# StrongCalcs

> Free fitness calculators — TDEE, BMR, macros, protein, 1RM, BMI, body fat, water intake, ideal weight and goal dates.


## Posts

- [How to Find Your One Rep Max Without Ever Testing It](https://strongcalcs.com/how-to-find-your-one-rep-max/): Your one rep max (1RM) is the heaviest weight you could lift once with good form.
- [Macros for Beginners: Protein, Carbs and Fat Explained Simply](https://strongcalcs.com/macros-for-beginners/): If you have spent any time around fitness content, you have heard people talk about "hitting their macros".
- [How Many Calories Should I Eat to Lose Weight? A Simple, Safe Method](https://strongcalcs.com/how-many-calories-to-lose-weight/): "Eat 1,200 calories" might be the most repeated — and most misleading — piece of diet advice on the internet.
- [What Is TDEE? The Only Calorie Number That Actually Matters](https://strongcalcs.com/what-is-tdee/): Almost every diet argument comes down to one question: how many calories should you eat?

## Pages

- [Weight Goal Date Calculator](https://strongcalcs.com/weight-goal-date-calculator/): The most common diet question is not "how" — it is "how long will this take?"
- [Ideal Weight Calculator](https://strongcalcs.com/ideal-weight-calculator/): "Ideal weight" formulas estimate the weight range associated with the lowest health risk for your height.
- [Water Intake Calculator](https://strongcalcs.com/water-intake-calculator/): Even mild dehydration costs you strength, focus and endurance — studies link a 2% drop in body water to a clear fall in physical and mental performance.
- [Protein Calculator](https://strongcalcs.com/protein-calculator/): Protein is the one macro that decides whether the weight you lose is fat or muscle — and whether the weight you gain is muscle or fat.
- [BMR Calculator](https://strongcalcs.com/bmr-calculator/): Your BMR (Basal Metabolic Rate) is the number of calories your body burns in 24 hours at complete rest — just to keep your heart beating, lungs breathing and temperature steady.
- [Blog](https://strongcalcs.com/blog/)
- [Contact](https://strongcalcs.com/contact/): Found a bug in a calculator? Have a suggestion for a new tool? We read everything.
- [Disclaimer](https://strongcalcs.com/disclaimer/): Every result produced by the calculators on this website is a mathematical estimate based on population-average formulas.
- [About](https://strongcalcs.com/about/): Fitness Calculators is a small, focused tool site: a handful of fitness calculators that are fast, free, and honest about how they work.
- [Body Fat Calculator](https://strongcalcs.com/body-fat-calculator/): This calculator estimates your body fat percentage with a tape measure, using the US Navy circumference method — the same technique used for military fitness assessments.
- [BMI Calculator](https://strongcalcs.com/bmi-calculator/): BMI (Body Mass Index) is a quick screening number that compares your weight to your height.
- [One Rep Max Calculator](https://strongcalcs.com/one-rep-max-calculator/): Your one rep max (1RM) is the heaviest weight you could lift for a single perfect repetition.
- [Macro Calculator](https://strongcalcs.com/macro-calculator/): Calories decide whether you gain or lose weight — macros (protein, carbohydrates and fat) decide what that weight is made of.
- [TDEE Calculator](https://strongcalcs.com/tdee-calculator/): Your TDEE (Total Daily Energy Expenditure) is the total number of calories you burn in a day, including exercise and everyday movement.
- [Home](https://strongcalcs.com/): Free, fast fitness calculators that run entirely in your browser — no sign-up, nothing you enter is stored or sent anywhere.
- [Privacy Policy](https://strongcalcs.com/privacy-policy/): Last updated: November 2026.


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