🧮 Calculators

Free Calculators

Estimate pay and loan payments, compare dates and time zones, or convert units. Salary and tax tools use stated assumptions; financial decisions should be checked against official documents.

Online Tools

Use in your browser

🎂Age CalculatorCalculate exact age from a date of birth

📅Date Countdown CalculatorCalculate days until or since a target date

🏢Business Day CalculatorCount working days between two dates

🌎World Time ConverterConvert a date and time between major cities

🕒World Clock ComparisonCompare the current time across multiple cities

🤝Meeting Time FinderFind meeting times that work across time zones

👟Shoe Size ConverterConvert KR, US, UK, and EU shoe sizes

💰U.S. Take-Home Pay CalculatorEstimate take-home pay using 2026 federal income tax and FICA rules

🏦Loan Payment CalculatorEstimate monthly loan payments and total interest

％Percentage CalculatorCalculate percentages, discounts, ratios, and changes

📏Unit ConverterConvert length, weight, area, volume, data, and temperature

🧾Sales Tax CalculatorAdd sales tax to a price or extract it from a tax-inclusive total

📅Shift Work Calendarbuild a monthly calendar from a repeating shift pattern

⚖️BMI CalculatorCalculate body mass index from height and weight

FAQ

Q.Is the take-home pay result an exact paycheck?⌄

No. Filing details, benefits, withholding, and local rules can change the amount. Review the year and sources on the calculator page.

Q.Are public holidays included in business-day counts?⌄

The current business-day tool handles selected weekend rules, not a verified holiday calendar for every country.