Utility Tools
Calculate dates, units, ages, tips, discounts, random numbers, and everyday values.
What you can do with these tools
Use these tools for quick personal or work calculations where a spreadsheet would be slower.
Utility outputs are immediate browser calculations intended for fast reference.
Utility tools
- Age Calculator - Calculate exact age from a birth date in years and days.
- Antilog Calculator - Calculate an antilogarithm using base 2, 10, e, or a custom base.
- Area Converter - Convert area units such as square meters, acres, and square feet.
- BMI Calculator - Calculate body mass index from weight and height.
- Business Days Calculator - Count weekdays between two dates for work planning.
- Date Difference Calculator - Calculate days, weeks, months, and years between two dates.
- Days Until Calculator - Calculate how many days remain until a target date.
- Discount Calculator - Calculate sale price and savings from a discount percentage.
- Length Converter - Convert length units such as meters, feet, inches, and miles.
- Percentage Calculator - Calculate percentages from simple text like 25 of 200 or 15% of 80.
- Random Number Generator - Generate random integers between a selected minimum and maximum.
- Speed Converter - Convert speed units such as km/h, mph, knots, and meters per second.
- Temperature Converter - Convert Celsius, Fahrenheit, and Kelvin temperatures.
- Time Duration Calculator - Convert hours, minutes, and seconds into total duration units.
- Tip Calculator - Calculate tip amount and split totals across people.
- Volume Converter - Convert volume units such as liters, gallons, cups, and milliliters.
- Volume Flow Rate Converter - Convert volumetric flow rates between metric and imperial units.
- Weight Converter - Convert weight units such as kilograms, pounds, grams, and ounces.
- ZIP Creator - Combine multiple files into a ZIP archive locally in your browser.
How to choose a tool
- Open the tool that matches the source file, text, or calculation you already have.
- Review the input rules and free daily limit on the tool page.
- Run the tool, then check the output before sharing, publishing, or replacing an original file.