Rowing · Concept2 formula

2:25 split: watts, times and calories

A 2:25 /500m split is 115 watts. Held for 2,000 m, that is 9:40.0.

Power
115 W
114.8 W exactly
2,000 m
9:40.0
at 2:25
5,000 m
24:10
at 2:25
Calories / hour
695
monitor (175 lb rower)

Use your own numbers: open the rowing calculator →

The calculation

pace = 145 s ÷ 500 m = 0.2900 s/m · watts = 2.80 ÷ 0.2900³ = 114.8 W

This is Concept2’s formula (watts calculator). Calories use the widely documented monitor formula, 4 × 0.8604 × watts + 300 per hour, which assumes a 175 lb rower — see Concept2’s calorie calculator for the correction for your weight.

Times at 2:25 /500m

DistanceTime
500 m2:25.0
1,000 m4:50.0
2,000 m9:40.0
5,000 m24:10.0
6,000 m29:00.0
10,000 m48:20.0
21,097 m (half marathon)1:41:58.1
42,195 m (marathon)3:23:56.5

Calories by bodyweight

RowerCalories per hourPer 30 minutes
55 kg (121 lb)603301
65 kg (143 lb)641320
75 kg (165 lb)679339
85 kg (187 lb)716358
95 kg (209 lb)754377
105 kg (231 lb)792396

Other splits

Last reviewed: 2026-10-04 · Disclaimer

FAQ

2:25 split — questions

About 115 watts, using Concept2’s formula watts = 2.80 ÷ (split ÷ 500)³.

Holding 2:25 per 500 m for 2,000 m gives 9:40.0.

The Concept2 monitor shows about 695 calories per hour at 115 W, assuming a 175 lb (79 kg) rower. Concept2’s correction: subtract 300 and add 1.714 × your weight in pounds.