Useful tools for everyday life.
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Basic Calculator
Add, subtract, multiply and divide. Works offline once the page has loaded.
Percentage Calculator
Calculate a percentage, find what percentage one number is of another, or work out percentage change.
Results are rounded to a maximum of 6 decimal places. No data is sent to a server.
Age Calculator
Find your exact age in years, months and days, and see when your next birthday is.
Your dates are processed on your device and are not uploaded. For birthdays on 29 February, the next birthday is shown as 1 March in non-leap years.
BMI Calculator
Calculate adult Body Mass Index using metric or imperial measurements.
For adults aged 20 and over. BMI is a screening measure, not a diagnosis. It does not distinguish muscle from body fat and may not be suitable during pregnancy. Some ethnic groups have different risk thresholds. For children and teenagers, use an age- and sex-specific BMI assessment.
Stopwatch
Time activities, pause and resume, and record lap splits.
Displays hours:minutes:seconds.hundredths. Timing continues while the page remains open, including when Safari is briefly in the background. Closing or reloading the page resets the stopwatch.
Unit Converter
Convert everyday measurements instantly. No sign-up or internet connection needed after loading.
Conversions use internationally defined factors where available. UK imperial and US liquid gallons are listed separately. Results are rounded for display.
Countdown Timer
Set a duration, pause and resume, or reset the timer.
The timer uses actual elapsed time and catches up when you return to this tab. Keep Safari open for the completion alert. iPhone background suspension may prevent sound or alerts until you return. Closing or reloading resets the timer.
Word Counter
Count words, characters, sentences and paragraphs as you type. Your text stays in your browser.
Words are counted as non-whitespace groups; sentences are estimated using . ! ? punctuation; paragraphs are blocks separated by blank lines. Reading time assumes 200 words per minute. Results may vary for abbreviations and some languages. Text is processed locally and not uploaded.
Password Generator
Create strong random passwords directly on your device, without accounts or subscriptions.
Uses your browser’s secure random-number generator. Every selected character category is included at least once. Passwords are not uploaded or saved by this tool. Copied passwords may remain in your clipboard; avoid sharing them. Use a password manager for important accounts. Length and character variety help, but no password is guaranteed unbreakable.
Tip Calculator
Calculate a tip and split a bill fairly. Amounts are shown in pounds sterling (£).
Results update as you type. Each person's share is rounded to the nearest penny for display; when a bill cannot be divided exactly into pennies, actual payments may differ by 1p. Tip is calculated on the entered bill amount.