Everyday tools, done right.
Fast, free calculators and converters for money, time, health, and more — no sign-up, no clutter, just the answer.
Popular right now
The tools people reach for most.
Tip Calculator
Work out the tip and split the bill between any number of people.
Percentage Calculator
Find a percentage, percentage change, or percentage difference.
Age Calculator
Get your exact age in years, months, and days from any birth date.
BMI Calculator
Check your Body Mass Index and healthy weight range.
Password Generator
Generate strong random passwords, created locally on your device.
QR Code Generator
Turn any link or text into a downloadable QR code.
Currency Converter
Convert between world currencies with daily exchange rates.
Unit Converter
Every everyday unit conversion, in one place.
Mortgage Calculator
Estimate your monthly mortgage payment and total interest.
Home Affordability Calculator
See how much house fits your income and monthly budget.
Compound Interest Calculator
See how your savings grow with compound interest over time.
US Paycheck Calculator
Estimate your US take-home pay after federal taxes.
Instant results
No spinners, no waiting — every answer appears as you type.
Private by design
Your inputs are calculated locally and never stored on a server.
Works everywhere
A clean, fast experience on your phone, tablet, or desktop.
Always improving
New tools ship regularly — this is just the beginning.
All tools
Browse every tool by category, or use search to jump straight in.
Money & Finance
Tips, currency, and everyday money math.
Tip Calculator
Work out the tip and split the bill between any number of people.
Currency Converter
Convert between world currencies with daily exchange rates.
Mortgage Calculator
Estimate your monthly mortgage payment and total interest.
Home Affordability Calculator
See how much house fits your income and monthly budget.
Compound Interest Calculator
See how your savings grow with compound interest over time.
Budget Calculator (50/30/20)
Split your income into needs, wants, and savings.
Debt Payoff Calculator
Compare snowball vs. avalanche payoff strategies.
Car Loan Calculator
Estimate your monthly car payment and total interest.
Personal Loan Calculator
Calculate monthly payments on any personal loan.
Retirement Calculator
Project how your retirement savings could grow by retirement age.
Savings Goal Calculator
See how long it'll take to reach any savings goal.
Rent vs. Buy Calculator
Compare the true long-term cost of renting vs. buying.
Inflation Calculator
See what money from any year is worth today.
Net Worth Calculator
Add up what you own and owe to find your net worth.
Sales Tax Calculator
Find the tax amount and total price on any purchase.
Emergency Fund Calculator
See how big your emergency fund should be.
Debt-to-Income Ratio Calculator
Check your DTI ratio against typical lender thresholds.
Family Budget Planner
Build a full household budget with custom categories.
Student Loan Calculator
Calculate your monthly student loan payment.
Bill & Rent Splitter
Split rent or bills fairly between any number of people.
Time & Date
Ages, deadlines, countdowns, and date math.
Age Calculator
Get your exact age in years, months, and days from any birth date.
Days Between Dates
Count the exact days, weeks, and months between two dates.
Countdown Timer
Count down live to any future date and time.
Business Days Calculator
Add or subtract working days from any date.
Time Zone Converter
Compare the current time across multiple cities.
Time Duration Calculator
Add, subtract, or find the duration between times.
Week Number Calculator
Find the ISO week number for any date.
Deadline Planner
Break any deadline into clear milestone checkpoints.
Health & Wellness
Body metrics and everyday wellness tools.
BMI Calculator
Check your Body Mass Index and healthy weight range.
Sleep Calculator
Find the best bedtime or wake-up time based on sleep cycles.
Calorie Calculator
Find your daily calorie and macro targets.
Due Date Calculator
Estimate your due date and current week of pregnancy.
Body Fat Calculator
Estimate your body fat percentage from a few measurements.
Ideal Weight Calculator
Estimate a healthy target weight range for your height.
Weight Tracker
Log your weight over time and see your trend.
Water Intake Tracker
Track your daily water intake against your goal.
Running Pace Calculator
Calculate pace, time, or predict your race finish.
