About

EVR (evrperform.com) publishes free fitness and training calculators. The calculators estimate energy, macros, and strength. Separate Army standards pages apply published Army rules to measurements you enter. A result is an estimate from a named formula and the values you type. It is not a direct measurement of you.

Energy calculators cover resting energy, energy across a day, a higher or lower daily target, and energy used in a session. They also cover training figures that sit beside those questions, including pace and water intake. Macro calculators turn an energy figure into protein, carbohydrate, and fat. Strength calculators estimate a one-rep max from a set, show how to load a bar, and score a powerlifting total against bodyweight.

The Army standards pages are the waist-to-height page and theenlistment height and weight page. The waist-to-height page follows Army Directive 2026-13. The height and weight page follows the enlistment tables in AR 40-501. Both pages name the document they use. They are independent estimates for reading those standards. They are not an official Army measurement, and they are not an Army record.

You can open a calculator without an account. The calculation runs in your browser from the values on the page.

Where the formulas come from

EVR takes formulas from published primary sources. Each calculator page names the sources for the formula it runs. The page states the equation, the units, and the assumptions behind the estimate. Where two published methods answer the same question, the page can show both and leave the difference in view.

The formula families the site cites are Mifflin-St Jeor,Katch-McArdle,Wilks, DOTS,Epley and Brzycki,Jackson-Pollock, theCompendium of Physical Activities, and Army directives and regulations. Those names appear on the calculator pages that use them, with the publication that page relies on. This page does not add sources. If a calculator page does not name a method, that method is not part of the calculator.

The same rule covers the Army pages. A standard on those pages is the standard in the directive or regulation the page cites. EVR does not substitute a different cutoff or a different table.

How calculators are checked

Each calculator has a worked default example. The example is the result shown before you change an input. Automated tests compute that example again and compare it with the result rendered on the page. The tests run on every change. A change that breaks a worked example fails the test.

Those tests check the arithmetic the page claims to perform. They do not measure a person. They do not show that a population formula describes you.

Corrections

If a formula, a citation, a unit, or a worked example looks wrong, report it through theContact page. Name the page, what you entered, and what you expected to see. EVR compares the report with the published source and the tests. When the report is right, the page is corrected.

Educational information, not medical advice

EVR is educational. The calculators and the Army pages are general information and mathematical estimates. They are not medical advice. They are not a diagnosis, a prescription, or a plan made for one person. For a health decision, consult a qualified professional. Read the limitations written on the calculator page before you rely on an estimate.

Advertising

The site may show ads so the calculators can stay free. An advertisement does not change a formula, a default example, or the result on the page. The Privacy Policy and theTerms of Use describe advertising and the rest of the rules for using EVR.