Calculators

Free Online Calculators & Converters | Age, BMI, Unit, Interest Tools

Free Online Calculators & Converters

Access a collection of powerful calculators and converters online at TechFeaturesNet. Calculate age, age difference, BMI, bank interest, scientific calculations, or convert units instantly — free, secure, and mobile-friendly.

Age Calculator

Calculate your exact age in years, months, and days easily.

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Age Difference Calculator

Find the difference in age between two people instantly.

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BMI Calculator

Calculate your Body Mass Index and check if you're underweight, healthy, or overweight.

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Scientific Calculator

Advanced online scientific calculator — trig, logs, exponentials, factorials, memory and more. Fast and mobile-friendly.

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Unit Converter

Convert units of length, weight, area, volume, and more with ease.

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Bank Interest Calculator

Calculate simple and compound interest quickly for your savings and loans.

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Area Calculator

Calculate the area of squares, rectangles, circles, triangles, and more instantly.

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Temperature Converter

Convert temperatures between Celsius, Fahrenheit, and Kelvin with ease.

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Calories Calculator

Calculate your daily calorie needs and track your nutrition goals.

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Algebra Calculator

Solve algebraic equations, simplify expressions, and graph functions.

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Geometry Calculator

Calculate perimeter, volume, angles, and solve geometric problems.

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Powerful Online Calculators

Free online calculators for math, finance, health, and daily life. Fast, accurate, and easy to use.

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Math Calculators

Perform quick calculations like percentages, averages, ratios, and equations online.

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Financial Calculators

Calculate loans, EMIs, investments, and savings to make better financial decisions.

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Health Calculators

Track BMI, calorie needs, ideal weight, and other health metrics instantly.

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Date & Time Calculators

Calculate age, duration, countdowns, and other date-related tasks easily.

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Unit Converters

Convert length, weight, temperature, currency, and more with precision.

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Advanced Calculators

Use scientific and statistical calculators for professional and academic needs.

Frequently Asked Questions (FAQ)

1. What are online calculators?

Online calculators help you solve math, finance, health, and everyday calculations instantly without downloading software.

2. Are the calculators free to use?

Yes, all our online calculators are completely free and accessible anytime on any device.

3. Can I use financial calculators for EMI and loans?

Absolutely. Our financial calculators cover EMIs, loan repayments, investments, and savings to help you plan better.

4. Are the results accurate?

Yes, our calculators are built with accurate formulas to give you reliable results in real-time.

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Frequently Asked Questions

Are these tools free to use?

Yes—every tool on TechFeaturesNet is free, browser-based, and mobile-friendly.

Do you store my files or data?

No—processing is secure and privacy-focused. Many tools work client-side so your files stay on your device.

Where should I start?

Try PDF Tools, Invoice Generators, Calculators, ID Card Maker, or browse All Tools.