Walking Calorie & kJ Calculator
Calculate how many kilojoules or calories you burn walking, based on your body weight, speed, duration, incline, and surface type. This Australian calculator uses MET values from the Compendium of Physical Activities and shows results in both kJ and kcal.
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How It Works
Walking energy is calculated using MET values that vary by speed, gradient, and surface. Flat-ground METs range from 2.8 (slow stroll at 3.2 km/h) to 5.0 (power walk at 6.4 km/h). Uphill walking increases the MET by 30-105%, and soft surfaces like sand add roughly 50% more effort. The formula: Energy (kJ) = MET x weight (kg) x hours x 4.184.
Quick Reference
| Duration | kJ Burned | Calories Burned |
|---|---|---|
| 10 min | 219 | 52 |
| 15 min | 329 | 79 |
| 20 min | 439 | 105 |
| 30 min | 658 | 157 |
| 45 min | 987 | 236 |
| 60 min | 1,317 | 315 |
| 90 min | 1,975 | 472 |
Based on 75 kg at moderate pace (4.8 km/h, MET 3.5) on flat ground.
How This Is Calculated
- MET
- = Metabolic Equivalent of Task (2.8-5.0 for walking, adjusted for gradient and surface)
- weight
- = body weight in kilograms
- duration
- = exercise time in hours
Flat-ground MET values: 3.2 km/h = 2.8, 4.0 km/h = 3.0, 4.8 km/h = 3.5, 5.6 km/h = 4.3, 6.4 km/h = 5.0. Uphill grades increase the MET by 30-105%. Sand increases MET by ~50%. From the Compendium of Physical Activities.
kJ Burned Walking for 30 Minutes (by Weight and Speed)
This table shows the kilojoules burned during a 30-minute walk on flat ground at different body weights and walking speeds. Heavier individuals burn more energy because it takes more effort to move a larger body mass.
| Weight | 3.2 km/h | 4 km/h | 4.8 km/h | 5.6 km/h | 6.4 km/h |
|---|---|---|---|---|---|
| 55 kg | 322 kJ | 345 kJ | 403 kJ | 495 kJ | 575 kJ |
| 65 kg | 381 kJ | 408 kJ | 476 kJ | 585 kJ | 680 kJ |
| 75 kg | 439 kJ | 471 kJ | 549 kJ | 675 kJ | 785 kJ |
| 85 kg | 498 kJ | 533 kJ | 622 kJ | 765 kJ | 889 kJ |
| 95 kg | 556 kJ | 596 kJ | 696 kJ | 855 kJ | 994 kJ |
| 105 kg | 615 kJ | 659 kJ | 769 kJ | 945 kJ | 1,098 kJ |
Flat ground, pavement surface. Multiply by 1.3-2.0 for uphill walking.
Calories and kJ Burned per Kilometre Walking
A common rule of thumb is approximately 1 kcal per kg of body weight per kilometre walked. The table below shows more precise values calculated using MET values at moderate pace (4.8 km/h). Walking faster burns slightly more energy per kilometre because your muscles work harder, even though you cover the distance sooner.
| Weight | kJ per km | kcal per km |
|---|---|---|
| 55 kg | 168 kJ | 40 kcal |
| 65 kg | 198 kJ | 47 kcal |
| 75 kg | 229 kJ | 55 kcal |
| 85 kg | 259 kJ | 62 kcal |
| 95 kg | 290 kJ | 69 kcal |
| 105 kg | 320 kJ | 76 kcal |
Based on moderate pace (4.8 km/h, MET 3.5) on flat pavement.
How Many Kilojoules Does Walking Burn?
Walking burns between 400 and 1,400 kJ per 30 minutes depending on your weight, speed, and terrain. A 70 kg person walking at a moderate pace of 4.8 km/h on flat ground burns approximately 615 kJ (147 kcal) in 30 minutes. At a brisk pace of 5.6 km/h, that increases to around 755 kJ (180 kcal).
For a heavier person (95 kg), the same 30-minute moderate walk burns roughly 835 kJ (200 kcal), while a lighter person (55 kg) burns about 485 kJ (116 kcal). Body weight is the single biggest factor in how many kilojoules you burn walking.
Walking uphill dramatically increases energy expenditure. A 5% incline adds roughly 50% more kJ burned compared to flat ground at the same speed. Walking on sand also increases the effort by around 50% compared to pavement.
How Many Calories Does Walking 10,000 Steps Burn?
Walking 10,000 steps covers roughly 7-8 km depending on your stride length. For a 70 kg person at moderate pace, 10,000 steps burns approximately 1,400-1,650 kJ (335-395 kcal). For a 90 kg person, the same 10,000 steps burns around 1,800-2,100 kJ (430-500 kcal).
The exact number depends on walking speed, terrain, and individual biomechanics. Faster walking increases the energy cost per step, and uphill or uneven surfaces add significantly more effort. However, even a slow 10,000-step walk provides meaningful energy expenditure for weight management.
