Utilities Calculators
This category is the digital toolbox: small, sharp instruments for everyday computing and productivity jobs. Count characters words and sentences, convert text case, strip duplicate lines, and clean up pasted formatting. Generate secure passwords and check their strength, encode and decode base64 or URL strings, hash text, and convert colors between HEX RGB and HSL. Web and productivity helpers live here too: QR code readers and generators, timezone and Unix timestamp converters, stopwatch and countdown timers, random pickers for raffles and teams, and file-size or data-unit converters. Like every tool on the site they run entirely in your browser, which matters more here than anywhere: your passwords and pasted text never leave your device. No accounts, no uploads, no waiting. Pick the job, get it done, and get on with your day.
32 free utilities calculators. Every tool runs instantly in your browser with the formula shown, a worked example, and answers to common questions.
Age Exact does calendar arithmetic: counting days, adding intervals, and finding where dates fall in the week or year.
Area Calc uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.
Base Converter converts a measurement from one unit to another using exact conversion factors.
Date Add does calendar arithmetic: counting days, adding intervals, and finding where dates fall in the week or year.
Dice Roller generates something unpredictable: numbers, passwords, text or codes.
Gcd Lcm works with pure number theory and discrete math: the exact, integer side of mathematics.
Lorem Ipsum generates something unpredictable: numbers, passwords, text or codes.
Password Gen generates something unpredictable: numbers, passwords, text or codes.
Prime Check works with pure number theory and discrete math: the exact, integer side of mathematics.
Random Name generates something unpredictable: numbers, passwords, text or codes.
Ratio Simplifier works with pure number theory and discrete math: the exact, integer side of mathematics.
Rounding Calc works with pure number theory and discrete math: the exact, integer side of mathematics.
Salary Biweekly converts pay between time periods so salaries, hourly wages and freelance rates can be compared apples to apples.
Salary Hourly converts pay between time periods so salaries, hourly wages and freelance rates can be compared apples to apples.
Unit Converter converts a measurement from one unit to another using exact conversion factors.
Volume Calc uses the classic geometry formulas: area measures the surface something covers, volume measures the space it fills.