Calories Burned Weight Lifting Calculator

The calculator uses the MET (Metabolic Equivalent of Task) formula: Calories = MET × body weight in kg × duration in hours. Each lifting activity has a scientifically established MET value — for example, general weight lifting is MET 3.5, while vigorous power lifting is MET 6.0. Your body weight and session duration are multiplied against that MET value to estimate total calorie burn.

Yes — weight lifting burns calories both during and after the workout. During the session your muscles consume energy to contract and lift load. After the session, your body continues burning extra calories through EPOC (Excess Post-exercise Oxygen Consumption) as it repairs muscle tissue, sometimes for 24–48 hours. This 'afterburn' effect is one reason strength training is highly effective for long-term fat loss.

At 100 kg, a 45-minute general weight lifting session (MET 3.5) burns approximately 263 calories. Switching to vigorous power lifting (MET 6.0) for the same duration raises that to around 450 calories. Intensity and session length are the biggest levers you can pull to increase your calorie burn.

It depends on your body weight and intensity. A 80 kg person doing vigorous weight lifting (MET 6.0) burns roughly 8 kcal per minute, meaning they'd need about 125 minutes (~2 hours) to reach 1000 calories. High-intensity circuit training or CrossFit (MET 8–9) can reduce that time significantly. Use the calculator to find the exact duration for your specifics.

They provide a reliable estimate, not an exact figure. The MET-based formula is validated by sports science research and used by universities and health organizations worldwide. Individual factors like fitness level, muscle mass, rest periods, and workout pace can cause actual burn to vary by 10–20% from the estimate. For precise tracking, a chest-strap heart rate monitor paired with this calculator gives the best results.

MET stands for Metabolic Equivalent of Task. A MET of 1 equals the energy your body uses at rest (about 1 kcal per kg per hour). Weight lifting activities range from MET 3.0 (light free weights) to MET 9.0 (CrossFit-style lifting). The higher the MET, the more calories you burn per unit of time. Choosing the right MET value for your actual intensity is the most important factor in getting an accurate estimate.

Several strategies increase calorie burn during strength sessions: reduce rest periods between sets (30–60 seconds instead of 2–3 minutes), incorporate compound movements like squats, deadlifts, and bench press that recruit more muscle groups, add supersets or circuit training, and progressively increase the load over time. Higher training intensity directly raises your MET value and extends the EPOC afterburn effect.

Steady-state cardio (like jogging at MET ~7) typically burns more calories per minute during the session than moderate weight lifting (MET 3.5). However, weight lifting builds muscle mass, which raises your resting metabolic rate and means you burn more calories all day — even at rest. A combination of both is the most effective strategy for body composition and long-term calorie management.