and cardiac-rehab educators. Required attribution is built in. There's no fee, no signup, and no analytics attached.

Time in the fat-burning zone adds up, and so does the wear on your body. Three recovery categories cover most needs once steady-state cardio becomes a habit. Each links to the full review with current top picks, prices, and pros/cons:

  • Best Massage Guns — percussive recovery for the legs and back between cardio days keeps you consistent, which is what actually drives results.
  • Best Heating Pads — warmth loosens tight muscles before a session and eases post-workout soreness, especially useful for older adults and anyone returning to exercise.
  • Best TENS Units — drug-free relief for the nagging aches that can follow longer or more frequent efforts.

Sources & methodology

  • Tanaka H, Monahan KD, Seals DR. Age-predicted maximal heart rate revisited. J Am Coll Cardiol 2001;37(1):153–156 — Tanaka HRmax formula.
  • Gulati M, Shaw LJ, Thisted RA, et al. Heart rate response to exercise stress testing in asymptomatic women. Circulation 2010;122:130–137 — women-specific HRmax formula.
  • Karvonen MJ, Kentala E, Mustala O. The effects of training on heart rate. Ann Med Exp Biol Fenn 1957;35(3):307–315 — heart-rate reserve method.
  • Centers for Disease Control and Prevention. Target Heart Rate and Estimated Maximum Heart Rate. — moderate-intensity zone guidance.

This tool is reviewed annually for citation currency. About Dr. Taylor · Last reviewed June 11, 2026.

Embed this tool on your site

Free for personal trainers, gyms, run clubs, cardiac-rehab educators, and personal blogs. Required attribution is included in the snippet. No fee, no signup, no analytics attached to the embed. 

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