Free Online Tools & Calculators

Browse all 83 free tools.

Length Converter - Convert between meters, feet, inches, miles, kilometers and other length units instantly.
Weight Converter - Convert between kilograms, pounds, ounces, grams and other weight units.
Temperature Converter - Convert between Celsius, Fahrenheit, and Kelvin temperature scales.
Volume Converter - Convert between liters, gallons, cups, milliliters and other volume units.
Area Converter - Convert between square meters, square feet, acres, hectares and other area units.
Speed Converter - Convert between mph, km/h, m/s, knots and other speed units.
Currency Converter - Convert between world currencies with live exchange rates updated regularly.
Percentage Calculator - Calculate percentages, percentage change, and percentage difference with ease.
BMI Calculator - Calculate your Body Mass Index and understand what it means for your health.
Tip Calculator - Calculate tips for restaurants, services, and split bills easily among friends.
Loan Calculator - Calculate monthly payments, total interest, and amortization schedules for any loan.
Mortgage Calculator - Calculate mortgage payments including principal, interest, taxes, and insurance.
Word Counter - Count words, sentences, and paragraphs in your text. Perfect for essays and content writing.
Character Counter - Count characters with and without spaces. Great for social media posts and SMS.
QR Code Generator - Create QR codes for URLs, text, contact info, WiFi networks, and more. Download as PNG or SVG.
PDF Merge & Split - Combine multiple PDFs into one or split a PDF into separate pages. 100% private - files never leave your browser.
Calorie Calculator - Calculate your daily calorie needs based on age, weight, height, and activity level.
Compound Interest Calculator - Calculate compound interest and see how your investments grow over time.
Time Zone Converter - Convert times between different time zones around the world instantly.
Password Generator - Generate strong, secure passwords with customizable length and character options.
Password Strength Checker - Check how strong your password is and get tips to improve it.
Encrypt Text - Encrypt your text messages with a password for secure communication.
Decrypt Text - Decrypt text messages that were encrypted with a password.
Pomodoro Timer - Boost productivity with the Pomodoro Technique. Work in focused intervals with timed breaks.
Meditation Timer - A peaceful timer for meditation and mindfulness practice with gentle chime notifications.
Typing Test - Test and improve your typing speed with randomized passages. Track WPM and accuracy.
Retirement Simulator - Visualize your retirement journey with an animated simulation of your savings over time.
Credit Card Payoff Calculator - Calculate how long it will take to pay off your credit card balance and how much interest you will pay.
Credit Card Interest Calculator - Calculate how much interest you will pay on your credit card balance over time.
Balance Transfer Calculator - Find out if transferring your credit card balance to a new card will save you money.
Credit Card APR Calculator - Calculate the effective APR on your credit card based on your balance and interest charges.
Income Tax Calculator - Calculate your estimated federal income tax based on your income, filing status, and deductions.
Business Tax Calculator - Estimate your business taxes including corporate tax, self-employment tax, and quarterly estimates.
Life Insurance Needs Calculator - Calculate how much life insurance coverage you need to protect your family and meet financial obligations.
Income Replacement Calculator - Calculate how much coverage you need to replace your income and protect your dependents.
Final Expense Estimator - Estimate funeral costs, burial expenses, and end-of-life expenses to help plan ahead.
Auto Insurance Cost Estimator - Estimate your auto insurance premium based on your vehicle, driving history, and coverage needs.
Auto Insurance Coverage Calculator - Determine how much auto insurance coverage you need based on your assets, vehicle, and risk factors.
Payment Processing Calculator - Calculate your actual monthly credit card processing costs based on volume, rates, and fee structures.
Business Loan Calculator - Calculate monthly payments, total interest, and compare different business loan options.
Payroll Cost Calculator - Calculate the true cost of employees including salary, taxes, benefits, and overhead.
Business Insurance Estimator - Estimate your business insurance needs and approximate costs based on your industry and size.
Debt-to-Income Calculator - Calculate your debt-to-income ratio to understand your financial health and loan eligibility.
