Calculators
Quick, free calculators for everyday sums: VAT, tips and bill splitting, loans and savings, pay, fuel, paint, recipes, BMI and unit conversions, set up for UK pounds, miles and pints. Learn more
BMI Calculator
Work out your BMI in metric or imperial, with your healthy weight range.
Compound Interest Calculator
See savings grow year by year with compound interest, deposits and inflation.
Discount Calculator
Find the sale price, stack extra discounts correctly or work back to the original.
Fuel Cost Calculator
Cost a journey from mpg and pence per litre, and split it between passengers.
GPA/Grade Calculator
Calculate your GPA on the 4.0 scale, including weighted and cumulative GPA.
Loan/Mortgage Calculator
Monthly payments, total interest and overpayment savings on a mortgage or loan.
Measurement Converter
Convert metric, UK imperial and US units across ten types of measurement.
Paint/Wallpaper Coverage
Work out the paint tins or wallpaper rolls a room needs.
Percentage Calculator
Five everyday percentage sums, including reverse percentages, with working.
Pregnancy Due Date Calculator
Estimated due date, weeks pregnant and key appointment dates.
Recipe Scaler & Unit Converter
Scale a recipe to any number of servings and convert cups to grams.
Rule of 72 Doubling Calculator
How long money takes to double, or the rate needed to double it.
Salary/Wage Calculator
Convert pay between hourly, daily, weekly, monthly and yearly figures.
Savings Goal Calculator
How much to save each month for a goal, or how long it will take.
Split Bill Calculator
Split a bill evenly or by what each person had, with service charge.
Tip Calculator
Work out a tip and each person’s share, with optional rounding up.
Unit Price Comparison
Compare up to four products by price per kilo, litre or item.
VAT/Sales Tax Calculator
Add or remove UK VAT at 20%, 5% or any rate.
Free everyday calculators for money, home and life
These calculators answer the sums that come up week to week, and they're built around how things work in the UK. The Fuel Cost Calculator works with miles per gallon and the pence-per-litre price on the forecourt sign. The VAT Calculator uses the 20% and 5% rates and shows why the VAT in a price is a sixth, not a fifth. The Salary Calculator converts pay between hourly, monthly and yearly figures and checks it against the National Living Wage. Out for a meal? The Split Bill Calculator shares out starters and the service charge fairly, and the Tip Calculator rounds everyone up to a tidy amount.
For bigger decisions, the Loan & Mortgage Calculator shows your balance year by year and how much overpaying would save, the Compound Interest Calculator shows savings growing with regular deposits and inflation, and the Savings Goal Calculator tells you what to put aside each month. Around the house, the Paint & Wallpaper Calculator works out which tins and how many rolls to buy, the Recipe Scaler resizes a recipe and turns cups into grams, and the Unit Price Calculator finds the best value on the supermarket shelf. Every calculation runs in your browser and nothing you type is sent anywhere.
Questions and answers
- What's the difference between the Compound Interest Calculator and the Savings Goal Calculator?
- They answer opposite questions. The Compound Interest Calculator starts from what you'll put in and shows what you'll end up with, year by year. The Savings Goal Calculator starts from the amount you want and tells you how much to save each month to reach it by a date, or how long it will take at the amount you can afford.
- Should I use the Tip Calculator or the Split Bill Calculator?
- Use the Tip Calculator when everyone is paying an equal share: enter the bill, the tip and the number of people. Use the Split Bill Calculator when people ordered different amounts, as it adds a fair share of anything you shared and divides the service charge in proportion to what each person had.
- Why does the VAT Calculator say the VAT in £120 is £20, not £24?
- Because the 20% was added to the price before VAT, not to the final price. £100 plus 20% is £120, so taking 20% off £120 gives the wrong answer. The VAT in a VAT-inclusive price at 20% is one sixth of it. The Percentage Calculator's reverse mode uses the same idea for any price rise or discount.
- Does the Salary Calculator show my take-home pay?
- No, it converts gross pay, before tax, between periods, and works out the full-time-equivalent salary for part-time hours. Income Tax, National Insurance, pension contributions and student loan repayments are deducted from these amounts, so what reaches your bank account will be lower.
- Do the money calculators work in other currencies?
- Yes. They default to pounds, but each money calculator has a currency menu with euros, dollars, rupees or no symbol at all. Your choice is remembered in this browser and used across all of them. The sums are the same whatever the currency, though UK-specific guidance, such as VAT rates and the minimum wage check, applies only in pounds.