# Online Calculator

> Free UK tax and finance calculators


## Posts

- [Hello world!](https://onlinecalculatorsite.com/hello-world/): Welcome to WordPress. This is your first post. Edit or delete it, then start writing!

## Pages

- [Age Calculator](https://onlinecalculatorsite.com/age-calculator/): Exact age in years, months and days between two dates, plus how long until the next birthday.
- [Calorie Needs Calculator](https://onlinecalculatorsite.com/calorie-needs-calculator/): Daily energy use from your basal rate and how active you are — roughly what keeps your weight steady.
- [BMR Calculator](https://onlinecalculatorsite.com/bmr-calculator/): Basal metabolic rate — the energy your body uses at complete rest — using the Mifflin-St Jeor equation.
- [BMI Calculator](https://onlinecalculatorsite.com/bmi-calculator/): Body Mass Index from your height and weight, in metric or imperial, with the healthy weight range for your height.
- [Loan Repayment Calculator](https://onlinecalculatorsite.com/loan-repayment-calculator/): Monthly repayments on a personal loan, and what the borrowing costs in interest over the full term.
- [Compound Interest Calculator](https://onlinecalculatorsite.com/compound-interest-calculator/): What a lump sum and regular contributions grow to, with interest compounded monthly, quarterly or yearly.
- [Percentage Change Calculator](https://onlinecalculatorsite.com/percentage-change-calculator/): The percentage increase or decrease between two numbers, and the change that would take you back again.
- [Percentage Calculator](https://onlinecalculatorsite.com/percentage-calculator/): Work out a percentage of a number, what one number is as a percentage of another, or the change between two.
- [Online Calculator](https://onlinecalculatorsite.com/): Every calculator here runs in your browser. Nothing you type is sent anywhere, nothing is stored, and there is no sign-up.
- [State Pension Calculator](https://onlinecalculatorsite.com/state-pension-calculator/): Your State Pension based on qualifying years, measured against the full new State Pension.
- [Pension Calculator](https://onlinecalculatorsite.com/pension-calculator/): What your contributions actually cost you after tax relief, and what the pot builds to.
- [ISA Calculator](https://onlinecalculatorsite.com/isa-calculator/): How much of your ISA allowance is left, and what a pot grows to over time.
- [VAT Calculator](https://onlinecalculatorsite.com/vat-calculator/): Add VAT to a net figure or strip it out of a gross one, at the standard or reduced rate.
- [Council Tax Calculator](https://onlinecalculatorsite.com/council-tax-calculator/): Your council tax by band, worked out from your local authority Band D rate.
- [Inheritance Tax Calculator](https://onlinecalculatorsite.com/inheritance-tax-calculator/): Inheritance Tax on an estate, after the nil-rate band and the residence nil-rate band.
- [Corporation Tax Calculator](https://onlinecalculatorsite.com/corporation-tax-calculator/): Corporation Tax on company profits, including marginal relief between the small profits rate and the main rate.
- [Capital Gains Tax Calculator](https://onlinecalculatorsite.com/capital-gains-tax-calculator/): Capital Gains Tax on a disposal, after the annual exempt amount.
- [Dividend Tax Calculator](https://onlinecalculatorsite.com/dividend-tax-calculator/): Tax on dividend income, after the dividend allowance and alongside your other earnings.
- [Mortgage Calculator](https://onlinecalculatorsite.com/mortgage-calculator/): Monthly repayments, total interest and the full cost of a mortgage across its term.
- [Stamp Duty Calculator](https://onlinecalculatorsite.com/stamp-duty-calculator/): Stamp Duty Land Tax on a property purchase, including first-time buyer relief and the additional property surcharge.
- [Student Loan Repayment Calculator](https://onlinecalculatorsite.com/student-loan-calculator/): What you repay each year on Plan 1, Plan 2, Plan 4, Plan 5 or a postgraduate loan.
