All tools

Calculate exact age in years, months, and days.

Work out the true cost of borrowing.

Count business days excluding holidays.

See how savings grow with compound interest.

Count days between two dates.

Estimate appliance running costs.

Estimate journey fuel costs.

Estimate take-home pay after tax.

Calculate loan repayments and interest.

Estimate monthly mortgage repayments.

Calculate miles per gallon and fuel economy.

Find percentages, increases, decreases, and reverse percentages.

Convert salary to hourly, daily, and monthly pay.

Estimate UK Stamp Duty Land Tax.

Split bills and calculate tips.

Estimate real estate transfer tax by US state.

Add or remove VAT from prices.

Count weekdays between dates.

See your age counted in days.

Set a simple countdown timer.

Count down to a future date.

Find overlapping times across time zones.

Focus with timed work and break cycles.

Track elapsed time with lap support.

Find the difference between two times.

Convert times across world time zones.

Count characters with and without spaces.

Convert between CSV and other formats.

Generate placeholder text for designs.

Preview Markdown as formatted HTML.

Create strong, random passwords.

Generate random names for people or characters.

Estimate how long text takes to read.

Deduplicate lines in a list or file.

Count sentences in any text.

Sort text lines A–Z or Z–A.

Switch between upper, lower, title, and more.

Count words, characters, sentences, and reading time.

Pretty-print XML documents.

Find your break-even point.

Convert between world currencies.

Estimate dividend income and multi-year returns.

See how inflation changes buying power.

Model long-term investment growth.

Estimate ISA savings growth (UK).

Estimate retirement pension pots.

Calculate profit margin and markup.

Measure return on investment.

Project Roth IRA growth with US limits.

Project savings with regular deposits.

Convert m², ft², acres, and more.

Convert MB, GB, TB, and more.

Convert miles, kilometres, and more.

Convert metres, feet, inches, and more.

Convert mph, km/h, and m/s.

Convert Celsius, Fahrenheit, and Kelvin.

Convert seconds, minutes, hours, and days.

Convert litres, gallons, cups, and more.

Convert kg, lb, oz, and more.

Flip a virtual coin.

Roll one or more dice.

Generate random colours with hex codes.

Pick a random country.

Generate random hex colour codes.

Generate random numbers in a range.

Generate secure random passwords.

Split people into random teams.

Invent unique usernames.

Estimate concrete volume.

Estimate decking boards and materials.

Estimate fencing panels and posts.

Estimate flooring materials.

Estimate gravel or aggregate volume.

Estimate how much paint you need.

Estimate roofing materials.

Estimate tiles for floors and walls.

Estimate wallpaper rolls needed.

Encode and decode Base64 strings.

Generate MD5, SHA-1, and SHA-256 hashes.

Pretty-print and tidy JSON.

Check JSON for syntax errors.

Test regular expressions live.

Convert Unix timestamps to dates.

Encode and decode URL components.

Generate UUIDs instantly.

Calculate Body Mass Index from height and weight.

Estimate body fat percentage.

Estimate daily calorie needs.

Calculate protein, carbs, and fat targets.

Find ideal bedtimes and wake times.

Estimate daily water needs.