High-Intensity Interval Training (HIIT) has become one of the most popular workout styles for those seeking maximum calorie burn in minimal time. A typical 20-minute HIIT session can torch anywhere from 150 to 400 calories depending on your body weight, exercise selection, and intensity. This article provides a detailed HIIT calories burned calculator for a 20-minute workout, explains the underlying MET (Metabolic Equivalent of Task) values, and compares HIIT to steady-state cardio. Understanding these numbers can help you better plan your fitness routine and achieve your weight management goals.
Calorie burn during exercise depends on several factors: your weight, the intensity of the activity, and the duration. For HIIT, the afterburn effect—excess post-exercise oxygen consumption (EPOC)—also contributes to additional calorie expenditure post-workout. We'll break down how to estimate your burn using a simple formula and provide real-world examples. For a deeper dive into how MET values work, see our complete guide to calorie burn and MET values.
How Many Calories Does a 20-Minute HIIT Workout Burn?
The number of calories burned in a 20-minute HIIT session varies widely. Here are estimates for a person weighing 155 lb (70.3 kg):
- Low-intensity HIIT (e.g., bodyweight circuits with short rest): ~180–220 calories
- Moderate-intensity HIIT (e.g., sprint intervals on a bike): ~240–300 calories
- High-intensity HIIT (e.g., burpees, jump squats, battle ropes): ~300–400 calories
These numbers assume a vigorous effort. Lighter individuals will burn fewer calories, while heavier individuals burn more. For example, a 125 lb (56.7 kg) person doing the same high-intensity workout might burn about 240–320 calories, whereas a 185 lb (83.9 kg) person could burn 360–480 calories.
To calculate your own estimate, you can use the MET formula: Calories burned per minute = (MET × body weight in kg) / 200. For HIIT, MET values typically range from 6 (moderate) to 10 or higher (very vigorous). A 20-minute session at MET 8 for a 70 kg person yields: (8 × 70) / 200 = 2.8 cal/min × 20 = 56 calories? That seems too low—because the formula above is actually for calories per minute, but it's often misapplied. The correct formula is: Calories = MET × weight (kg) × duration (hours). For 20 minutes (0.333 hours): 8 × 70 × 0.333 = 186.5 calories. That aligns with the estimates above. So a MET of 8 gives about 186 cal for a 70 kg person in 20 minutes.
Understanding MET Values for HIIT
MET (Metabolic Equivalent of Task) is a unit that estimates the energy cost of physical activities. One MET is the energy expended at rest. HIIT workouts are not a single activity in the MET compendium; instead, they are composed of various exercises. However, the Compendium of Physical Activities provides MET values for similar activities:
- Circuit training (including some aerobic movement with rest periods): MET 8.0
- Calisthenics (e.g., pushups, situps, pullups, jumping jacks), vigorous effort: MET 8.0
- Jumping rope (moderate pace): MET 8.8
- Running (6 mph / 9.7 kph): MET 9.8
- Stationary cycling (vigorous effort): MET 8.5
For a typical HIIT workout that alternates between high-intensity bursts (e.g., sprinting, burpees) and active recovery, the average MET often falls between 8 and 10. A study published in the Journal of Strength and Conditioning Research found that a 20-minute HIIT session (Tabata protocol) burned about 240–360 calories for men and 180–280 for women, depending on body weight. Another study in Medicine & Science in Sports & Exercise reported that HIIT can increase EPOC by 6–15% of total energy expenditure, meaning you continue burning calories for hours after the workout.
For more on how MET values apply to different exercises, read our calories burned running calculator and calories burned cycling calculator articles.
HIIT vs Steady-State Cardio: Which Burns More?
A common question is whether HIIT or steady-state cardio (e.g., jogging, cycling at a constant pace) burns more calories per minute. For the same duration, HIIT typically burns more calories during the workout and has a higher afterburn effect. However, steady-state cardio can be sustained longer, so total calorie burn over a longer period may be higher.
Here's a comparison for a 155 lb (70 kg) person:
| Activity | Duration | Calories Burned (approx.) |
|---|---|---|
| HIIT (vigorous) | 20 min | 280–350 |
| Jogging (5 mph / 8 kph) | 20 min | ~180 |
| Cycling (moderate, 12-14 mph) | 20 min | ~210 |
| Walking (3.5 mph) | 20 min | ~70 |
As shown, HIIT can burn about 1.5 to 2 times more calories than steady-state cardio in the same time frame. But if you can jog for 40 minutes, you might burn 360 calories, which is comparable to a 20-minute HIIT session. However, HIIT also offers benefits like improved insulin sensitivity and cardiovascular fitness with less time commitment.