- [National Insurance Calculator](https://onlinecalculatorsite.com/national-insurance-calculator/): Class 1 employee National Insurance on your earnings, shown threshold by threshold.
- [Income Tax and National Insurance Calculator](https://onlinecalculatorsite.com/income-tax-calculator/): Work out income tax and National Insurance on any salary, with the rate that applies to each slice of it.
- [Take-Home Pay Calculator](https://onlinecalculatorsite.com/take-home-pay-calculator/): See what actually reaches your bank account after income tax, National Insurance, pension and student loan.
- [Home & Building Calculators](https://onlinecalculatorsite.com/home-building-calculators/): Concrete, paint, tiles, decking, turf, bricks, stairs and radiators — 14 calculators for jobs around the house.
- [Date & Everyday Calculators](https://onlinecalculatorsite.com/date-everyday-calculators/): Ages, date spans, working days, timesheets, fuel costs, tips and splitting the bill — 16 calculators.
- [Conversion Calculators](https://onlinecalculatorsite.com/conversion-calculators/): Length, weight, temperature, volume, currency, colour, time zones and more — 16 converters.
- [Maths Calculators](https://onlinecalculatorsite.com/maths-calculators/): Percentages, fractions, averages, algebra, geometry and the scientific calculator — 18 in all.
- [Health & Fitness Calculators](https://onlinecalculatorsite.com/health-fitness-calculators/): BMI, body fat, calories, running pace, heart rate zones and pregnancy dates — 15 calculators.
- [Financial Calculators](https://onlinecalculatorsite.com/financial-calculators/): Tax, pay, mortgages, loans, savings and business figures — 33 calculators using current UK rates.
- [Dice Roller](https://onlinecalculatorsite.com/dice-roller/): Roll any number of dice with any number of sides, with a modifier and a running total.
- [Random Number Generator](https://onlinecalculatorsite.com/random-number-generator/): Generate random whole numbers in any range, with or without repeats.
- [Countdown Timer](https://onlinecalculatorsite.com/countdown-timer/): A live countdown to any date and time, down to the second.
- [Time Zone Converter](https://onlinecalculatorsite.com/time-zone-converter/): Convert a time between cities, with the difference and whether it lands in working hours.
- [Colour Converter](https://onlinecalculatorsite.com/colour-converter/): Convert a colour between HEX, RGB, HSL, HSV and CMYK, with contrast checks and a tint and shade.
- [Currency Converter](https://onlinecalculatorsite.com/currency-converter/): Convert between 160 currencies at the latest published daily reference rates.
- [Unit Converter](https://onlinecalculatorsite.com/unit-converter/): One converter for length, weight, volume, area, speed, energy, pressure, data and cooking measures.
- [Rent vs Buy Calculator](https://onlinecalculatorsite.com/rent-vs-buy-calculator/): Compare the true cost of renting against buying over the years you expect to stay put.
- [One Rep Max Calculator](https://onlinecalculatorsite.com/one-rep-max-calculator/): Estimate your one rep max from a weight and the reps you managed, with a table of training percentages.
- [Steps to Distance Calculator](https://onlinecalculatorsite.com/steps-to-distance-calculator/): Turn a step count into kilometres and miles, with the energy it used.
- [Child Height Predictor](https://onlinecalculatorsite.com/child-height-calculator/): A rough adult height for a child, from the heights of both parents.
- [Ovulation Calculator](https://onlinecalculatorsite.com/ovulation-calculator/): Your likely fertile days and the next few cycles, from your last period and your usual cycle length.
- [Pregnancy Due Date Calculator](https://onlinecalculatorsite.com/due-date-calculator/): An estimated due date from the first day of your last period, with how far along you are and the key milestones.
- [Heart Rate Zone Calculator](https://onlinecalculatorsite.com/heart-rate-zone-calculator/): Training zones from your age and resting heart rate, using the heart rate reserve method.
