Free Fitness Calculators
Four tools that answer the questions behind every nutrition plan. How much do I burn? Where do I stand? How long will it take? What should I eat? All evidence-based, all instant, all free.
TDEE Calculator
How many calories do you actually burn?
Calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor equation. Get your BMR, daily burn, and personalized macro targets for weight loss, maintenance, or muscle gain.
BMI Calculator
Quick body composition check.
Find your Body Mass Index in seconds. See where you fall on the scale, your healthy weight range for your height, and what the number actually means (and what it doesn't).
Calorie Deficit Calculator
Your weight loss timeline, mapped out.
Enter your current weight, goal weight, and activity level. Get an exact daily calorie target, weekly loss rate, and projected date you'll hit your goal. Includes safety guardrails.
Macro Calculator
Protein, carbs, and fat — dialed in.
Get your daily macronutrient targets in grams. Choose from 5 diet styles (balanced, high protein, low carb, keto, zone) and see per-meal breakdowns for 3 or 4 meals a day.
Why we built these (and gave them away)
Most fitness calculators online are ad-infested, bloated with unnecessary fields, or try to upsell you on a coaching program before showing your results. We wanted something better: fast tools that give you a number you can trust, then get out of your way.
Every calculator on this page uses peer-reviewed formulas. The TDEE and deficit calculators use the Mifflin-St Jeor equation, recommended by the American Dietetic Association as the most accurate for the general population. The BMI calculator uses the standard WHO formula with context about its limitations.
Calculators give you the target. CalShot helps you hit it.
Knowing your TDEE is 2,400 calories is useful. Knowing that the lunch you just ate was 780 calories is actionable. That gap between "what you should eat" and "what you actually ate" is where most diet plans fail.
CalShot bridges that gap. Snap a photo of your meal, get an instant calorie and macro estimate. No barcode scanning, no database searches, no manual logging. Use the calculators on this page to set your targets, then use the scanner to track whether you hit them.
How to use these tools together
- Start with TDEE. Find out how many calories your body burns per day. This is your baseline.
- Check your BMI. Get a quick read on where you are now. Not perfect, but useful as a starting reference.
- Plan with the deficit calculator. If you want to lose weight, set your goal and see exactly how many calories to eat per day and how long it will take.
- Track with CalShot. Photograph your meals to see if your actual intake matches your plan. Adjust as needed.
Numbers are a start. Tracking is the habit.
You now know your targets. CalShot makes it dead simple to see if you are actually hitting them, meal by meal, no logging required.
Scan your first meal — free3 free scans per day. No account needed.
CalShot is not a substitute for professional dietary advice. Estimates are approximate.
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