Calculators

Percentages, dates, money and everyday maths, with the formula shown.

Age CalculatorEnter a date of birth to get the exact age today, or change the second date to find the age on any other day.
Compound Interest CalculatorEnter a starting amount, a monthly contribution, the interest rate and the number of years to see how your money grows.
Date CalculatorCount the days between two dates, or find the date that is a number of days, weeks, months or years before or after another.
Discount CalculatorEnter a price and a discount to see what you pay and what you save. Got two prices instead? The second box tells you the percentage off.
Hours CalculatorEnter a start and end time to see the hours worked. Add a break, more periods for a whole week, and an hourly rate to see the pay.
Loan CalculatorEnter the amount, interest rate and term to see your monthly payment, the total interest and how the balance goes down year by year.
Mortgage CalculatorEnter the home price, your down payment, the interest rate and the term to see the monthly payment and the total cost of the mortgage.
Percentage CalculatorSolve the three everyday percentage questions. Type in any row and the answer and formula appear as you type.
Rule of Three CalculatorEnter three known values and get the missing fourth one. Choose Inverse when one quantity goes down as the other goes up.
Tip CalculatorEnter the bill, pick a tip percentage and the number of people to see the tip, the total and what each person pays.
VAT CalculatorChoose whether to add or remove VAT, enter the price and pick the rate. You get the price without VAT, the VAT itself and the total.
Week NumberSee which week of the year it is today, find the week number of any date, or look up the dates of a given week.
Working Days CalculatorCount the working days between two dates, or find the date a number of working days from now. Set the days you work and add your holidays.