Legal notice & full medical disclaimer

This English version is provided for your convenience. If there is any discrepancy, the Spanish version prevails.

1. Site owner

In compliance with Article 10 of Spanish Law 34/2002 of 11 July on Information Society Services and Electronic Commerce (LSSI-CE), the owner of this website is identified below:

• Owner: [NOMBRE Y APELLIDOS O RAZÓN SOCIAL]
• Tax ID (NIF/CIF): [NÚMERO DE IDENTIFICACIÓN FISCAL]
• Address for notices: [DIRECCIÓN POSTAL COMPLETA]
• Contact email: hola@volkar.app
• Website: volkarfit.com
• Activity: publishing free fitness content and tools, funded by advertising and affiliate links.

Accessing and using this website makes you a user and means you fully accept this legal notice, as well as the terms of use, the privacy policy and the cookie policy. If you disagree with any of these documents, please do not use the site.

2. Purpose of the website

VOLKAR Fit is an informational project whose purpose is to offer the public a free calorie and macronutrient calculator for fitness and recreational training. The tool lets you enter a set of body and lifestyle details (weight, height, age, biological sex, activity level, training goal and diet style) and returns an estimate of daily calories and the matching split of protein, carbohydrates and fat.

All calculations run locally in the user’s browser using JavaScript. The site has no server of its own that processes this data, does not store it and does not send it to third parties. The PDF that can be downloaded at the end is also generated entirely on the user’s device.

3. What VOLKAR Fit is and is not

We think this distinction should be clear from the start, because everything else in this document depends on it.

VOLKAR Fit is an automatic estimation tool based on equations widely used in sports nutrition and in general training literature. It is meant as an informational starting point for healthy adults who train recreationally and want a number to work from and adjust.

VOLKAR Fit is not a health service, a medical device, a nutrition consultation or a substitute for professional judgment. There is no individual assessment behind the results: the tool does not know your medical history, your actual body composition, your lab results, your intolerances, your medications, your relationship with food or any other personal circumstance that a professional would take into account.

4. Full medical disclaimer

Here is what that warning covers.

The content of this website, including the calculator results, the explanatory texts, the FAQ and the downloadable PDF, is for informational, educational and general fitness purposes only. It must never be read as a diet prescription, an individual nutrition plan, a therapeutic recommendation or a clinical opinion about your particular case.

The information published here does not create any doctor–patient, dietitian–client or coach–client relationship between the user and the owner of the site. No one involved in creating this content is assessing your individual situation, tracking your progress or acting as the professional responsible for your health.

Before starting a diet, significantly changing your calorie intake, cutting out food groups, beginning an exercise program or adding supplements, we strongly recommend that you consult qualified health professionals: your primary care doctor, a registered dietitian, an endocrinologist or whichever professional fits your situation. This is especially important if you have, or suspect you may have, any pre-existing medical condition.

If, while following any eating or training plan, you notice symptoms such as dizziness, fainting, palpitations, chest pain, marked weakness, sleep problems, very fast weight loss or gain, menstrual changes, hair loss, intense anxiety around food or any other sign that worries you, stop what you are doing and seek medical care. No number on this website takes priority over what a professional who has examined you tells you.

5. Technical limits of the calculation

The calculator estimates basal metabolic rate with the Mifflin-St Jeor equation, then applies a multiplier based on the activity level you report and a percentage adjustment based on the goal and intensity you select. Macronutrients are split using reference percentages for each combination of diet and goal, within limits on protein per kilogram. Here is what that implies:

• These are population formulas, not measurements. They were derived from group averages. Your real energy expenditure may differ noticeably from the estimate, up or down.
• Body composition is not measured. Two people with the same weight, height, age and sex can have very different needs depending on their muscle and fat mass. The tool cannot tell them apart.
• Activity level is self-reported. People tend to misjudge how much they train and move, and this is one of the main sources of error in the result.
• Clinical factors are not considered. Thyroid disorders, medications, pregnancy, breastfeeding, and digestive, kidney or metabolic conditions substantially change real needs and are beyond the scope of an automatic calculator.
• Macro percentages are guidelines. There are many valid splits for the same goal. The ones we apply are common in fitness, not the only correct distribution.

For all these reasons, your result should be treated as a starting point to observe and adjust over several weeks, not as an exact truth about your body.

6. When you should not use this calculator

This tool is designed for healthy adults. We expressly ask you not to use it as a reference, and to go directly to a health professional, if any of the following applies to you:

• You are under 18 or still growing.
• You are pregnant, trying to become pregnant or breastfeeding.
• You have any type of diabetes or another blood sugar disorder.
• You have diagnosed kidney, liver, heart, lung or metabolic disease.
• You have a thyroid or other endocrine disorder.
• You have a history, suspicion or diagnosis of an eating disorder.
• You take medication that affects appetite, weight, metabolism or fluid and electrolyte balance.
• You are recovering from surgery, have had bariatric surgery, are undergoing cancer treatment or have any ongoing illness.
• You are an older adult with frailty, sarcopenia or a risk of malnutrition.

In these cases, any eating or training plan should be set and supervised by health professionals who know your full history.

7. About the supplements section

The supplements section is informational and commercial in nature. It covers products commonly used in sports (protein powder, creatine monohydrate and multivitamins) that are legally sold as food supplements, not as medicines.

The servings mentioned are general reference ranges, not a personal regimen. No food supplement should replace a varied, balanced diet and a healthy lifestyle, and you should discuss taking them with a health professional, especially if you take medication, have a medical condition or are in any of the situations listed above.

We do not manufacture, distribute or sell any of the products mentioned, and we cannot answer for their composition, quality, availability, price or the terms of the stores we link to.

8. Affiliate links and advertising

This website may be funded by advertising and affiliate programs. When that is the case, some links, in particular those in the supplements section and in the downloadable PDF, are affiliate links: if you go to a store through them and make a purchase, the owner of this website may earn a commission, at no extra cost to you and without changing the product’s price.

This commercial relationship is disclosed next to the links themselves and in the PDF, and it does not influence the calculator or the results it returns. Even so, we encourage you to compare prices, read labels and make your own decisions about any purchase.

The site may also show ads served by Google AdSense or other ad networks. How those ads and their cookies work is explained in the cookie policy and the privacy policy.

9. Intellectual property

The content of this website, including texts, navigation structure, graphic design, source code, images, logos and other elements, belongs to the owner of the site or is used with the appropriate permission, and is protected by Spanish and European intellectual and industrial property law.

Reproducing, distributing, publicly communicating, transforming or otherwise exploiting it, in whole or in part, without the owner’s express written permission is prohibited. You may, however, use the PDF generated by the tool for personal purposes and link to pages of the site, as long as you do so fairly, without causing confusion about its origin and without reproducing the content inside third-party frames.

10. Limitation of liability

The owner provides the content with all reasonable care, but does not guarantee that the information is always accurate, complete or up to date, or that the tool is error-free or available without interruption.

To the extent permitted by applicable law, the owner accepts no liability for damage or loss of any kind arising from:

• The use you make of the estimates, and any decisions about diet, training or supplements you take based on them.
• Entering incorrect, incomplete or unrepresentative data.
• Being unable to access the site, technical failures, service interruptions, or viruses or harmful elements introduced by third parties.
• The content, products, prices or practices of third-party websites we link to.

Nothing in this legal notice excludes or limits the owner’s liability where such exclusion or limitation is prohibited by law, in particular toward consumers.

11. Governing law and jurisdiction

This legal notice is governed by Spanish law. Any dispute arising from accessing or using the website will be submitted to the courts that have jurisdiction under applicable law, always respecting the jurisdiction that legally applies to users acting as consumers.

12. Changes and contact

The owner may update this legal notice to reflect legal, technical or operational changes. The current version is always the one published on this page, with its last update date.

If you have any questions about this document, write to hola@volkar.app. Please note that we do not answer health questions, create personal diets or provide clinical assessments: for that, please see a health professional.

Last updated: October 5, 2026.