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Swimming Energy: 2011 MET Model

Estimate swimming-session energy across fourteen historically scoped swim and water-exercise categories.

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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

Recreational backstroke at 4.8 MET, 80 kg and 30 minutes gives 201.6 kcal.

Rate kcal/min = MET × mass kg × 3.5/200; session kcal = rate × minutes.

Worked example

Enter these known values and leave the other values blank.

Swimming style
Backstroke (recreational)
Body weight
80 kg
If you swim for
30 min
You're burning
6.72 kcal / min
... you will burn
201.6 kcal

Assumptions and limitations

  • The dropdown uses the 2011 Adult Compendium, with the medium-speed crawl and moderate water-walking categories identified explicitly. Category values estimate gross energy for adult population models and do not measure individual oxygen use. Water aerobics uses the water-specific 18355 category, distinct from the separate conditioning-exercise category.
  • Clear an unknown before solving an available inverse branch, and lock independent known values when comparing measurements. Use compatible units; a one-way score or lookup does not supply an inverse.

Common questions

What does this result represent?

The dropdown uses the 2011 Adult Compendium, with the medium-speed crawl and moderate water-walking categories identified explicitly. Category values estimate gross energy for adult population models and do not measure individual oxygen use. Water aerobics uses the water-specific 18355 category, distinct from the separate conditioning-exercise category.

Can I work backward from an answer?

Where the captured equation supplies an inverse, clear the unknown and enter independent known values. Rounded scores, one-way outputs and fixed lookup choices do not uniquely recover inputs.

References

Use the published 2011 water-treading MET value 9.8, replacing the captured 9.8001. Zero duration has zero modeled energy; negative durations are invalid.

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