Rowing Ergometer Power CalculatorFree online fitness & health calculator — instant results, no sign-up
Convert a Concept2 500-meter split into equivalent ergometer power.
For general information only. This is not medical advice, diagnosis, dosing guidance or a treatment recommendation. Talk to a doctor or other qualified health professional about your health, pregnancy, or diet.
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About the Rowing Ergometer Power Calculator
The Rowing Ergometer Power Calculator converts a Concept2 500-meter split time into equivalent rowing power in watts. Enter the seconds needed to cover 500 meters to see the power associated with that pace under the Concept2 pace–power relationship. With the default split of 120 seconds, the equivalent Concept2 power is 202.55 W.
- Time per 500 m (seconds)
- The time required to row 500 meters on a Concept2 ergometer, entered in seconds, with a default of 120.
Formula and method
P = 2.8 × (500 / t)³; with t = 120 seconds, P = 2.8 × (500 / 120)³ = 202.55 W, rounded to two decimal places.
- PEquivalent Concept2 ergometer power in watts.
- tTime per 500 meters in seconds; must be greater than zero.
- 500The reference split distance in meters.
- 2.8The Concept2 conversion coefficient, yielding watts when 500 / t is expressed in meters per second.
Divide 500 meters by the entered split time to obtain the equivalent speed in meters per second. Cube that speed, multiply by 2.8, and round the result to two decimal places for display in watts.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Time per 500 m120 seconds
Results
- Equivalent Concept2 power202.55 W
How to use the Rowing Ergometer Power Calculator
- 1Find the 500-meter split you want to convert on your Concept2 monitor or workout record.
- 2Express that split in seconds rather than entering minutes and seconds as a decimal.
- 3Enter the value in Time per 500 m (seconds), or retain the default of 120.
- 4Run the calculation to convert the split using P = 2.8 × (500 / t)³.
- 5Read the Equivalent Concept2 power result; the default input gives 202.55 W.
Reading your result
The single output row, Equivalent Concept2 power, shows the watts associated with the entered 500-meter split. For 120 seconds per 500 meters, the result is 202.55 W. A shorter split corresponds to higher power, while a longer split corresponds to lower power; this relationship is cubic, not linear.
Limitations
This tool uses the Concept2 pace–power relationship and should not be assumed to apply to other ergometer brands or to on-water rowing. It does not estimate metabolic energy expenditure, calories burned, or the effort required by a particular person. If the input is an average split from a variable-paced workout, the result is the equivalent steady-pace power, which may differ from the workout's measured average power. Zero and negative split times are invalid, and rounding to two decimal places does not imply that the input or physical performance is equally precise.
Common questions
How do I enter a split shown as 2:00 per 500 meters?+
Enter 120 seconds, the default input. The calculator returns an equivalent Concept2 power of 202.55 W.
Why does a small reduction in my 500-meter split produce a larger proportional increase in watts?+
Power varies with the inverse cube of split time: P = 2.8 × (500 / t)³. Reducing the time increases the equivalent speed, and cubing that speed makes power rise nonlinearly.
Do I need to enter the damper setting or drag factor?+
No. The Concept2 conversion from displayed split to equivalent watts does not require either value. They affect how rowing feels and how you produce power, but they are not additional inputs to this pace–power formula.
Will converting my workout's average split reproduce its average watts exactly?+
Not necessarily. Because the conversion is nonlinear, converting an average split is not generally the same as averaging power throughout a workout with changing pace. Use the monitor's recorded average watts when you need the measured workout average.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
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Results are estimates for informational purposes and are not financial, medical or legal advice.