Heart Rate Zone Calculator
Find your heart rate training zones for workouts.
Unit Converters
Length, weight, temperature, and more.
Unit Converter
Every everyday unit conversion, in one place.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
Weight Converter
Convert kilograms, pounds, ounces, and stone instantly.
Length Converter
Convert meters, feet, inches, and miles instantly.
Height Converter
Convert height between feet/inches and centimeters.
Data Storage Converter
Convert bits, bytes, KB, MB, GB, and TB instantly.
Shoe Size Converter
Convert shoe sizes between US, UK, and EU.
Clothing Size Converter
Convert clothing sizes across US, UK, EU, and AU.
Digital & Text Tools
Writing, security, and browser-based utilities.
Word Counter
Count words, sentences, and reading time as you type.
Character Counter
Track character counts for tweets, bios, and platform limits.
Password Generator
Generate strong random passwords, created locally on your device.
QR Code Generator
Turn any link or text into a downloadable QR code.
Text Case Converter
Switch text between uppercase, lowercase, title case, and more.
JSON Formatter & Validator
Format, validate, and minify JSON instantly.
Image Resizer & Compressor
Resize and compress images privately in your browser.
Merge PDF Files
Combine multiple PDFs into one file, in your browser.
Math & Education
Percentages, fractions, and quick school math.
Career & Work
Paychecks, take-home pay, and work-related math.
US Paycheck Calculator
Estimate your US take-home pay after federal taxes.
UK Take-Home Pay Calculator
Estimate your UK salary after tax and National Insurance.
Work Hours Calculator
Add up your weekly work hours and gross pay.
Invoice Generator
Create a professional invoice and print it as a PDF.
Freelance Rate Calculator
Find the hourly rate you need to hit your income goal.
Salary to Hourly Converter
Convert between annual salary and hourly pay.
Overtime Pay Calculator
Calculate your total pay including overtime hours.
PTO Accrual Calculator
Track how much paid time off you've earned.
Commute Cost Calculator
See the true yearly cost of your daily commute.
IR35 Calculator
Compare contractor take-home pay inside vs. outside IR35.
Shopping & Deals
Discounts, sales, and smarter spending.
Food & Cooking
Recipes, kitchen conversions, and meal planning.
Weekly Meal Planner
Plan a full week of meals in one simple grid.
Grocery Budget Calculator
Estimate a fair grocery budget for your household size.
Cooking Measurement Converter
Convert cups, tablespoons, and grams for common ingredients.
Recipe Scaler
Resize any recipe's ingredients to a new serving size.
Cooking Time & Temperature Converter
Convert oven temperatures and adjust cooking times.
Air Fryer Converter
Convert any oven recipe to air fryer time and temperature.
Home & Garden
Renovation, energy costs, and household projects.
Square Footage Calculator
Calculate room area for flooring, paint, and more.
Paint Calculator
Find out how much paint your room actually needs.
Appliance Energy Cost Calculator
See what it really costs to run any appliance.
Moving Cost Calculator
Estimate your total moving budget before moving day.
Room Layout Calculator
Check whether your furniture will actually fit.
Travel & Transport
Trip costs, fuel, and travel planning.
EV Charging Cost Calculator
Calculate your EV's charging cost and cost per mile.
Gas Mileage Calculator
Calculate your car's real-world fuel economy.
Travel Time Calculator
Estimate trip duration from distance and speed.
Jet Lag Calculator
Get a plan to adjust faster after a long-haul flight.
Packing List Generator
Generate a packing checklist tailored to your trip.
Education
Grades, GPA, and student tools.
Planners & Trackers
Habits, bills, and everyday planning.
Expense Tracker
Log expenses by category and see where your money goes.
Subscription Tracker
See exactly how much your subscriptions cost you each month.
Habit Tracker
Track daily habits and build streaks that stick.
Bill Organizer
Keep every bill's due date in one organized list.
Printable Weekly Planner
Fill in and print a clean weekly schedule template.
Writing Tools
Reading time, readability, and word tools.
Family & Events
Weddings, chores, and family budgeting.