Free online tools
that just work
Word counter, JSON formatter, password and QR code generators, loan, BMI, percentages and more. Everything runs in your browser, so nothing you type is uploaded. No sign-up, no limits.
UK tax & pay calculators
Now on our sister siteOur take-home pay, income tax, stamp duty, VAT, mortgage and savings calculators now live on Numbiqo, kept up to date with the 2026/27 rates.
All money calculators at Numbiqo →Everyday
Percentage Calculator
Work out percentages, increases, decreases and differences.
Open tool →Age Calculator
Work out your exact age in years, months, weeks and days from your date of birth.
Open tool →Date Difference Calculator
Count the days, weeks and months between any two dates.
Open tool →BMI Calculator
Calculate your Body Mass Index in metric or imperial (including stones).
Open tool →Calorie Calculator
Estimate your daily calorie needs (BMR and TDEE) for maintenance, loss or gain.
Open tool →Fuel Cost Calculator
Estimate the fuel cost of a journey from distance, economy and fuel price.
Open tool →Mileage Calculator
Work out mileage reimbursement, with HMRC 45p/25p rates built in.
Open tool →Unit Converter
Convert length, weight and temperature between common units.
Open tool →Time Calculator
Add or subtract times and durations, or find the hours between two times.
Open tool →Text Tools
Word Counter
Count words, characters, sentences and reading time as you type.
Open tool →Case Converter
Convert text to UPPER, lower, Title, Sentence, camelCase and more.
Open tool →Text Compare
Spot the differences between two blocks of text, line by line.
Open tool →Lorem Ipsum
Generate placeholder paragraphs, sentences or words on demand.
Open tool →Developer
JSON Formatter
Beautify, minify and validate JSON with clear error messages.
Open tool →Base64 Encode/Decode
Encode text to Base64 or decode it back, instantly.
Open tool →URL Encoder
Percent-encode or decode text for safe use in URLs.
Open tool →Hash Generator
Create SHA-256, SHA-1 and SHA-512 hashes of any text.
Open tool →QR Code Generator
Turn any link or text into a downloadable QR code.
Open tool →Password Generator
Generate strong, random passwords with custom rules.
Open tool →Common questions
Where did the UK tax calculators go?
They moved to our sister site, Numbiqo, which specialises in UK pay, tax and money calculators and keeps them updated every tax year. Old links redirect there automatically.
Can I use these outside the UK?
The money calculators default to the UK and include a country switch for the US, Canada, Australia, Ireland, New Zealand, Germany and France, changing the currency and tax rate.
Is my data private?
Every calculator runs in your browser. Nothing you type is sent to a server or stored.
Do I need to sign up or pay?
No. Every tool is free with no account and no limits. Ads keep the site running.