Choose a utility by the result you need
Start with the search box or task filters above. When two tools look similar, compare the input and result to check below before opening a tool.
Estimate an amount
Separate take-home pay, loan payments and tips: each calculation needs different inputs.
Check the result: Review amounts, periods, rates and assumptions on the tool page; confirm with an authoritative source before a financial decision.
Calculate a measure or convert units
Enter height and weight for BMI; convert across unit categories or choose °C, °F or K for temperature.
Check the result: Check the input and output units; BMI is a reference measure.
Look up dates and local information
Calculate age and birthdays, view a lunar date, count down to a holiday, find a local code or inspect an IP address.
Check the result: Confirm the selected date, place name or IP; IP location is only approximate.
Create something to reuse
Draft a CV, write a number in Vietnamese words, make dot variants for a personal Gmail address or pick an entry from a list.
Check the result: Preview the export, number wording, address or entry list before copying or saving.
Create, open or check a file
Create a ZIP from files or a folder, extract files from a ZIP, or review signals and reports for a suspicious file.
Check the result: Review the file list after archiving or extracting. For a suspicious file, read the lookup and upload-consent steps on the scanner page.
Check a connection or keyboard
Measure download speed on the current connection, or see which key presses the browser detects.
Check the result: Repeat under similar conditions to compare results; for a keyboard, test the specific key causing trouble.