About Us

CalculatorLA.com is a free, independent collection of calculators for health, mathematics, and everyday planning. It was built around a simple idea: a calculator page should load in an instant, work equally well on a phone or a laptop, and never ask you to sign up or hand over personal data before giving you an answer.

Why this site exists

Most calculator websites available today were built years ago, are heavy with advertising, and load slowly on mobile. CalculatorLA.com was built the opposite way: every page is lightweight, fast, and designed mobile-first from the start, with clear explanations instead of clutter.

What you'll find here

The site currently offers thirteen calculators, organized into three groups:

• Fitness & Health — BMI Calculator, Calorie Calculator, Body Fat Calculator, BMR Calculator, Ideal Weight Calculator, and a combined Pregnancy & Period Calculator.
• Math — a full Scientific Calculator, a three-mode Percentage Calculator, and a Random Number Generator.
• Everyday planning — an Age Calculator, a Date Calculator (difference, add/subtract, and live countdown), a Time Calculator, and an Hours Calculator for work hours and pay.

Every calculator page also includes a written explanation of the formula it uses — the Mifflin-St Jeor equation for BMR and calories, the U.S. Navy circumference method for body fat, Naegele's rule for due dates, and so on — so the result isn't just a number, it's a number you can understand and check.

How the calculators work

Every calculation on this site runs entirely inside your own browser using JavaScript. There is no server-side processing of the numbers you type, no account system, and no calculator input is ever transmitted or stored anywhere. You can read more about this in our Privacy Policy.

Who's behind it

CalculatorLA.com is built and maintained independently, not by a large company. That means updates are driven directly by user feedback rather than a corporate roadmap — if a calculator is missing a feature or a formula needs a second look, a message through the Contact page genuinely reaches the person who can fix it.

A note on accuracy

Every formula used on this site is drawn from established, published sources rather than approximated, and each calculator page explains exactly which method it uses and why. That said, these tools are meant to inform, not replace a conversation with a doctor, dietitian, or financial advisor when it matters — see our Terms of Service for details.