Online Calculator UKTax, Finance, Health & More Made Simple
Tax, VAT, benefits, finance, business, health, time, conversion and more — built for the UK. Free, accurate calculators using current UK tax year thresholds and HMRC rules.
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Finance
UK tax, VAT, PAYE, National Insurance & HMRC-aware calculators
- VAT Calculator
- Mortgage Calculator
- Payroll Calculator
Percentage
All percentage calculations
- Percentage Calculator
- Percentage Increase
- Reverse Percentage
Health
BMI, Body Fat & fitness calculators (NHS aligned)
- BMI Calculator
- Body Fat Calculator
- BMR Calculator
Math
Scientific & graphing calculators
- Scientific Calculator
- Graphing Calculator
- Matrix Calculator
Time
UK working hours, holiday entitlement & time calculations
- Age Calculator
- Date Difference
- Time Calculator
Conversion
Miles/km, stones/kg & UK-focused unit converters
- Currency Converter
- Length Converter
- Unit Converter
Business
UK small business & contractor calculators
- VAT Calculator
- ROI Calculator
- Tax Calculator
Specialised
UK benefits, compliance & niche calculators
- Area Calculator
- Statistics Calculator
- Physics Solver
Popular Calculators
Percentage Calculator
Calculate percentages, increases, and decreases
VAT Calculator
Calculate VAT on prices and amounts
Mortgage Calculator
Calculate mortgage payments and affordability
BMI Calculator
Calculate your Body Mass Index
National Insurance Calculator
Calculate UK National Insurance contributions
Stamp Duty Calculator
Calculate UK Stamp Duty Land Tax
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