Free Online Calculators & Tools

🍽️ Tip Calculator

Calculate tip amount and split bills between people instantly.

💵 Hourly to Salary Calculator

Convert any hourly wage to annual, monthly, weekly, and daily pay instantly.

⏰ Overtime Calculator

Calculate overtime pay for any number of extra hours worked above your standard 40-hour week.

🐷 Savings Goal Calculator

Find out how much to save each month to reach your financial goal by a target date.

📈 Compound Interest Calculator

See how your money grows over time with compound interest. Get a full year-by-year breakdown.

🤖 AI Tool ROI Calculator

Determine if your AI tool subscription is worth it by calculating ROI based on time saved.

☀️ Solar Panel Break-Even Calculator

Find out how many years it takes for solar panels to pay for themselves and estimate lifetime savings.

⚡ EV Cost Savings Calculator

Compare the total cost of owning an electric vehicle vs a gas car. See fuel savings and break-even timeline.

🏠 Mortgage Calculator

Calculate your monthly mortgage payment, total interest paid, and full repayment cost for any home loan.

💼 Freelancer Rate Calculator

Calculate the hourly rate you need to charge as a freelancer to meet your income goals and cover expenses.

💰 Net Worth Calculator

Calculate your net worth by subtracting your total liabilities from your total assets.

📈 Inflation Calculator

See how inflation erodes purchasing power over time and calculate the future value of today's money.

📱 Subscription Calculator

Search 63 popular services, add your subscriptions, and see exactly what you spend each month and year.

🏠 Rent Affordability Calculator

Find out if your rent is eating too much of your income using the 30% rule and see your ideal rent range.

🏡 Rent vs Buy Calculator

Compare the true long-term cost of renting vs buying a home, including opportunity cost of the down payment.

🧾 Tax Bracket Calculator

Calculate your take-home pay after income tax and National Insurance. Supports UK (England/Wales/NI + Scotland bands), US, Australia, Canada, India, and more.

💱 Currency Converter

Convert between 15 major currencies with live mid-market rates updated daily. Instant conversions and popular currency pairs.

💳 Loan Repayment Calculator

Calculate your monthly loan repayment, total interest, and full repayment schedule for any personal or car loan.

💧 Water Intake Calculator

Calculate your recommended daily water intake based on weight, activity level, and climate.

🏋️ One Rep Max Calculator

Estimate your one-rep max (1RM) for any lift using the Epley, Brzycki, or Lombardi formula.

🎯 Ideal Weight Calculator

Calculate your ideal body weight range using the Hamwi, Devine, and Miller formulas based on height and sex.

🔥 TDEE Calculator

Calculate your Total Daily Energy Expenditure and BMR. Get calorie targets for weight loss or gain.

⚖️ BMI Calculator

Calculate your Body Mass Index with metric or imperial units. See your BMI category and scale visualization.

🥗 Macro Calculator

Calculate your daily calories, protein, carbs, and fat targets based on your body stats, activity level, and goal.

📏 Body Fat Calculator

Estimate your body fat percentage using the US Navy tape method. Enter height, neck, and waist measurements for an instant result.

😴 Sleep Cycle Calculator

Find the best times to wake up or go to bed based on 90-minute sleep cycles. Wake up refreshed, not groggy.

🏃 Running Pace Calculator

Calculate your running pace, finish time, or distance. See projected race finish times for 5K, 10K, half marathon, and marathon.

🔥 Calories Burned Calculator

Calculate how many calories you burn during any activity using MET values, body weight, and duration.

🍺 Blood Alcohol Content (BAC) Calculator

Estimate your BAC with correct legal limits for your region — including UK Scotland (0.05%) vs England & Wales (0.08%). Widmark formula.

👶 Pregnancy Due Date Calculator

Calculate your pregnancy due date from your last menstrual period or IVF transfer date. See current week, trimester, and key milestones.

🔬 Food Nutrition Scanner

Check any food's calories, macros, Nutri-Score, and processing level. Search by name, scan a barcode, or enter nutrition manually.

