Weighted Vest Calorie Calculator

How the calculator works

The calculator combines two published equations into one estimate:

1. Walking without a vest: the ACSM walking equation estimates oxygen use from speed and incline and converts it to calories (about 5 kcal per liter of oxygen). It is designed for walking speeds of roughly 1.9 to 3.7 mph, so the calculator only accepts that range [1].
2. The extra cost of the vest: a validated US Army model from Looney and colleagues (2024) describes how much a vest raises the net cost of walking, depending on vest weight relative to body weight. Its estimates were within about 10% of measured values in the validation data [2].

We apply the vest term from the second model to the net walking cost from the first. Combining the two is our own approach, so treat the result as a rough estimate, not a measurement. Results include your resting burn.

How many extra calories does a weighted vest burn?

Fewer than marketing suggests. On level ground, the Looney equation puts the extra net walking cost at about 4% for a vest that weighs 5% of your body weight and about 8.5% at 10% [2]. In calories, that is often only 5 to 15 extra per half hour. Claims that a vest makes you burn “three times more calories” are not supported [3].

What raises the total more:

• Incline: with the same 170 lb person and 15 lb vest, a 5% incline raises the 30-minute estimate from about 140 to about 230 kcal.
• Time and pace: walking 60 minutes at 3.5 mph instead of 30 minutes at 3 mph roughly doubles the total.

For a table by body weight and vest weight, see weighted vests for weight loss.

Will a vest help me lose weight?

Only a little. In studies, adding a vest to exercise led to a small extra loss of fat mass (about 0.7 kg in a meta-analysis) [4], and a short trial with a heavy vest worn about 8 hours a day reduced body weight by about 1.3 kg more than a light vest over three weeks [5]. Weight loss still depends mostly on overall diet and activity.

How heavy should my vest be?

Start light. Our house guidance starts at about 5% of body weight (3% if you are new to exercise or 65+) and keeps walking loads at or below 10% – up to 15% only for healthy, trained adults. The calculator warns you when a vest is above those levels. Use the weight calculator to find your starting weight.

Limits of this estimate

• Calorie needs differ between people with the same weight – by fitness, body composition, walking technique and terrain.
• The equations were developed for walking, not running, stairs or workouts. We do not recommend running with a vest by default.
• Fitness trackers use their own formulas and may show different numbers.
• If you have a health condition, ask your clinician before adding weight (see our medical disclaimer).

Sources

1. American College of Sports Medicine. ACSM’s Guidelines for Exercise Testing and Prescription, 12th ed. – metabolic equation for walking.
2. Looney DP, Lavoie EM, Notley SR, et al. (2024). Metabolic Costs of Walking with Weighted Vests. Med Sci Sports Exerc.
3. Cleveland Clinic Health Essentials (2024). Should You Add Rucking to Your Workouts? (expert: Matthew Kampert, DO, sports medicine).
4. Wang X, Zhou L, Shi T, et al. (2026). Effects of weighted vest on bone health and body fat in middle-aged and older adults: a systematic review and meta-analysis. Osteoporosis International.
5. Ohlsson C, Gidestrand E, Bellman J, et al. (2020). Increased weight loading reduces body weight and body fat in obese subjects – A proof of concept randomized clinical trial. EClinicalMedicine.