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Calorie & macro calculator

A reliable, data-backed starting point for your calories and macros, based on your body, your activity, and your goals. It's informational, not medical advice. Start here, watch what your body tells you, and refine as you go.

Watch this first: how to use the calculator
The calculator

Get your numbers.

Fill in your details for a personalized estimate. Everything stays in your browser, nothing is sent or stored.

Your details

Be honest about activity level. Most people overestimate, so if you're between two, pick the lower.
0.5%
Percent of current body weight per week. Capped at 1% for sustainability.
0%
Shift the carb/fat balance toward carbs (right) or fat (left). Protein and calories stay fixed.
Enter your details and press Calculate to see your personalized calorie and macro targets.
How to actually use this

The number is the start, not the answer.

1

Start with the estimate

Use your calculated calories and protein as your baseline for the next week or two. Don't chase perfection, just get consistent.

2

Track and watch the trend

Log your food and weigh in. Look at the weekly trend, not daily noise from sodium, water, or a meal out.

3

Make small weekly tweaks

Compare your trend to your goal each week. Slower than planned? Trim slightly. Too fast or drained? Add a little back. That's the whole system.

Frequently asked questions

Common questions about calories & macros.

How accurate is this calorie calculator?

It gives you a reliable starting point. The goal isn't perfection. It's to start with a data-backed estimate, apply it to real life, and make small weekly adjustments based on your progress and how you feel.

Do I have to weigh myself every day?

No. Daily weigh-ins help some people see trends instead of reacting to single days, but it isn't required. If daily weighing creates stress, use weekly check-ins and focus on your calorie targets and food tracking.

What should I focus on with macros?

Calories and protein matter most. Aim for about 0.8 to 1 gram of protein per pound of your ideal body weight. Carbs and fats can float based on your preferences and activity level as long as you stay within your calorie target.

What if my weight jumps up unexpectedly?

Daily fluctuations are normal. Sodium, creatine, hydration, and meals out can bump the scale for a day or two. Look at the weekly trend, not the day-to-day noise.

How do I adjust my calories over time?

Compare your trend to your goal at the end of each week. If weight loss is slower than planned, reduce calories slightly. If it's too fast or you feel drained, increase slightly. Small weekly tweaks are the entire system.

Can I eat foods like pasta or cheese and still lose weight?

Yes. Weight loss is driven by your calorie deficit, not cutting out entire food groups. Tracking helps you manage portion sizes so you can include foods you love.

Do I need to exercise to lose weight?

Not for weight loss alone. Training supports muscle retention, strength, and long-term health, but the calorie deficit drives the scale. Many people start with nutrition first and layer in training when they're ready.

How should I track my food?

Use an app like Cronometer, MyFitnessPal, or MacroFactor. A food scale will make your tracking more accurate. When you're eating out, estimating is fine. Being close is better than not tracking at all.

Is this system right for everyone?

It works for many people but not all. The principles stay the same, but your method should match your personality. Use the parts that fit you. Ignore the parts that don't.

What if I want help applying all of this?

We offer nutrition coaching as a standalone service or built into our UltraLife custom coaching programs. You can book a free strategy session if you want support, structure, and feedback tailored to you.