# Calorie Calculator by Maxios | Estimate Daily Calories

Estimate daily calories, maintenance calories, starter macros, and food energy conversions, then track meals and progress in Maxios.

Canonical URL: https://getmaxios.com/tools/calorie-calculator/
Markdown twin: https://getmaxios.com/tools/calorie-calculator.md
Launch list: https://getmaxios.com/#launch-list

## What the calorie calculator estimates

- The calorie calculator estimates basal metabolic rate, maintenance calories, weight loss or gain targets, starter macros, and food energy conversions.
- Inputs include age, sex, height, weight, activity level, and goal.
- The estimate updates in the browser as the form changes.

## Formula used

- BMR is estimated with the Mifflin-St Jeor equation.
- Maintenance calories are estimated as BMR multiplied by an activity factor.
- Goal targets apply a moderate deficit or surplus to the maintenance estimate.
- Starter macros convert calories into protein and carbs at 4 kcal per gram and fat at 9 kcal per gram.

## Example daily target

For a 25-year-old male, 180 cm, 65 kg, with moderate activity, the calculator shows maintenance near 2,424 kcal/day and a moderate weight-loss target near 1,924 kcal/day.

## After calculating

Use Maxios to log real meals and adjust targets based on your weight trend and consistency.

## FAQ

### How does this calorie calculator work?

It estimates BMR with the Mifflin-St Jeor equation, then multiplies by an activity factor to estimate daily maintenance calories.

### Are calorie calculator results exact?

No. Results are estimates. Real calorie needs vary with training, body composition, health, sleep, stress, and tracking accuracy.

### Can I use this for weight loss?

Yes, it can estimate a daily target for weight loss, but aggressive deficits can be unsafe without qualified guidance.