Your one-stop place for free calculators and online tools

Simple Tools to Help You Calculate Better

From managing money to tracking your health or organizing your time, these calculators are built to make life easier. No sign-up, no clutter—just quick results when you need them.

Finance Calculators

Loan EMI Calculator EMI Calculator Savings Calculator Currency Converter

Health & Fitness Tools

BMI Calculator Calorie Calculator Body Fat Percentage

Text & Coding Tools

Word Counter Case Converter JSON Formatter

Time & Date Tools

Age Calculator Time Zone Converter Sunrise & Sunset Calculator

Income Tax Calculator

Income Tax Calculator

Smart, Simple, and Reliable Calculators

At PrimaryCalc, we offer a wide collection of accurate and easy-to-use calculators designed to help you make better decisions—whether you're managing your money, tracking your health, or working with text and time. Our tools are created for everyday use and are completely free, with no login or installation required.

From calculating monthly loan payments and estimating your body mass index, to formatting JSON data or finding your exact age in seconds—we’ve got you covered. Our calculators are built to be fast, mobile-friendly, and accessible to users around the world. Whether you're a student, professional, or someone who just wants to save time, PrimaryCalc offers tools you can count on.

We also publish useful blog articles that explain how to use our calculators, provide helpful tips, and explore real-life applications of numbers and logic. Everything is written in clear, simple English for a global audience—especially our friends in the U.S., India, Canada, UK, and beyond.

PrimaryCalc is constantly growing. We’re adding new calculators and improving existing ones to make sure you always get accurate results. Whether you’re calculating EMI for a loan, checking your calorie needs, or converting time zones—PrimaryCalc makes it effortless.

Explore Our Latest Blog Posts

Learn how to use our tools more effectively and discover insights on finance, health, tech, and productivity...

Cold & Flu Season: Simple Care, Smart Prevention, and Staying Healthy November 10, 2025

The cold and flu season knocking on the door again. Drink plenty of water, wear a mask in crowded places, wash your hands often, and rest well. These small daily actions can make a b...

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How a Good Face Mask Can Save You from Air Pollution November 10, 2025

Did you know that a good-quality face mask can block up to 95–99% of harmful particles from polluted air? Yes — something as simple as wearing the right mask can protect your lungs fro...

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Yoga for Anxiety and Depression: A Natural Path to Mental Well-being August 05, 2025

Quick Introduction Anxiety and depression are rising across the world, affecting millions of people. Yoga offers a natural, safe, and time-tested way to manage both conditions — without ...

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