Maintenance Calories Matter
Maintenance calories show the energy your body may need each day. This calculator estimates that level with common nutrition equations. It also converts the answer into weekly calories, kilojoules, and macronutrient targets. The goal is simple. You can plan food without guessing.
The tool accepts metric and U.S. units. It converts height and weight before formulas run. It supports Mifflin St Jeor, revised Harris Benedict, Katch McArdle, and an average option. Katch McArdle needs body fat percentage. When that value is missing, the tool uses the selected standard equation.
Activity changes the final estimate. A desk day needs fewer calories than heavy training. The multiplier should match your normal week. Do not choose the hardest day only. Use an honest average. Then review the range around maintenance. The lower range can help during light fat loss. The higher range can support demanding training days.
Advanced Options
Thermic effect of food can be added as a percentage. This is optional. Some users also add an adaptive offset. Use a negative offset when your real weight trend suggests the formula is high. Use a positive offset when the estimate is low. These settings make the calculator more practical.
Macro results are shown from your chosen percentages. Protein, fat, and carbohydrate grams are calculated from calorie values. Protein and carbohydrate use four calories per gram. Fat uses nine calories per gram. The results are planning targets, not medical rules.
Use the export buttons after calculation. The CSV file helps spreadsheet tracking. The PDF file gives a simple saved report. Keep the example table nearby. It shows how different activity levels can change daily maintenance.
Better Tracking
Your real maintenance is proven by weight trends. Track body weight for two to four weeks. Keep intake consistent. If weight rises, intake is above maintenance. If weight falls, intake is below maintenance. Adjust by small steps. A change of 100 to 200 calories is often enough. Recalculate when weight, training, or daily movement changes.
Remember that maintenance is a moving target. Sleep, stress, steps, hormones, and training load can shift energy needs. Use the result as a strong starting point. Then refine it with logs, averages, and patient observation over each month.