For a deeper comparison, check out our article on running vs jogging calorie burn and treadmill vs outdoor calorie burn.
Sample 20-Minute HIIT Workout and Calorie Estimates
Here is a sample HIIT workout you can do at home or in a gym. The estimated calorie burn is for a 155 lb person using an average MET of 8.5.
- Warm-up (3 minutes): Jumping jacks, high knees, arm circles.
- Interval 1 (4 minutes): 20 seconds burpees, 10 seconds rest. Repeat 8 times.
- Interval 2 (4 minutes): 30 seconds mountain climbers, 15 seconds rest. Repeat 5 times.
- Interval 3 (4 minutes): 20 seconds squat jumps, 10 seconds rest. Repeat 8 times.
- Interval 4 (4 minutes): 30 seconds plank jacks, 15 seconds rest. Repeat 5 times.
- Cool-down (1 minute): Stretching.
Total time: 20 minutes. Estimated calorie burn: ~280–330 calories. If you increase intensity (e.g., add weights or explosive movements), you can push toward 400 calories.
Factors That Affect Calorie Burn in HIIT
Several factors influence how many calories you actually burn during a 20-minute HIIT session:
- Body weight: Heavier individuals burn more calories because they require more energy to move. For every 10 lb (4.5 kg) increase, calorie burn rises by about 5–10%.
- Intensity: The harder you push during work intervals, the higher the calorie burn. Using a heart rate monitor can help you stay in the target zone (80–95% of max HR).
- Work-to-rest ratio: Shorter rest periods (e.g., 1:1 or 2:1) increase total energy expenditure compared to longer rests (e.g., 1:3).
- Exercise selection: Compound, full-body movements (burpees, squat jumps, battle ropes) burn more calories than isolation exercises (bicep curls).
- Afterburn (EPOC): HIIT can elevate your metabolism for up to 24 hours post-workout, adding an extra 50–100 calories burned.
To maximize EPOC, include exercises that recruit large muscle groups and maintain high intensity. Also, consider adding resistance training elements—see our article on walking uphill for insights on incline work.
Using a HIIT Calories Burned Calculator
Online calculators can provide estimates, but you can also do the math yourself. Here's a simple formula:
Calories burned = MET × weight (kg) × time (hours)
For a 20-minute (0.333 hour) HIIT workout at MET 8.5 for a 70 kg person: 8.5 × 70 × 0.333 = 198 calories. But remember, this is an average; actual MET may vary. For more precise tracking, use a heart rate monitor or fitness tracker that estimates calorie burn based on heart rate.
Many popular fitness trackers like Fitbit, Apple Watch, and Garmin use heart rate data to estimate calorie burn during HIIT. However, studies show these devices can overestimate by 20–30%. For weight loss purposes, use these numbers as a guide and adjust your calorie intake accordingly.
If you're interested in other activities, check our calories burned swimming calculator and mountain biking calories burned articles.
Practical Tips to Maximize Calorie Burn in 20 Minutes
- Choose compound movements: Burpees, squat jumps, thrusters, and kettlebell swings engage multiple muscle groups and increase heart rate quickly.
- Minimize rest: Aim for a work-to-rest ratio of at least 1:1 (e.g., 30 seconds work, 30 seconds rest) or even 2:1 (e.g., 40 seconds work, 20 seconds rest).
- Increase intensity gradually: Use a timer and push yourself to complete as many reps as possible (AMRAP) during work intervals.
- Add weights or resistance: Holding dumbbells or wearing a weighted vest can increase calorie burn by 10–20%.
- Stay consistent: HIIT is taxing; limit to 3–4 times per week to allow recovery.
Remember, nutrition plays a key role in weight management. A 20-minute HIIT session can burn 300 calories, but that can be negated by a single slice of pizza. Combine HIIT with a balanced diet for best results.
Conclusion
A 20-minute HIIT workout is an efficient way to burn calories, with estimates ranging from 150 to 400 calories depending on your weight and intensity. Using MET values and the formula provided, you can calculate your own expected burn. While HIIT burns more per minute than steady-state cardio, both have their place in a fitness routine. The afterburn effect is a bonus, but don't rely solely on it for weight loss—track your overall energy balance. For more detailed information on calorie burn for various activities, explore our related articles below.