Free Online Calculators, Converters & AI Micro-Tools
Calculate, convert and solve everyday problems with simple, accurate and free online tools. Fast, private, and 100% client-side.
Explore Free Online Tools & Calculators
Filter tools dynamically or type to search across all client-side apps.
Percentage Calculator
Calculate percentages, find what percent a number is of another, or calculate values from percentages.
Percentage Increase Calculator
Calculate the percentage increase from an initial value to a final value.
Percentage Decrease Calculator
Calculate the percentage drop or reduction between an initial value and a smaller final value.
Average Calculator
Calculate the arithmetic mean, sum, count, minimum, and maximum of a set of numbers.
Ratio Calculator
Simplify ratios to simplest form and solve proportions.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
GPA & Weighted Grade Calculator
Calculate semester and cumulative Grade Point Average (GPA), weighted grade points, and class credits.
Profit & Loss Calculator
Calculate profit or loss amount and percentage based on cost price and selling price.
Discount Calculator
Calculate sale prices and savings after applying discount percentages.
Browse Tools by Category
10 specialized tool suites optimized for quick calculation, conversion, and workflow speed.
AI Micro-Tools
Generate ATS resume bullets, corporate email rewrites & Midjourney image prompts.
Developer Tools
Format JSON, encode Base64, build Linux cron expressions & decode JWT tokens.
Finance & EMIs
Loan EMI estimates, SIP mutual fund growth, simple & compound interest calculators.
Math Calculators
Percentage, ratio, percentage increase/decrease, average & fraction tools.
Unit Converters
Convert length, weight, temperature, area, volume & digital data storage units.
Text & Writing Tools
Word counter, character counter, letter case converter & whitespace cleaner.
Date & Time
Calculate exact age, days between dates & working business day counts.
Health & Fitness
Body Mass Index (BMI), Basal Metabolic Rate (BMR) & daily TDEE calorie estimates.
India Tax & Finance
New Tax Regime FY 2025-26, Gratuity, PPF maturity & EPF provident fund.
Everyday Utilities
Fuel trip cost calculator, appliance electricity usage & paint gallon estimators.
Educational Guides & Step-by-Step Formulas
Learn the exact formulas behind our calculators with worked examples.
How to Calculate Percentage: Formula, Steps, and Examples
Learn how to calculate percentages of numbers, fractions, and test scores with step-by-step formulas and practical examples.
How Percentage Increase Works: Formula and Real-World Examples
Understand how percentage growth is calculated for salaries, stock prices, inflation rates, and business revenues.
How Percentage Decrease Works: Formula and Price Drop Guide
Learn how to compute percentage reductions, store sales, weight drops, and market depreciation.
How EMI Is Calculated: Formula, Amortization, and Loan Tips
Discover how bank loan monthly EMIs are calculated using reducing balance interest formulas.
Why Millions Prefer Zovixia
Designed for speed, data privacy, modern aesthetic quality, and frictionless everyday productivity.
0ms Latency Engine
Calculations run directly inside your device browser runtime for instant results with zero network lag.
100% Private Client-Side
Your financial numbers, health data, and text payloads are never sent to external servers or logged.
Verified Algorithms
Mathematical formulas, loan EMI equations, and unit ratios are validated against standard formulas.
No Account Required
Complete free access to 30+ calculators, converters, developer utilities, and AI micro-tools anytime.
Everything You Need to Know
Got questions about speed, security, or accuracy? Here are clear answers.
Yes, 100% of the calculators, unit converters, developer utilities, and AI micro-tools on Zovixia are completely free. There are no mandatory signups, trial limits, or paid paywalls.