⏱️ Reading Time Estimator

Estimate how long it takes to read or speak any number of words at different speeds.

📝 Word Counter

Count words, characters, sentences, and paragraphs instantly. Get reading and speaking time estimates.

🔤 Case Converter

Convert text between UPPER CASE, lower case, Title Case, Sentence case, camelCase, and snake_case.

📄 Lorem Ipsum Generator

Generate lorem ipsum placeholder text by paragraphs, sentences, or words. Free online dummy text generator.

🔢 Character Counter

Count characters, words, and lines in your text. Check Twitter, SMS, and meta description character limits instantly.

🔁 Text Repeater

Repeat any text a set number of times with your choice of separator. Free online text multiplier tool.

🔀 Reverse Text Generator

Reverse text character by character or word by word. Free online backwards text and mirror text generator.

🔗 URL Slug Generator

Convert any text into a clean URL slug for SEO-friendly web addresses. Free slug generator tool.

🔍 Keyword Density Checker

Calculate keyword density in any text. Check keyword frequency and percentage for SEO content optimisation.

√ Square Root Calculator

Calculate the square root, cube root, or any nth root of a number instantly.

🔢 Exponent Calculator

Calculate any base raised to any power (exponent). Supports decimal and negative exponents.

❕ Factorial Calculator

Calculate the factorial of any whole number from 0 to 12 instantly.

📊 Percentage Change Calculator

Calculate the percentage change between two numbers. Find increase or decrease as a percentage instantly.

% Percentage Calculator

Calculate percentages instantly — find X% of a number, percentage change, or increase/decrease by a percentage.

🔬 Scientific Calculator

Free online scientific calculator with sin, cos, tan, log, square root, and more. Supports degrees and radians.

½ Fraction Calculator

Add, subtract, multiply, and divide fractions. Simplifies results using GCD and shows mixed number form.

Ⅻ Roman Numeral Converter

Convert between integers and Roman numerals. Bidirectional converter with conversion steps shown.

💻 Binary to Decimal Converter

Convert between binary, decimal, and hexadecimal instantly. Three-way bidirectional number base converter.

🔤 Number to Words Converter

Convert numbers to English words. Useful for cheque writing, legal documents, and formal writing.

🎓 GPA Calculator

Calculate your college GPA on a 4.0 scale. Add courses, grades, and credit hours for instant results.

📊 Grade Calculator

Find the minimum exam score needed to reach your desired course grade. Enter current grade and exam weight.

☕ Coffee Cost Calculator

Find out how much you spend on coffee per year and whether switching to home brew would save you money.

🐾 Pet Food Calculator

Calculate how much your pet food costs per day, month, and year based on pack size and price.

🎨 Paint Calculator

Calculate how many litres of paint you need to cover walls and ceilings, accounting for doors and windows.

🟦 Tile Calculator

Calculate how many tiles you need for any floor or wall area, with a wastage buffer.

🎂 Age Calculator

Find your exact age in years, months, and days. See birthday countdown, zodiac sign, and total days lived.

🖼️ Wallpaper Calculator

Calculate how many rolls of wallpaper you need for any room, including a 10% waste buffer.

🏋️ Gym vs Home Gym Calculator

Compare the total cost of a gym membership vs building a home gym over 3, 5, or 10 years. Find your break-even point.

❤️ Love Calculator

Find out your love compatibility percentage! Enter two names for a fun, tongue-in-cheek compatibility score.

⛽ Fuel Cost Calculator

Calculate the fuel cost of any trip based on distance, fuel efficiency, and local fuel price.

🏗️ Concrete Calculator

Calculate the volume of concrete needed for any slab, footing, or pour. Get cubic metres, cubic yards, and number of bags.

📅 Age in Days Calculator

Find out exactly how many days old you are today. Also shows your age in weeks, months, and hours.

📆 Days Between Dates Calculator

Calculate the exact number of days, weeks, and months between any two dates instantly.

🌍 Time Zone Converter

Convert any date and time between 25+ world time zones instantly. Includes a live world clock for 6 major cities.