About CalculatorZone
Free, accurate online calculators trusted by people across the UK, US, Canada, Australia and Ireland.
Our Mission
CalculatorZone was built with one goal: to give everyone access to the same financial and health tools that were previously locked behind expensive software or professional consultations. Every calculator on this site is completely free, requires no sign-up, and works directly in your browser.
We cover mortgage payments, income tax, salary breakdowns, investment returns, BMI, and dozens more — all localised for the country you're in, using the correct tax rates, thresholds and currency for that region.
✅ Accuracy & Methodology
Every calculator is built using official government data and published tax tables. Our UK calculators use HMRC rates; our US calculators use IRS brackets; our Canadian calculators use CRA tables. We update our rates at the start of each tax year.
- ✓ Tax rates sourced directly from HMRC, IRS, ATO, CRA and Revenue Ireland
- ✓ Mortgage calculations use standard amortisation formulas
- ✓ Investment projections use compound interest principles
- ✓ Health calculations follow WHO and NHS guidelines
- ✓ All results are estimates — for financial decisions, always consult a qualified professional
What We Cover
💰 Finance
Mortgage, loan repayment, stamp duty, affordability and refinancing calculators
📊 Tax & Salary
Income tax, salary after tax, national insurance, pension and overtime calculators
📈 Investments
Compound interest, investment returns, dividend yield and ROI calculators
🏠 Property
Rental yield, buy-to-let, capital growth and property flipping calculators
❤️ Health
BMI, body fat, calorie intake and BMR calculators based on WHO guidelines
💼 Business
Profit margin, break-even, VAT and cashflow calculators for business owners
Available For
Why Trust Our Calculators
100+ Calculators
Covering every major financial and health calculation you need
5 Countries
Localised tax rates and currency for UK, US, CA, AU and IE
Kept Updated
Tax tables and rates updated annually from official sources
Important Disclaimer
All calculators on CalculatorZone provide estimates for informational purposes only. They do not constitute financial, tax, legal or medical advice. Results may vary based on your individual circumstances. Always consult a qualified professional — such as a financial advisor, accountant or doctor — before making financial or health decisions.
Get in Touch
Found an error in one of our calculators? Have a suggestion for a new one? We'd love to hear from you.
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