Everyday calculators
Quick answers for money, health, travel and dates — from what a job offer pays after tax to how to split a restaurant bill. The numbers you type stay in your browser; nothing is saved or sent.
All calculators
BMI Calculator
Calculate your BMI with a visual gauge.
Take-Home Pay Calculator
Estimate net pay in the US, UK, France, Spain, Japan, Switzerland, Mexico, Argentina, Australia or Canada.
Discount Calculator
Work out a percentage or sale price.
Salary Calculator
Convert salary to hourly rate.
VAT Calculator
Add or remove VAT from a price.
Fuel Cost Calculator
Estimate the cost of a trip.
Recipe Scaler
Scale ingredients up or down.
Week Number Calendar
A calendar with ISO week numbers built in.
Age Calculator
Exact age in years, months and days, or the difference between any two dates.
Tip Calculator
Calculate the tip and split the bill.
Which tool do I need?
- Comparing a job offer, or checking your payslip Take-Home Pay Calculator →
- Turning an hourly rate into a yearly salary, or back Salary Calculator →
- Adding or removing VAT on a price or invoice VAT Calculator →
- Working out a sale price or a percentage Discount Calculator →
- Tipping and splitting a restaurant bill Tip Calculator →
- Checking your body mass index BMI Calculator →
- Exact age, or the days between two dates Age Calculator →
- Estimating the fuel cost of a road trip Fuel Cost Calculator →
- Cooking a recipe for more or fewer people Recipe Scaler →
- Someone said "week 34" and you need the dates Week Number Calendar →
How accurate are they?
The arithmetic calculators (VAT, discount, tip, fuel, recipes, dates) are exact. The take-home pay calculator is an estimate: it applies each country's published income-tax brackets and main social contributions (US, UK, France, Spain, Japan, Switzerland, Mexico, Argentina, Australia and Canada), but can't know every personal deduction, so use it to compare offers and check your payslip is in the right range, not for a tax return. BMI is a screening number, not a diagnosis; here's what it does and doesn't tell you.
Your numbers stay private
Salary, weight and birth dates are personal. Every calculation here is plain arithmetic that runs in your browser: nothing is sent to a server, and nothing is stored once you close the tab.
Related guides
Frequently asked questions
Are the take-home pay figures exact?
They're careful estimates based on each country's published tax brackets and main social contributions for the 2026 tax year (2026-27 for the UK and Australia). Personal deductions, credits and local taxes vary, so check official sources or your payslip for exact figures.
Is my salary or health data stored?
No. All calculations run in your browser. Nothing you enter is sent to a server or saved after you leave the page.
Which countries does the take-home pay calculator cover?
The US, the UK, France, Spain, Japan, Switzerland, Mexico, Argentina, Australia and Canada, with country-specific options such as filing status, student loans or 13th-month pay.
What week numbering does the week calendar use?
ISO 8601, used across Europe and much of the world: weeks start on Monday and week 1 is the week containing the year's first Thursday.