Project a split
across any distance
Enter a 500m split and any race distance. Get projected total time, average watts, and speed — plus side-by-side projections across every standard erg distance.
Quick answer
total = (split / 500) × distance. A 1:38 split projects to 6:32 over 2K, 16:20 over 5K, 32:40 over 10K. Real pacing has variation, so treat the projection as a flat-pace baseline for setting target splits, not an outcome prediction.
Frequently asked questions
How is the race time predicted?
Linearly: total_time = (split_seconds / 500) × race_distance. A 1:38/500m pace projects to 6:32 over 2,000m, 4:54 over 1,500m, 16:20 over 5,000m. The calculator assumes constant pace — real races have pacing variation, but this is the canonical baseline.
Why is my actual race time different from the projection?
Three reasons: (1) Pacing variation — most rowers start higher, settle, and sprint, giving an average 0.5–1.5% slower than a flat-pace projection. (2) Distance scaling — a fast 500m pace doesn't hold linearly across 6K. Use Test → 2K Equivalent for cross-distance conversions. (3) Conditions — drag-factor differences, rest state, and fueling all shift real outcomes by ±2–5%.
How do I use this for race planning?
Pick the distance you're training for, then sweep the split input to see what time each pace produces. Combine with Pace / Watts to read the wattage demand at each split — important for setting realistic 2K target paces that match your aerobic ceiling.
What are the longest distances rowers race?
Standard erg distances: 500m, 1K, 2K (most common), 5K, 6K (Junior / Lightweight selection), 10K. Head-race distances: typically 4–6K (HOCR is 4,800m). Ultra-distance: half-marathon (21,097m) and marathon (42,195m) are popular Concept2 challenges. The calculator handles all of these via the preset buttons or any custom distance.
Why does the marathon projection at race pace look impossible?
Because it is. Holding 1:38 for a full marathon would require sustaining ~310 W for over two hours — well above any human's critical power. The flat-pace projection is mathematically accurate but physiologically unrealistic for long distances. Use it to spot the gap: at marathon distance you should aim 25–35 seconds slower per 500m than your 2K split.