Calorie Calculator
Find out how many calories you need each day for maintenance, weight loss or gain. Just enter your age, sex, height, weight & activity level to get started.
Body Type Calculator:
The Calorie Calculator is a tool that is used to estimate your daily calorie intake based on your age, sex, height, weight, and activity level. It calculates your basal metabolic rate (BMR) and multiplies it by an activity factor to provide your overall daily energy spending (TDEE). Based on this, you can make goals of how many calories to consume so that you can maintain, lose, or gain weight.
Work & Installation — Input to Output Summary:
Input:
- Age (years)
- Sex (male/female)
- Height (cm or in)
- Weight (kg or lbs)
- Activity Level (e.g., sedentary, lightly active, moderately active, very active)
- Process / Formula:
Many calculators are based on formulas like the Harris‑Benedict equation for BMR:
\( BMR_{men}= 66.47 +(13.75 \times wight_{kg}) + (5.003 \times height_{cm}) \times (6.755 \times age) \)
where ActivityFactor might be: 1.2 (sedentary), 1.375 (light), 1.55 (moderate), 1.725 (very active), etc.
Output:
- Estimated BMR (calories per day at rest)
- Estimated TDEE (calories per day accounting for activity)
- Suggested calorie intake to maintain weight (≈ TDEE)
- Suggested calorie intake to lose weight (e.g., TDEE – 500 kcal/day) or to gain weight (TDEE + 500 kcal/day)
Example Data Table:
| Activity Level | Multiplier | Estimated Daily Calories |
|---|---|---|
| Sedentary (little or no exercise) | 1.2 | BMR × 1.2 |
| Lightly active (light exercise/sports 1-3 days/week) | 1.375 | BMR × 1.375 |
| Moderately active (moderate exercise/sports 3-5 days/week) | 1.55 | BMR × 1.55 |
| Very active (hard exercise/sports 6-7 days/week) | 1.725 | BMR × 1.725 |
Testing and Final Adjustments
Test the calculator using various profiles (young/ old, male/ female, various weights/ heights) and see that the BMR/ TDEE estimates are in line with those provided in the literature. Check the unit conversion (kg ⌄ lbs, cm ⌄ in). Make sure the input values are realistic (age bigger than 10, height bigger than 100 cm, weight bigger than 30 kg). Enable users to alternate among the modes of maintenance, weight loss, weight gain, and set calorie goals. Include field tool-tips (e.g., the description of the activity level that best suits your daily routine). Outputs in colour-codes (maintenance (green) and a slight change (yellow) and a large deficit/surplus (red). Appendix Aa disclaimer: it is not a medical prescription but an estimate of a medical prescription. Make sure that you use keywords in your low-competition list in headings, buttons, and meta descriptions as they come naturally. Mobile input to be optimized, numeric keypad with minimum scrolling. Lastly, the speed of the check pages and that they load quickly on devices that are popular in Bangladesh and other places.
