Free everyday calculators

Quick, honest answers to the money and life questions that come up all the time, with the working shown so you can see where the number comes from.

Loan Payment CalculatorMonthly payment, total interest and a year-by-year balance for any fixed-rate loan.Savings Growth CalculatorSee how a starting balance and monthly savings grow with compound interest.Discount and Sale Price CalculatorWork out the sale price, your savings, stacked discounts and tax.Tip and Bill Split CalculatorWork out the tip and split the bill fairly between any number of people.Days Between Dates CalculatorCount the days, weeks and weekdays between two dates.Age CalculatorYour exact age in years, months and days, plus days until your next birthday.BMI CalculatorBody mass index for adults, with a healthy weight range for your height.Fuel and Trip Cost CalculatorEstimate the fuel cost of a trip and split it between passengers.

Using these calculators well

A calculator is only as good as the numbers you give it. Before you rely on a result, check that your inputs match what a real quote or statement says: the interest rate should be the annual rate, the term in years, the price before tax or after. A small slip in an input becomes a big slip in an answer.

These tools give estimates for planning and comparison. They are not financial, medical or legal advice, and real lenders, banks and clinics may use slightly different rules. Everything runs in your browser, so the numbers you type stay on your device. If you want to understand the ideas behind the sums, our guides explain them in plain English.