How Does Concept2 Calculate Calories Burned?

Concept2 rowing machines calculate calories using a weight-adjusted power formula: calories per hour = (4 × watts / 1.1639) + (1.714 × body weight in pounds).

This formula is the industry standard for indoor rowing calorie calculations, providing accurate estimates based on your actual power output.

The Concept2 Calorie Formula Explained

Concept2 uses two primary methods:

Power-Based Calculation

cal/hr = (4 × W / 1.1639) + 1.714 × weight_lb

Where:

W = average power in watts
weight_lb = body weight in pounds

Pace-to-Power Conversion

If using split time:

W = 2.80 / pace³

Where pace = seconds per meter (split time / 500)

Calculate Your Concept2 Calories

Use our Concept2 Calorie Calculator to get accurate estimates using these official formulas.

Sample Calorie Burns at Different Power Outputs

Power (Watts)	60 kg / 132 lbs	70 kg / 154 lbs	80 kg / 176 lbs
100W	570 kcal/hr	608 kcal/hr	645 kcal/hr
150W	742 kcal/hr	780 kcal/hr	817 kcal/hr
200W	914 kcal/hr	951 kcal/hr	989 kcal/hr
250W	1086 kcal/hr	1123 kcal/hr	1160 kcal/hr

Why Concept2 Uses This Formula

The weight-adjusted formula accounts for:

Mechanical work - The actual power produced
Body weight - Heavier individuals burn more calories
Metabolic cost - Energy required beyond mechanical output
Accuracy - Validated through scientific testing

Concept2 vs Other Calorie Estimates

Concept2's formula is generally considered the most accurate for rowing because:

Based on direct power measurement
Accounts for individual body weight
Used by competitive rowers worldwide
Validated through research

Rowing Machine Calorie Calculator - Time/distance based
Rowing Watts Calorie Calculator - Power input
Rowing Split Calorie Calculator - Pace input