About ForgeYourFit

Built for people who want real answers.

ForgeYourFit is a collection of free, accurate fitness and nutrition calculators. No ads, no signup walls, no upsells — just tools that give you honest, useful information about what you eat and how you move.

Honest math · No login · Sources cited

Why We Built This

Why we built this.

02 paragraphs

Most nutrition and fitness calculator sites are cluttered with ads, require you to create an account just to see a number, or give you results so generic they are barely useful. We built ForgeYourFit because we believe the information you need to make smart health decisions should be free and fast to access.

Every calculator on this site uses validated formulas and official restaurant nutrition data. Each page names the formula or data source behind its numbers, so you can check them yourself.

What We Stand For

What we stand for.

04 entries

No. 01

✓

Always free

Every tool on this site is completely free to use with no account required.

No. 02

📊

Accurate data

We use official restaurant nutrition PDFs and validated scientific formulas.

No. 03

⚡

Instant results

No loading screens, no page refreshes — results update as you build your order.

No. 04

📱

Mobile first

Every tool is designed to work perfectly on your phone while you are in line.

Our Calculators

Our calculators.

15 entries

We currently offer fifteen free calculators covering fitness, body composition, and restaurant nutrition. More are on the way. Our goal is to be the most comprehensive and accurate free calculator resource for health-conscious people in the US and UK.

Rucking Calorie Calculator Calories burned rucking by weight, pack load, and pace.

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TDEE Calculator Daily calorie burn plus cut and bulk targets.

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One-Rep Max Calculator Estimate your 1RM with three validated formulas.

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Body Fat Calculator U.S. Navy method body fat, fat mass, and lean mass.

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Water Intake Calculator Personalized daily hydration by weight and activity.

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Reverse BMI Calculator Find your ideal goal weight by target BMI and height.

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BMI Calculator BMI, WHO category, and healthy weight range.

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BMI Chart by Height & Weight Healthy weight range for every height, in lb and kg.

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Ideal Weight Calculator Five clinical formulas with a consensus range.

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Body Roundness Index Waist-to-height measure of central body fat.

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Siri Body Fat Calculator Skinfold body fat with Jackson-Pollock and Siri.

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Chipotle Calorie Calculator Real-time macros for any Chipotle order.

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Dunkin Calorie Calculator Full menu calorie tracking for Dunkin orders.

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Qdoba Calorie Calculator Bowl and burrito macro tracker for Qdoba.

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Cava Calorie Calculator Mediterranean bowl nutrition tracker for Cava.

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Data Sources and Accuracy

Data sources & accuracy.

Restaurant nutrition data is sourced from official brand nutrition PDFs and websites, updated for 2026. Fitness calculators use published equations — Pandolf for rucking, Mifflin-St Jeor for TDEE, the U.S. Navy method for body fat — and WHO BMI categories. All values are estimates — portion sizes vary by location and preparation, and the FDA permits a 20 percent variance on published restaurant nutrition data.

Get in Touch

Contact & feedback.

We are always looking to improve. If you find an error in our data, want to suggest a new calculator, or just want to say hello, reach out at info@forgeyourfit.com or use our contact form.

Next step

Start calculating.

Pick a calculator below and get instant, accurate results for free.

Fitness Calculators Restaurant Calculators