Walking for Weight Loss: How Much Is Enough?
Walking is one of the most effective and sustainable forms of exercise for weight management. The Australian Department of Health recommends at least 150 minutes of moderate-intensity physical activity per week, which translates to roughly 30 minutes of brisk walking five days a week.
For a 75 kg person, five 30-minute brisk walks per week burns approximately 3,760 kJ (900 kcal). Over a month, that adds up to about 15,040 kJ, which equates to roughly half a kilogram of body fat. Combined with a modest dietary adjustment of 1,000-2,000 kJ per day, this creates a sustainable rate of weight loss of 0.5-1 kg per week.
Consistency matters more than intensity. A daily 30-minute walk you maintain for a year will deliver far better results than intense exercise you abandon after a few weeks. Walking is low-impact, requires no equipment, and can be built into daily routines through commuting, lunchtime walks, or evening strolls.
Does Walking Speed Affect Calories Burned?
Yes. Walking speed has a direct impact on energy expenditure. At 3.2 km/h (a slow stroll), the MET value is 2.8. At 5.6 km/h (brisk walking), it rises to 4.3 - a 54% increase in energy cost per minute. At 6.4 km/h (power walking), the MET reaches 5.0, nearly double the energy cost of a slow stroll.
The difference adds up quickly. A 75 kg person walking for 30 minutes burns 440 kJ at a slow pace versus 676 kJ at a brisk pace. Over a week of daily walks, that is an extra 1,650 kJ - the equivalent of a small meal.
Frequently Asked Questions
- How many kilojoules does walking 5 km burn?
- A 70 kg person walking 5 km at moderate pace (4.8 km/h) on flat ground burns approximately 1,050 kJ (250 calories). A heavier person (90 kg) burns around 1,350 kJ for the same walk. Walking the same distance uphill at a 5% grade increases the burn to roughly 1,575 kJ.
- Is walking good for weight loss?
- Yes, walking is an excellent low-impact exercise for weight loss. A daily 30-minute brisk walk burns around 600-800 kJ. The Australian Department of Health recommends at least 150 minutes of moderate activity per week. Combined with a slight dietary deficit, regular walking can lead to steady, sustainable weight loss of 0.5-1 kg per week.
- How many calories per km walking?
- A general rule of thumb is approximately 1 kcal per kg of body weight per km walked on flat ground. A 70 kg person burns about 70 kcal (293 kJ) per kilometre, while a 90 kg person burns about 90 kcal (377 kJ). This increases significantly on hills or soft surfaces like sand.
- How many kJ does walking 10,000 steps burn?
- Walking 10,000 steps covers roughly 7-8 km. For a 70 kg person at moderate pace, this burns approximately 1,400-1,650 kJ (335-395 kcal). For a 90 kg person, the same 10,000 steps burns around 1,800-2,100 kJ (430-500 kcal).
- How many calories do you burn walking for 30 minutes?
- A 30-minute walk at moderate pace (4.8 km/h) burns approximately 105-210 kcal (440-880 kJ) depending on body weight. A 60 kg person burns about 105 kcal, a 75 kg person burns about 130 kcal, and a 95 kg person burns about 165 kcal. Brisk walking (5.6 km/h) increases these numbers by roughly 20%.
- How many calories do you burn walking for 60 minutes?
- An hour of moderate walking (4.8 km/h) burns approximately 210-420 kcal (880-1,760 kJ) depending on your weight. A 70 kg person burns about 245 kcal, while a 90 kg person burns about 315 kcal. You will cover roughly 4.8 km and take about 6,800 steps.
- Does walking speed affect calories burned?
- Yes, significantly. At 3.2 km/h (slow stroll), the MET is 2.8. At 5.6 km/h (brisk walk), it jumps to 4.3, a 54% increase in energy cost per minute. For a 75 kg person walking 30 minutes, this is the difference between 440 kJ and 676 kJ.
- Is brisk walking better than slow walking for weight loss?
- Brisk walking burns more kilojoules per minute and provides greater cardiovascular benefits. However, slow walking is still effective and may be more sustainable for beginners or those with joint issues. The best walking speed for weight loss is one you can maintain consistently.
- How many km should I walk a day to lose weight?
- Walking 4-6 km per day (roughly 5,000-8,000 steps) creates a meaningful energy deficit when combined with a balanced diet. For a 75 kg person, this burns 1,000-1,500 kJ. The key is consistency: a daily habit of moderate walking produces better long-term results than occasional intense sessions.
- How many kilojoules does a 5 km walk burn?
- A 5 km walk takes about 60 minutes at moderate pace and burns approximately 880 kJ (210 kcal) for a 60 kg person, 1,050 kJ (250 kcal) for a 70 kg person, and 1,320 kJ (315 kcal) for an 90 kg person. Walking the same distance on sand or uphill burns 30-50% more.
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