United Kingdom ยท 2026/27
United Kingdom Calculators
United Kingdom Calculators, 2026/27. Calculators for life, money and tax. Free, accurate calculators for salary, tax, benefits, health and everyday life.
The UK tools model PAYE as your payslip applies it: income tax by band, National Insurance, student loan plans and workplace pension contributions, with Scottish rates handled where they differ. The tax pages follow the April to April tax year, and the take-home results reconcile against HMRC worked examples before anything goes live. Beyond pay, the set covers VAT, capital gains, Child Benefit and the charge that claws it back at higher incomes.
Family & Children
Work & Salary
Salary calculator See your take-home pay after income tax and contributions. 
Social security calculator Estimate employee and employer contributions. 
Hourly to salary calculator Convert between an hourly rate and an annual salary. 
Pay rise calculator How much of a raise you keep after tax and contributions. 
Overtime pay calculator Weekly pay with overtime at time and a half or double time. 
Minimum wage calculator Check your hourly pay against the minimum wage and see the gap. 
Salary inflation calculator See whether a pay rise beat inflation in real terms. 
Pro-rata salary calculator Scale a full-time salary to the hours you actually work, with monthly pay. 
Holiday entitlement calculator Statutory paid annual leave by country, pro-rated for your working pattern. 
Notice period calculator Statutory minimum notice an employer must give, by country and length of service. Taxes & Contributions
Housing & Property
Stamp duty calculator Work out the SDLT on a home in England and Northern Ireland. 
Mortgage calculator Repayments and amortisation for a home loan. 
Mortgage affordability calculator A rough property budget from your income and deposit. 
Mortgage overpayment calculator Interest saved and years cut by overpaying your mortgage. 
Cost to buy a home calculator Purchase taxes, fees and the total cash needed to buy. 
Square footage calculator Floor area from length and width, in square feet and square metres. 
Rent vs buy calculator Compare the real cost of renting against buying over the years you stay. 
Electricity cost calculator Estimate an electricity bill from the kWh used, the unit rate and the standing charge. 
Heating cost calculator Work out the cost of running heating over a season from its power and hours. 
Appliance running cost calculator See what a single appliance costs to run per day, month and year. 
Paint calculator Work out how many litres of paint a room needs from the wall area and coats. 
Flooring calculator Estimate the packs of laminate, vinyl or tiles a floor needs, with waste. 
Wallpaper calculator Count the rolls of wallpaper a room needs from its perimeter and height. 
Concrete calculator Work out the cubic metres of concrete and bags of dry mix a slab needs. 
Gravel calculator Estimate the volume, weight and bulk bags of gravel for an area and depth. 
Mulch calculator Find the cubic metres, litres and bags of mulch a garden bed needs. Health
BMI calculator Body mass index from your height and weight. 
Calorie calculator Daily calories to maintain, lose or gain weight. 
Ideal weight calculator A healthy weight range for your height. 
Due date calculator Estimate a pregnancy due date and how far along you are. 
Ovulation calculator Estimate ovulation day and your most fertile window. 
BMR calculator Basal metabolic rate, the energy you burn at rest. 
Body fat calculator Estimate body fat from tape measurements, the US Navy way. 
Protein intake calculator Daily protein target in grams for your weight and goal. 
Water intake calculator How much water to drink a day for your weight and activity. 
Child BMI calculator A child's BMI value to read against a growth-chart percentile for their age. 
Running pace calculator Pace per kilometre and per mile, and speed, from a distance and a time. 
Calories burned calculator Estimate the calories an activity burns from your weight and the time. 
Steps to km calculator Turn a step count into distance in kilometres and miles from your stride. Auto & Mobility
Fuel cost calculator Cost of a trip from distance, economy and price. 
Auto loan calculator Monthly payment and interest on a car loan. 
Car depreciation calculator Estimate what a car will be worth after several years of use. 
Lease vs buy calculator Compare the cost of leasing a car against buying and reselling it. 
Fuel economy converter Convert between mpg, litres per 100 km and km per litre. Finance & Credit
Capital gains tax calculator Estimate capital gains tax for individuals. 
Loan calculator Monthly repayments and total interest on a loan. 
Compound interest calculator Grow a balance with regular contributions. 
Savings goal calculator How long to reach a savings goal, with interest. 
Inflation calculator How prices and spending power change over time. 
Retirement savings calculator Project a retirement pot from regular saving, with employer match. 
Import duty and VAT calculator Customs duty, import VAT and the total landed cost. 
50/30/20 budget calculator Split your take-home pay into needs, wants and savings. 
Emergency fund calculator How big a safety net you need and how long to save it. 
Currency converter Convert between major currencies at dated reference rates. 
Markup calculator Set a selling price by marking a cost up by a percentage. 
Margin calculator Gross profit margin from a selling price and a cost. 
ROI calculator Return on investment as a total and an annualised percentage. 
Break-even calculator Units and revenue needed to cover fixed and variable costs. 
Simple interest calculator Interest charged on the principal alone, with the total value. 
APR vs APY calculator Turn a nominal APR into the effective APY for any compounding frequency. 
Credit card payoff calculator How long a fixed payment takes to clear a card, and the interest it costs. 
Debt snowball calculator Plan a smallest-balance-first payoff across several debts. 
Net worth calculator Add up assets and subtract debts to see what you are worth. 
Savings rate calculator Find the share of take-home pay you keep each month. 
FIRE number calculator Work out the pot that lets investments cover your spending. Everyday & Lifestyle
Percentage calculator Percentages, increases, decreases and differences. 
Date difference calculator Days, weeks and months between two dates. 
Age calculator Exact age in years, months and days from a birth date. 
Tip calculator Work out a tip and split the bill between people. 
Discount calculator Sale price and saving from a percentage off. 
Bill split calculator Split shared costs and see who pays whom. 
Unit converter Convert length, weight, volume, temperature and speed. 
Time duration calculator Add up days, hours, minutes and seconds into one total. 
GPA calculator Work out your grade point average on the 4.0 scale, weighted by credit hours. 
Final grade calculator Find the score you need on a final exam to reach a target overall grade. 
Reading time calculator Estimate how long a word count takes to read silently or aloud. 
Age gap calculator The exact age difference between two people from their birth dates. 
Day of the week calculator Find which day of the week any date fell on, such as the day you were born. 
Anniversary countdown calculator Days until the next anniversary of a wedding, birthday or any event. 
Dog age calculator Your dog's age in human years from the modern epigenetic formula. 
Cat age calculator Your cat's age in human years from the veterinary life-stage chart. 
Tipping by country calculator Customary restaurant tip for the country you are in, with the bill split. 
Stacked discount calculator Final price when discounts apply one after another, and the effective rate. 
Unit price calculator Compare two pack sizes by price per unit to find the better value.