How to Set Rowing Splits: A Practical Guide for Every Training Zone
Knowing what split to hold is one of the most important — and most asked — questions in erg training. This guide walks you through calculating target splits for every training zone from a single benchmark.
What splits are and why they matter
Your split is the time it would take you to row 500 metres at your current pace. It's displayed as /500m on the monitor. Splits let you compare effort across different workout durations and distances, making them the universal currency of erg training.
Without target splits, every session becomes guesswork. With them, you know exactly whether you're training in the right zone.
Step 1: establish a 2K benchmark
Everything starts from your 2K erg score. It doesn't need to be a maximal race effort — a hard, honest test where you gave your best is enough.
If you haven't done a 2K recently:
- Go all-out for 2,000 metres after a thorough warm-up
- Record your average split (not your best split — the average)
- See the 2K Erg Training Guide for test-day tips
If you don't have a 2K but you have a 6K or 60-minute score, you can estimate your 2K. As a rough guide:
- 2K split ≈ 6K split − about 8 seconds (Paul's Law: about 5 seconds per 500m slower each time the distance doubles, which works out at about 7.9 seconds from 2K to 6K)
- 2K split ≈ 60-minute split − 15–20 seconds
These are approximations — an actual 2K test is always better. ErgBuddy uses a slightly smaller bridge: if you have a 2K but no 6K, it estimates a 6K Anchor as your 2K split plus 7 seconds and labels it as an estimate.
Step 2: calculate zone splits
From your 2K average split, add seconds to get each training zone:
| Zone | Name | Add to 2K split | Example (2K = 1:50) |
|---|---|---|---|
| UT2 | Steady-state | +20–26 sec | 2:10–2:16 |
| UT1 | Moderate aerobic | +14–18 sec | 2:04–2:08 |
| AT | Anaerobic threshold | +8–12 sec | 1:58–2:02 |
| TR | Transport | +4–6 sec | 1:54–1:56 |
| AN | Anaerobic | +0–3 sec | 1:50–1:53 |
| Max | Sprint | Faster than 2K | Under 1:50 |
These offsets are widely used in rowing programmes and align with the zones explained in Rowing Pace Zones.
Step 3: adjust for distance and duration
Your target split for a specific workout depends on the interval length:
| Interval length | Zone | Guideline |
|---|---|---|
| 500m or less | AN–Max | At or faster than 2K pace |
| 1,000m | TR–AN | 2K +2–5 sec |
| 2,000m | AT–TR | 2K +6–10 sec |
| 5,000–6,000m | UT1–AT | 2K +12–18 sec |
| 10,000m+ | UT2–UT1 | 2K +18–24 sec |
| 30–60 min continuous | UT2 | 2K +20–26 sec |
Longer pieces demand slower splits. Trying to hold 2K pace for a 10K will end badly.
Quick reference table
Here's a ready-made lookup for common 2K scores:
| 2K pace | UT2 range | UT1 range | AT range |
|---|---|---|---|
| 1:40 | 2:00–2:06 | 1:54–1:58 | 1:48–1:52 |
| 1:45 | 2:05–2:11 | 1:59–2:03 | 1:53–1:57 |
| 1:50 | 2:10–2:16 | 2:04–2:08 | 1:58–2:02 |
| 1:55 | 2:15–2:21 | 2:09–2:13 | 2:03–2:07 |
| 2:00 | 2:20–2:26 | 2:14–2:18 | 2:08–2:12 |
| 2:05 | 2:25–2:31 | 2:19–2:23 | 2:13–2:17 |
| 2:10 | 2:30–2:36 | 2:24–2:28 | 2:18–2:22 |
| 2:15 | 2:35–2:41 | 2:29–2:33 | 2:23–2:27 |
| 2:20 | 2:40–2:46 | 2:34–2:38 | 2:28–2:32 |
Watts vs splits: when to use which
Splits and watts measure the same thing — power output — but on different scales. Watts scale linearly with effort, while splits don't: dropping from 2:00 to 1:55 requires significantly more power than dropping from 2:10 to 2:05.
Use splits for: day-to-day training, setting targets, pacing races. They're intuitive and directly readable on the monitor.
Use watts for: comparing across body weights, tracking progress over time, understanding the actual effort difference between zones. The watts calculator converts between splits and watts instantly.
Rate and split relationship
A common misconception: lower rate means slower split. Not necessarily.
At lower rates (18–20 spm), each stroke must produce more power to maintain the same split. This means:
- A 2:05 at rate 18 requires more force per stroke than a 2:05 at rate 24
- The cardiovascular demand may be similar, but the muscular demand differs
- Training at lower rates develops leg drive and body swing
For steady-state, rate 18–22 is standard. For threshold and above, rate 26–32 is typical. See UT2 vs UT1 vs Threshold for more detail.
Weight adjustment
Heavier rowers generally produce faster splits at the same fitness level because the erg doesn't account for body weight. To compare fairly across body weights, use weight-adjusted pace:
The standard formula adjusts to a reference weight (usually 75kg for men, 61.36kg for women):
Adjusted split = Actual split × (Actual weight / Reference weight) ^ 0.222
The weight adjustment calculator handles this automatically. Enter your split and body weight to see your adjusted score.
How ErgBuddy auto-calculates zones
Log a benchmark in ErgBuddy and it works out all six training zones from your Anchor (the test that matches your goal, or an estimate from another distance) and shows them on the Zones screen. It uses one Anchor at a time rather than blending tests.
Each session in your plan comes with its own target split range and stroke rate worked out from the Anchor when the plan is created, so there's no manual lookup. When your Anchor changes, your zones update with it. Pace targets in a plan you've already started stay as set, so start a fresh block to pick up the new paces.
Use the pace calculator to quickly calculate zones from any benchmark right now.
Further reading
- Rowing Pace Zones Explained — the full 6-zone breakdown
- 2K Erg Training Guide — how to test and train for the 2K
- Steady-State Rowing — getting the most from your UT2 sessions
- UT2 vs UT1 vs Threshold Rowing — understanding training intensities