Fast, accurate calculators for everyday calculations. 100% free, no registration required.
Free online calculators for everyday use
Perform basic arithmetic operations like addition, subtraction, multiplication, and division
Calculate BMI with ideal weight range, metric & imperial. Privacy-first.
Estimate body fat % using waist, neck, and hip (US Navy method)
Find ideal body weight using Robinson, Miller, Devine, Hamwi formulas
Daily water intake by weight, activity, and climate
Calculate percentage of a number, increase & decrease
Calculate sale price, savings, and percent off
Perform advanced math with trigonometry, logarithms, and exponents
Find your BMR, TDEE, and daily calorie target for weight loss, maintenance, or gain
Convert salary to hourly, daily, weekly, or monthly pay based on working hours
Calculate profit margin, markup, and selling price for products or services
Find how many units or revenue needed to cover costs and break even
Calculate tips and split bills easily among people with customizable percentages
Calculate the exact difference between two dates in years, months, and days
Calculate GPA with grade inputs, credit hours, and cumulative GPA tracking
Estimate due date from last menstrual period or conception date
Predict ovulation day and fertile window for cycle tracking
Optimal wake and bed times based on 90-minute sleep cycles
Calculate overtime wages from hourly rate and extra hours
Convert hourly wage to weekly, monthly, and yearly income
Estimate trip fuel cost by distance, MPG or L/100km, and price
Estimate appliance cost from wattage, hours used, and price per kWh
Compare living costs between two cities using index values
Calculate freelance hourly rate from income goals and expenses
Calculate zakat on savings, gold, silver, and assets. Nisab and 2.5%.
Zakat on gold by weight, price per gram, and purity (nisab 85g)
Calculate donation from income and percentage or fixed amount
Estimate reading time from word count and reading speed (WPM)
Plan study sessions and hours per session from total hours needed
Cost per serving from total ingredient cost and number of servings
Most used tools from our collection
Online calculators are web-based tools that perform mathematical calculations instantly without requiring software installation. Whether you're calculating percentages for discounts, working on financial calculations, solving math problems, or performing everyday computations, our free calculators provide accurate results in seconds.
Our collection of calculation tools eliminates the need for physical calculators or expensive software. These math calculators work directly in your web browser, making complex calculations accessible to everyone. From percentage calculations to mathematical computations, our tools handle everything you need for professional and personal calculations.
There are countless situations where calculators can save you time and ensure accuracy. Here are the most common use cases:
Our percentage calculator helps you calculate discounts, taxes, tips, markups, and percentage changes instantly. Whether you're shopping and want to know the sale price, calculating sales tax, or determining percentage increases or decreases, our calculator provides accurate results with clear explanations.
Financial calculations require precision. Our calculators help you compute interest rates, discounts, price changes, and other financial metrics accurately. Perfect for budgeting, shopping, business calculations, and financial planning.
From calculating tips at restaurants to figuring out sale prices, our calculators handle everyday mathematical problems quickly and accurately. No need to pull out a physical calculator or open a separate app—everything works right in your browser.
All our calculators are completely free to use. No signup required, no hidden fees, and no usage limits. Calculate as many times as you need.
Get instant results with high accuracy. All calculations happen in your browser, ensuring speed and reliability.
Our calculators are fully responsive and work perfectly on desktop computers, tablets, and mobile phones.
All calculations happen in your browser. No data is sent to servers, ensuring complete privacy and security.
Calculate exact age in years, months, and days
Calculate days between dates or add/subtract days
Calculate work hours and time differences
Convert time between different time zones
Resize, convert, and edit images online
Merge, split, and edit PDF files online
Using our free calculators is simple and straightforward. Each calculator has been designed with an intuitive interface that makes complex calculations easy:
All our calculation tools work entirely in your browser—no downloads, no installation, and no data is sent to external servers. This ensures both privacy and speed, making our calculators ideal for quick calculations whenever you need them.
Use our percentage calculator to find the sale price of a $100 item with a 25% discount: Enter 100 as the number, 25 as the percentage, select "％ Decrease", and calculate. Result: $75 (you save $25). This helps you verify sale prices and understand actual savings during shopping.
Use case: Shopping, sale price verification, budget planning
Calculate an 18% tip on a $50 restaurant bill: Use our percentage calculatorto find 18% of 50, which equals $9. The total bill would be $59. Our calculators make tipping calculations quick and accurate, eliminating mental math errors.
Use case: Restaurant tipping, service calculations
Use our simple calculator for everyday math: Calculate 150 + 75 - 30 = 195, or 25 × 4 = 100. The calculator handles addition, subtraction, multiplication, and division with instant results, perfect for homework, budgeting, and quick calculations.
Use case: Homework, everyday math, basic calculations
Yes! All our calculators are completely free to use. There's no registration required, no hidden fees, and no usage limits. You can calculate as many times as you need without any cost or restrictions. All calculations happen in your browser, ensuring complete privacy and speed.
No! All our calculators work entirely in your web browser. There's no software to download, no installation required, and no plugins needed. Simply visit our website, select a calculator, and start calculating immediately. The calculators work on any device with a modern web browser.
Yes, our calculators provide highly accurate results using standard mathematical formulas and algorithms. The scientific calculator offers 14 decimal places of precision, while other calculators provide appropriate precision for their calculations. All calculations are suitable for academic, professional, and everyday use.
No! All calculations happen locally in your browser. We don't store, transmit, or share any of your data. Your numbers, calculations, and results never leave your device, ensuring complete privacy and security. This makes our calculators safe for sensitive financial or personal calculations.
Yes! All our calculators are fully responsive and work perfectly on mobile devices, tablets, and desktop computers. The interfaces are optimized for touch screens, making it easy to use calculators on smartphones. Perfect for calculating on the go, whether you're shopping, studying, or working.
Our calculator collection includes tools for basic arithmetic (addition, subtraction, multiplication, division), percentage calculations (increases, decreases, discounts), advanced mathematics (trigonometry, logarithms, powers), and more. Each calculator is designed for specific calculation types, making it easy to find the right tool for your needs. Explore our calculator collection to see all available tools.
While our calculators handle most calculations seamlessly, there are a few limitations to be aware of: