The tools you
need for decisions
that matter.
Last updated: April 2025
Mortgage, salary take-home, VAT, BMI, savings goals, debt payoff, retirement — 16 free calculators, instantly accurate, completely private. No account. No paywall.
Start with Mortgage Calculator →
Finance & Money Calculators
Monthly payments, total interest, and lifetime cost — in seconds. Supports USD, GBP and EUR.
Open Calculator →How much to save each month to hit any target by any date, with compound interest calculated.
Open Calculator →Monthly cost and total interest for any loan — car, personal, or credit line.
Open Calculator →Split any restaurant bill fairly across any number of people, with tipping guidance for USA and Europe.
Open Calculator →Estimate your income tax liability for the USA and UK. Currently in development.
Health & Wellness Calculators
Body Mass Index with healthy weight range, category, and context. Metric and imperial supported.
Open Calculator →Your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor equation — the clinical standard.
Open Calculator →Exact age in years, months and days. Days between any two dates. Countdown to any event.
Open Calculator →Planning & Tax Calculators
Add or remove VAT at any UK or EU rate. Supports all 27 EU member state rates plus UK standard and reduced.
Open Calculator →Net pay after UK income tax, National Insurance, and pension — or US federal + FICA. 2024/25 rates.
Open Calculator →How much you need to retire using the 4% rule. Project your fund growth with monthly contributions.
Open Calculator →What is £100 from 1990 worth today? Calculate purchasing power across any time range.
Open Calculator →Snowball vs avalanche — see which strategy pays off your debts fastest and costs less in total interest.
Open Calculator →Three modes: what is X% of Y, X is what % of Y, and percentage change between two numbers.
Open Calculator →More Free Tools
Convert between 15 major currencies including USD, GBP, EUR, JPY, AUD, CAD, CHF and more.
Open Calculator →US Navy method body fat percentage using neck, waist and hip measurements. Metric and imperial.
Open Calculator →Next period date, ovulation window, and fertile days based on your average cycle length.
Open Calculator →