Rowing Split Calculator
Speak erg fluently: convert between your split per 500 meters, watts, and a projected 2k time using the exact Concept2 relationship.
Concept2 ergs relate pace and power with a fixed formula: watts equal 2.80 divided by the cube of your pace in seconds per meter. A 2:00/500m split works out to about 200 watts. The 2k projection assumes you hold that exact pace the whole way — real races usually start and finish faster than the middle.
How it works
Concept2 ergs tie pace and power together with one clean equation: watts equal 2.80 divided by the cube of your pace, where pace is measured in seconds per meter. That's why halving your split takes eight times the power, not twice.
Enter a split per 500 meters and we'll cube the pace to find watts. Or enter watts and we invert the formula to recover the split. Either way you get both numbers, so you can train to whichever your screen shows.
We also project a 2k time by holding that pace across two kilometers, and give a rough calories-per-hour figure using Concept2's own estimate. The 2k is a flat projection — real efforts start and finish faster than the middle.
Frequently asked questions
Does a 2:00 split really equal 200 watts?
Almost exactly — the formula gives about 202 watts for a 2:00/500m split. It's a handy checkpoint to sanity-check the tool and your own erg's readout.
Why is the 2k time just a projection?
It assumes you hold one steady pace for the whole distance. Actual 2k tests usually involve a faster start, a settle in the middle, and a sprint finish, so your real time depends on how you pace it.
Are the calories accurate?
They're a rough estimate using Concept2's public formula, which doesn't know your bodyweight or efficiency. Use the number to compare your own sessions, not as a precise burn count.