Debt Avalanche vs Snowball Tool - Compare debt avalanche and snowball payoff strategies to find which saves you more money and time.
Debt Payoff Calculator - Calculate how long it will take to pay off your debt and how much interest you will pay.
Debt Consolidation Calculator - Compare your current debts to a consolidation loan to see if consolidating saves you money.
Credit Score Simulator - See how different actions like paying down debt, opening new accounts, or late payments affect your credit score.
Credit Utilization Calculator - Calculate your credit utilization ratio and see how it impacts your credit score.
Credit Repair Estimator - Estimate how long it will take to repair your credit and what steps to prioritize.
Bankruptcy Calculator - Evaluate whether bankruptcy might be an option and compare Chapter 7 vs Chapter 13.
Sleep Cycle Calculator - Find the best times to wake up or go to sleep based on 90-minute sleep cycles.
Sleep Debt Calculator - Track your cumulative sleep deficit and see how much recovery sleep you need.
Biological Age Calculator - Discover your biological age based on lifestyle factors. A fun, quiz-style assessment of your real age.
Life Expectancy Calculator - Estimate your life expectancy based on health, lifestyle, and family history factors.
Body Fat Percentage Calculator - Estimate your body fat percentage using the U.S. Navy method with simple measurements.
Ideal Weight Calculator - Find your ideal weight range using multiple scientific formulas like Devine, Robinson, and Miller.
Lean Body Mass Calculator - Calculate your lean body mass (fat-free mass) to track muscle and fitness progress.
Waist-to-Hip Ratio Calculator - Calculate your waist-to-hip ratio to assess health risks based on body fat distribution.
Body Surface Area Calculator - Calculate your body surface area using the Du Bois formula, commonly used for medical dosing.
One Rep Max Calculator - Estimate your one-rep max from submaximal lifts using proven strength formulas.
Heart Rate Zone Calculator - Calculate your heart rate training zones for fat burn, cardio, and peak performance.
Calories Burned Calculator - Estimate calories burned by activity type, duration, and body weight.
Pace Calculator - Convert between pace and speed for running, cycling, and swimming.
VO2 Max Estimator - Estimate your cardiovascular fitness level with VO2 max calculations.
Health Insurance Cost Estimator - Estimate health insurance premiums based on age, location, and coverage tier.
Out-of-Pocket Cost Calculator - Estimate your annual out-of-pocket medical costs based on your health profile.
HSA/FSA Savings Calculator - Calculate your tax savings from Health Savings Accounts and Flexible Spending Accounts.
Macro Calculator - Calculate your daily protein, carbs, and fat needs based on your goals.
Protein Intake Calculator - Calculate your daily protein needs based on weight, activity level, and goals.
Water Intake Calculator - Calculate your daily water needs based on weight, activity, and climate.
Intermittent Fasting Calculator - Calculate your eating windows for popular intermittent fasting schedules.
Keto Macro Calculator - Calculate your ideal macros for the ketogenic diet.
Due Date Calculator - Estimate your baby's due date from your last menstrual period or conception date.
Pregnancy Weight Gain Calculator - Calculate healthy weight gain ranges by trimester based on your pre-pregnancy BMI.
Ovulation Calculator - Predict your fertile window and ovulation date to help plan pregnancy.
Baby Growth Percentile Calculator - Plot your baby's weight and height on WHO growth charts to see their percentile.
Rent vs Buy Calculator - Compare the true costs of renting versus buying a home to make the right decision for your situation.
Home Affordability Calculator - Calculate how much house you can afford based on your income, debts, and down payment.
Closing Cost Calculator - Estimate your home closing costs including lender fees, title insurance, taxes, and more.
Rent Calculator - Calculate how much rent you can afford based on your income using the 30% rule and other methods.
Airbnb Rental Income Calculator - Estimate your potential Airbnb rental income and cash flow based on nightly rates and occupancy.
Cap Rate Calculator - Calculate the capitalization rate for real estate investments to compare property performance.
Cash-on-Cash Return Calculator - Calculate your cash-on-cash return to measure the annual return on your real estate investment.