Example Data Table
These examples show common settings. Actual needs can differ.
| Profile |
Weight |
Activity |
Goal |
Estimated Target |
| Female, 30, 165 cm |
70 kg |
Light |
0.5 kg/week |
About 1,430 kcal/day |
| Male, 35, 178 cm |
90 kg |
Moderate |
0.5 kg/week |
About 2,270 kcal/day |
| Female, 42, 160 cm |
82 kg |
Sedentary |
350 kcal deficit |
About 1,410 kcal/day |
| Male, 28, 183 cm |
100 kg |
Very active |
1 lb/week |
About 2,850 kcal/day |
Formula Used
The calculator first estimates basal metabolic rate. It supports three equations. The default equation is Mifflin-St Jeor.
Male BMR = 10W + 6.25H - 5A + 5
Female BMR = 10W + 6.25H - 5A - 161
W means weight in kilograms. H means height in centimeters. A means age in years.
TDEE = BMR × activity factor + extra exercise calories
Target kcal = TDEE - daily deficit
Weekly kg loss = daily deficit × 7 ÷ 7700
Macro calories use four kcal per gram for protein and carbs. Fat uses nine kcal per gram.
Kcal Planning for Weight Loss
A kcal plan gives structure to weight loss. It turns guesswork into a daily target. The calculator starts with your body data. Then it estimates the energy you may burn each day. This number is called total daily energy expenditure. A moderate deficit is then removed. The result is a practical intake target.
Why the Deficit Matters
Fat loss usually needs a consistent energy gap. A small gap is easier to follow. A large gap may feel fast, but it can be harder to sustain. It may also reduce training quality, hunger control, and daily energy. This tool shows the requested deficit and the actual deficit. The kcal floor helps stop very low outputs.
Use Activity Honestly
Activity level changes the final number a lot. Choose sedentary if most days involve sitting. Choose moderate when exercise is regular and your steps are decent. Do not add exercise twice. If your activity option already includes workouts, keep extra exercise calories at zero. This keeps the target cleaner.
Macros Support the Target
Calories drive the main estimate. Macros help shape food quality. Protein supports fullness and lean mass. Fat supports hormones and meal satisfaction. Carbs fill the remaining energy and support training. The calculator gives gram targets, so meals are easier to plan. You can change protein per kilogram and fat percentage.
Review and Adjust
No calculator can know every detail. Sleep, stress, medication, water, and tracking accuracy can change results. Use the result for two to four weeks. Track body weight trends, not single weigh-ins. If progress is too slow, adjust slightly. If energy is poor, raise calories or reduce the goal speed. A steady plan often wins.
Track the Trend
Daily scale weight can jump. Salt, carbs, soreness, and sleep can hold water. Use a weekly average instead. Compare the average with the prior week. Also record waist size, hunger, steps, and gym strength. These signs show whether the plan fits real life. When weight drops too quickly, raise intake. When weight stalls for several weeks, reduce intake a little or increase movement. Make changes slowly. Small changes are easier to measure.
FAQs
What does kcal mean?
Kcal means kilocalorie. In food labels, one calorie usually means one kilocalorie. This calculator uses kcal as the daily energy target for weight loss planning.
Which BMR formula should I choose?
Mifflin-St Jeor is a strong default for many adults. Harris-Benedict is useful for comparison. Katch-McArdle can help when you know body fat percentage.
Is a bigger deficit always better?
No. A bigger deficit can increase hunger and reduce energy. It may also make training harder. A moderate deficit is usually easier to keep.
Why did the calculator reduce my deficit?
The selected kcal floor can limit the deficit. This prevents the result from dropping below your chosen minimum intake level.
Should I eat back exercise calories?
Only add extra exercise calories when they are not included in your activity level. Adding them twice can overestimate your daily intake target.
How accurate is the timeline?
The timeline is an estimate. Real progress can change because of water shifts, tracking errors, metabolism changes, and adherence.
Can I use this during muscle gain?
This tool is designed for weight loss. For muscle gain, you would usually use maintenance calories plus a small surplus.
Do I need medical advice?
Seek professional guidance if you are pregnant, underweight, diabetic, recovering from illness, or managing a medical condition.