Estimate the rider’s gross and active energy expenditure from body weight, riding activity, and time.
Horseback Riding Calorie Formula
Gross kcal = MET × 3.5 × rider weight (kg) ÷ 200 × minutes
Choose a Matching Riding Activity
The activity list uses the 2024 Adult Compendium of Physical Activities: general riding 5.5 MET, walking 3.8, trotting 5.8, canter or gallop 7.3, jumping 9.0, and reining 6.0. Select the activity that best describes the time you are entering. General riding is its own published category, not the arithmetic average of the other choices.
Use the Rider’s Body Weight
This calculation estimates human energy expenditure. Enter the rider’s body weight, excluding the horse, saddle, and equipment. Kilograms and pounds are selectable beside the weight field. Pounds are converted using 1 lb = 0.45359237 kg. The horse’s weight and the combined rider-and-tack load belong in different calculations and should not be substituted for human body weight here.
Gross Versus Active Energy
Gross energy includes the resting energy associated with the same period. The active estimate subtracts a standard 1-MET allowance: (MET − 1) × 3.5 × kilograms ÷ 200 × minutes. Both numbers describe the same session with different baselines. A watch or activity app may report either baseline, so compare like with like when reviewing estimates. Neither output is a direct measurement of the rider’s metabolism.
Worked Example
For a 70 kg rider doing general riding at 5.5 MET for 60 minutes, the rate is 5.5 × 3.5 × 70 ÷ 200 = 6.7375 kcal per minute. Multiplying by 60 gives 404.25 gross kcal. The standard resting allowance is 73.50 kcal, leaving 330.75 active kcal above that allowance. Rounding the per-minute rate first may produce a slightly different reconstructed total.
Estimating Time from a Calorie Amount
Select the time result to rearrange the same relationship. Minutes = gross kcal ÷ gross kcal per minute. At the example rate of 6.7375 kcal/min, 404.25 gross kcal corresponds to 60 minutes. This is a model comparison, not a recommended exercise duration. The calorie input in this mode is explicitly gross energy; entering an active-calorie amount would answer a different question.
Mixed-Gait Sessions
If you spend part of a ride walking and part trotting, calculate each segment separately and add the gross outputs. For a 70 kg rider, 30 minutes walking produces 139.65 gross kcal and 30 minutes trotting produces 213.15, for 352.80 total. Applying the trotting value to the entire hour would count the walking period at the higher activity rate. Separate waiting, grooming, and other non-riding time from the entered riding segment.
Units and Zero Values
Each time input has minutes or hours beside it. One hour is converted to 60 minutes. Zero time or a zero gross-calorie amount is allowed and produces zero energy or zero time. Rider weight must be positive. The calorie unit is kilocalories, abbreviated kcal; the nutritional Calorie commonly used in activity tracking is one kilocalorie.
Why Personal Results Differ
MET values summarize activities at population level. Riding skill, posture, terrain, the horse’s movement, effort, and individual physiology can change actual expenditure. The calculator does not adjust for age, fitness, body composition, or measured oxygen consumption. Treat small differences between tools as model differences unless the underlying activity, time, weight, and gross-versus-active baseline are the same.
Reference Table
| Riding activity | MET | Gross energy | Active energy above 1 MET |
|---|---|---|---|
| Walking | 3.8 | 279.30 kcal | 205.80 kcal |
| General riding | 5.5 | 404.25 kcal | 330.75 kcal |
| Trotting | 5.8 | 426.30 kcal | 352.80 kcal |
| Canter or gallop | 7.3 | 536.55 kcal | 463.05 kcal |
| Jumping | 9.0 | 661.50 kcal | 588.00 kcal |
| Reining | 6.0 | 441.00 kcal | 367.50 kcal |

Sources
2024 Adult Compendium of Physical Activities, Sports activity codes 15370, 15390, 15395, 15400, 15402, and 15403; Compendium Unit Conversions. Example values use the stated MET equation.