Click Calculations
Plan timelines, budgets, and goals in one place. All tools run instantly in your browser—no sign-up required.
Filter tools by title or keywords—results update as you type.
Showing all 43 calculators.
Time & Countdown
Days From (or Until) a Date
Find how many days are between any two dates—or from today.
OpenAge Calculator
Enter a birthdate to see your age in years, months, and days.
OpenDays Until Your Birthday
Countdown with leap-year handling for Feb 29 birthdays.
OpenAnniversary Countdown
Preview the next few anniversaries for any meaningful date.
OpenHoliday Countdown (US)
See days remaining until major U.S. holidays.
OpenFlight Time Calculator
Estimate nonstop duration, arrival time, and time zone shifts between major airports.
OpenMoney & Planning
Paycheck Tax Calculator
Estimate take-home pay by state with federal, payroll, and state taxes.
OpenOvertime Pay Calculator
See total pay when overtime and double-time hours stack onto your shift.
OpenFreelancer Hourly Rate
Back into a sustainable freelance rate using income goals and billable hours.
OpenSalary ↔ Hourly
Convert yearly pay to hourly wages (and vice versa) with your schedule.
OpenLoan Calculator
Estimate payments and see principal versus interest by year.
OpenCar Loan Affordability
Find the maximum vehicle price your income can comfortably support.
OpenMortgage Planner
Check affordability, monthly costs, and an amortization schedule.
OpenDebt Payoff Calculator
Compare snowball and avalanche payoff timelines across all your debts.
OpenCredit Card Interest
Project interest charges while carrying a balance and test extra payments.
OpenCompound Interest
Model investment growth with recurring deposits and raises.
OpenSavings Goal
See the monthly deposit needed to reach a target with growth.
OpenSavings vs Investing
Compare bank interest against market returns using the same contributions.
OpenCurrency Converter
Convert between 30+ currencies with live-rate fallback support.
OpenInflation Adjuster
Compare the buying power of money across different years.
OpenTip Splitter
Quickly find tip amounts and per-person totals for the table.
OpenEvent Budget Planner
Forecast venue, catering, staffing, and contingency costs with per-guest totals for any event.
OpenConverters & Units
Unit Converter
Switch between length, weight, temperature, and volume measurements with precise factors.
OpenTime Zone Converter
Enter a city and instantly compare the time across world capitals—DST aware.
OpenCooking Measurement Converter
Translate cups, grams, ounces, and spoons with a water-based kitchen reference.
OpenFuel Economy Converter
Swap between MPG and liters per 100 km when comparing vehicle efficiency.
OpenSpeed Converter
Convert driving speeds between miles per hour and kilometers per hour.
OpenShoe Size Converter
Match US, UK, and EU shoe sizes for men's and women's charts side by side.
OpenClothing Size Converter
Find approximate international equivalents for common men's and women's apparel sizes.
OpenPet Age Converter
Translate cat and dog ages into human years (and back) with growth-stage context.
OpenHealth & Fitness
BMI Calculator
Check your body mass index and see a healthy weight range for your height.
OpenBMR & Calorie Needs
Estimate daily calories for maintenance, weight loss, or muscle gain using the Mifflin-St Jeor equation.
OpenBody Fat % Estimator
Approximate body fat percentage and lean mass from tape measurements using the U.S. Navy method.
OpenWater Intake Guide
Find a daily water target based on body weight, activity, and climate.
OpenMacros Calculator
Split your calorie goal into daily protein, carb, and fat targets for different training goals.
OpenEveryday Tools
Password Generator
Build strong random passwords with custom character sets and length.
OpenText Case Converter
Flip text to upper, lower, or title case without losing your formatting.
OpenHex ↔ RGB Color Converter
Translate design colors between hexadecimal and RGB with a live swatch preview.
OpenQR Code Generator
Turn any text or link into a downloadable QR code with adjustable size.
OpenWord & Character Counter
Track words, characters, sentences, and reading time while you draft or edit text.
OpenPDF to Word/Text Extractor
Extract plain text from PDFs in your browser and download it as a Word or TXT file.
OpenGrade Goal Calculator
See the GPA needed in remaining credits or the final exam score required to reach your target.
OpenMeal Planner & Portion Calculator
Scale proteins, sides, desserts, and drinks for any gathering based on adults, kids, and leftovers.
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