What this calculator does
The Farm Work Calories Burned Calculator estimates how much energy (in kilocalories) you spend on common agricultural and gardening tasks. It uses the MET (metabolic equivalent of task) method, the same approach used in fitness trackers and public-health guidelines. You enter your body weight and the number of minutes spent on each task, and the calculator multiplies these by each task's MET value to produce a per-task and total calorie estimate.
The MET reference values used here follow Japan's Ministry of Health, Labour and Welfare "Physical Activity Reference for Health Promotion 2013." However, the calorie formula itself is universal and applies anywhere in the world.
The formula explained
One MET represents the energy you burn at rest, roughly 1.05 kcal per kilogram of body weight per hour. The energy for one activity is:
$$\text{kcal} = \text{MET} \times \text{weight(kg)} \times (\text{minutes} \div 60) \times 1.05$$
Each farm task has a typical MET: watering plants 2.5, weeding 4.5, planting seedlings 4.5, feeding livestock 4.0, tilling/cultivating 4.5, shoveling soil or mud 5.5, and bundling hay 5.0. The total is the sum across every task you enter.
How to use it
Enter your body weight in kilograms, then fill in how many minutes you spent on each task (leave a task at 0 if you did not do it). The calculator returns the total calories burned plus a breakdown by task.
Worked example
Suppose you weigh 60 kg and spend 10 minutes watering plants and 60 minutes tilling. Watering = \(2.5 \times 60 \times (10/60) \times 1.05 = 26.25\) kcal. Tilling = \(4.5 \times 60 \times (60/60) \times 1.05 = 283.5\) kcal. Total = \(309.75\) kcal, about 310 kcal.
FAQ
Is the result exact? No. MET-based estimates are approximations for an average person; actual burn varies with intensity, fitness, age, and terrain.
Why divide minutes by 60? The formula needs time in hours, so minutes are converted to hours before multiplying.
Does heavier mean more calories? Yes. Body weight is a direct multiplier, so a heavier person burns more calories doing the same task for the same time.
