How many calories does scuba diving burn per hour?

For a 70 kg person, recreational scuba diving (6.8 METs) burns approximately 500 calories per hour in warm, calm water. In cold water with strong currents, this can increase to approximately 676 calories per hour due to thermal and propulsion demands.

Does cold water increase calorie burn?

Yes. The body expends additional energy to maintain core temperature in cold water. This calculator applies a 7% increase for temperate water (18-24°C) and a 15% increase for cold water (below 18°C).

How does scuba diving compare to swimming?

Recreational scuba diving (6.8 METs) is similar in intensity to moderate swimming (5.8 METs), but factors like buoyancy management, equipment drag, and depth make diving a unique physical demand.

Should I include surface intervals in the duration?

No. Enter only time spent in the water (descent, bottom time, and ascent). Surface intervals do not involve the same energy expenditure and should be excluded.

Scuba Diving Calorie Calculator

Name: Scuba Diving Calorie Calculator
Author: Manish Kumar

Estimating Calories Burned While Scuba Diving

Scuba diving combines swimming, finning, buoyancy management, and equipment handling, making it a moderate-to-vigorous physical activity. Energy expenditure varies based on dive type, water conditions, and environmental factors like temperature and current.

This calculator uses MET values from the 2024 Compendium of Physical Activities, which includes specific codes for different scuba diving intensities (codes 18200–18210).

Understanding Dive Type METs

Snorkeling (5.0 METs): Surface-level activity with mask and fins, no tank
Light Effort (5.3 METs): Drift diving in calm water with minimal finning
Moderate Effort (5.8 METs): Navigating reef with regular fin strokes
Recreational (6.8 METs): Active exploration diving, typical recreational dive
General Scuba (7.0 METs): General-purpose scuba or skin diving

For general MET calculations, see our MET Calculator.

Environmental Adjustments

Two key environmental factors affect energy expenditure during diving:

Water Temperature: Cold water increases metabolic demand as the body works to maintain core temperature. Temperate water adds ~7% and cold water adds ~15% to the baseline energy expenditure.
Current Strength: Swimming against a current requires significantly more effort. Mild currents add ~8% and strong currents add ~18% to energy expenditure.

How to Use This Calculator

Select your unit system and enter your body weight
Choose the dive type that best matches your typical dive
Enter total dive duration (bottom time + descent/ascent)
Select water temperature and current conditions
Review adjusted MET value, calories, and comparison to swimming

Frequently Asked Questions

Sources & References

2024 Compendium of Physical Activities — Water Activities (Codes 18200-18210). Ainsworth BE et al.. PA Compendium (2024)
Exercise Intensity and Energy Expenditure Classification. Multiple authors. PMC (2019)
Metabolic Equivalent Concepts in Exercise Science. Multiple authors. ScienceDirect (2016)

Disclaimer: This tool is for informational and personal journaling purposes only. Results are estimates based on published formulas and may vary based on individual factors such as genetics, training history, and measurement technique.

Manish KumarNASM-CPTCertified Sports Nutritionist

Certified Personal Trainer & Sports Nutritionist

Fitness professional with 10+ years of experience in personal training, sports nutrition, and fitness technology.