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Rowing Watts Calculator

Work out rowing watts instantly with clear inputs, formula shown and shareable results.

About Rowing Watts Calculator

The Concept2 power relation converts a 500 m split into watts: 2.80 divided by the cube of seconds per metre. A 1:50 split is 0.22 s per metre, giving about 263 W. Rowers usually burn about four times their mechanical power in metabolic terms, so that is roughly 905 kcal an hour.

Formulas

Concept2 power

watts = 2.80 / (split seconds / 500)^3

Energy cost

kcal/h = watts x 4 x 3600 / 4184

Worked example

With the default values below, Rowing Watts Calculator returns Power Output of 263.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

500 m split minutesminimum 0 min
1 min
500 m split secondsaccepts 0–59.9 s
50 s
Body weightminimum 1 kg
80 kg

Results

Power Output
263.0 W
Power To Weight
3.287 W/kg
Energy Expenditure
905 kcal/h
Pace
0.2200 s/m

Step by step

  1. 1Values used
  2. 2Concept2 power
  3. 3Energy cost
  4. 4Power Output= 263.0 W
  5. 5Power To Weight= 3.287 W/kg
  6. 6Energy Expenditure= 905 kcal/h
  7. 7Pace= 0.2200 s/m

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.

Frequently Asked Questions

Why does the ergometer show a different calorie figure?

Concept2 adds a fixed resting allowance of about 300 kcal an hour, so its display exceeds the exercise-only figure.

Does the damper setting change the watts?

No. Power is measured from flywheel deceleration, so the same effort gives the same watts at any drag factor - only the stroke feel changes.

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