✨ 100% Free & Private Tools

Free Online Calculators for Math, Finance & Academics

Fast, accurate, and free online calculators for students, professionals, and developers. We also offer useful generators like password, UUID, and number generators — all private and instant.

Most Used

Popular Calculators

Percentage Calculator

Quickly find percentages, increases, and decreases.

Age Calculator

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

Negative Marking Calculator

Calculate total score by deducting marks for wrong answers.

CGPA Calculator

Convert your grades or percentage into CGPA instantly.

GST Calculator

Add or remove Goods and Service Tax from any amount.

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Explore by Category

Finance Health & Fitness Academic Science Math & Algebra Time & Date Business & Tax

Developer Tools

Popular Generators

Free online generators for developers and creators, including password generators, UUID generators, and random data tools.

Password Generator

Create strong, secure passwords instantly.

Number Generator

Generate random numbers within a specific range.

UUID Generator

Generate Version 1 and 4 UUIDs for development.

Name Generator

Create random names for characters or testing.

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Why use OmixCalculator?

100% Free

No subscriptions, no hidden fees. All tools are completely open for everyone.

Private & Secure

Calculations happen right in your browser. Your data never leaves your device.

Mobile Friendly

Optimized for phones, tablets, and desktops so you can calculate on the go.

Our Core Focus

Financial Accuracy Precise tools for GST, EMI, and loan planning.

Health Insights Monitor vital stats with BMI and fitness tools.

Academic Aid Grading and CGPA tools for students.

Developer Utilities Secure password, UUID & data generators.