Workout Calorie Calculator
Calculate calories burned in any type of workout — from yoga and Pilates to HIIT and weight training. Uses MET (Metabolic Equivalent of Task) values for accurate, research-backed calorie estimates based on your weight and workout duration.
Workout Calorie Burn
All Exercises — Your Weight (45 min)
| Exercise | MET | Calories (45 min) | Calories/hr |
|---|
Understanding Workout Calories
The MET formula (Calories = MET × weight in kg × hours) provides standardized calorie estimates across exercise types. MET values represent energy expenditure as a multiple of resting metabolic rate. Light yoga (MET 2.5) burns 2.5× resting rate; HIIT (MET 12+) burns 12× resting rate during activity.
Strength Training and Long-Term Metabolism
While strength training burns fewer calories during the workout compared to cardio, it has powerful long-term metabolic benefits. Building 5 lbs of muscle increases resting metabolic rate by approximately 30–50 calories per day. After 1 year, this adds up to 11,000–18,000 calories burned at rest — equivalent to 3–5 lbs of additional fat loss without extra exercise.
Maximizing Calorie Burn
Combine cardio and strength training for maximum calorie burn: cardio burns more during the session; strength training raises the metabolic baseline. HIIT (high-intensity interval training) provides the best of both — high in-session burn plus significant EPOC (afterburn) lasting 14–48 hours post-workout.
Frequently Asked Questions
Exercise calorie burn is estimated using MET (Metabolic Equivalent of Task) values multiplied by body weight and duration. Each exercise has a standardized MET: weight training ~5.0, moderate cycling ~8.0, running at 6 mph ~9.8. Heavier individuals burn more calories because more energy is needed to move greater mass.
Body weight, fitness level, age, and exercise intensity all influence calorie burn. A 200 lb person burns roughly 40% more calories than a 140 lb person doing the same workout. Highly conditioned athletes are also more efficient — they burn fewer calories for the same effort because their body has adapted.
Most fitness trackers combine MET formulas with heart rate data, improving accuracy somewhat. Research shows smartwatches have calorie burn errors of 20–40% versus lab measurements. Both methods are best used for tracking relative effort and trends, not as precise calorie counts.
No. Sweating is a cooling mechanism, not a measure of calorie burn. You sweat more in humid or hot environments and less in air-conditioned gyms — but calorie burn for the same workout is similar in both conditions. Wearing a sauna suit to sweat more only leads to water weight loss, not additional fat burning.
To lose one pound per week through exercise alone, you need to burn an extra 500 calories per day — which requires roughly 60–90 minutes of vigorous exercise daily for most people. A more realistic and sustainable approach is combining moderate exercise (300–400 calories per session, 3–5 days/week) with modest dietary changes to create the overall deficit. Consistency over months matters more than any single session's calorie count.
The highest MET activities include running at a fast pace (MET 11–16), competitive sports like racquetball and cross-country skiing, jump rope (MET 11–12), HIIT training (MET 8–14), and vigorous cycling (MET 10–12). At 155 lbs, running at 8 mph burns approximately 861 calories per hour. Activities that are sustainable and enjoyable will produce better long-term results than the single highest-burning option.