- [Race Time Predictor](https://onlinecalculatorsite.com/race-time-predictor/): Predict a race time at one distance from a result at another, using Riegel's formula.
- [Running Pace Calculator](https://onlinecalculatorsite.com/running-pace-calculator/): Your pace per kilometre and per mile from a distance and a time, with split times for common race distances.
- [Water Intake Calculator](https://onlinecalculatorsite.com/water-intake-calculator/): A daily fluid guide from your weight, with an allowance for exercise and hot weather.
- [Macro Calculator](https://onlinecalculatorsite.com/macro-calculator/): Split a daily calorie figure into grams of protein, carbohydrate and fat.
- [Ideal Weight Calculator](https://onlinecalculatorsite.com/ideal-weight-calculator/): What the four common height-and-weight formulas suggest, shown as a range rather than one number.
- [Body Fat Calculator](https://onlinecalculatorsite.com/body-fat-calculator/): Estimate your body fat percentage from a few tape measurements, using the US Navy method.
- [Salary Sacrifice Calculator](https://onlinecalculatorsite.com/salary-sacrifice-calculator/): What giving up salary for pension contributions really costs you once tax and National Insurance are counted.
- [Pension Drawdown Calculator](https://onlinecalculatorsite.com/pension-drawdown-calculator/): How long a pension pot lasts at a given withdrawal rate, allowing for growth and for withdrawals that rise with inflation.
- [Inflation Calculator](https://onlinecalculatorsite.com/inflation-calculator/): What a sum will be worth after inflation, or what it was worth in the past.
- [Break-Even Calculator](https://onlinecalculatorsite.com/break-even-calculator/): How many units you need to sell to cover your costs, and what that comes to in revenue.
- [Profit Margin Calculator](https://onlinecalculatorsite.com/profit-margin-calculator/): Margin, markup and profit from a cost and a selling price, or the price you need to hit a target margin.
- [Self-Employed Tax Calculator](https://onlinecalculatorsite.com/self-employed-tax-calculator/): Income tax and Class 4 National Insurance on self-employed profit.
- [Hourly to Salary Calculator](https://onlinecalculatorsite.com/hourly-to-salary-calculator/): Turn an hourly rate into weekly, monthly and annual pay.
- [Pro-Rata Salary Calculator](https://onlinecalculatorsite.com/pro-rata-salary-calculator/): What a full-time salary works out at for part-time hours, or for part of a year.
- [Remortgage Calculator](https://onlinecalculatorsite.com/remortgage-calculator/): Whether switching to a new mortgage deal leaves you better off once the fees are counted.
- [Mortgage Overpayment Calculator](https://onlinecalculatorsite.com/mortgage-overpayment-calculator/): What overpaying each month takes off your mortgage term, and how much interest it saves.
- [APR Calculator](https://onlinecalculatorsite.com/apr-calculator/): Work out the real annual rate on a loan from the amount borrowed and what you repay each month.
- [Car Finance Calculator](https://onlinecalculatorsite.com/car-finance-calculator/): Monthly payments on PCP or hire purchase, with the final balloon payment and what the credit actually costs.
- [Credit Card Payoff Calculator](https://onlinecalculatorsite.com/credit-card-payoff-calculator/): How long a card balance takes to clear at your current payment, and how much sooner a little extra would finish it.
- [Savings Goal Calculator](https://onlinecalculatorsite.com/savings-goal-calculator/): How long it takes to reach a savings target, and what you would need to put aside each month to get there sooner.
- [Radiator BTU Calculator](https://onlinecalculatorsite.com/radiator-btu-calculator/): The heat output a room needs, in BTU and watts, from its size and how well it holds heat.
- [Loft Insulation Calculator](https://onlinecalculatorsite.com/loft-insulation-calculator/): Rolls of mineral wool for a loft, in one layer or two crossed layers.
- [Timber Length Calculator](https://onlinecalculatorsite.com/timber-length-calculator/): How many stock lengths to buy, how to cut them, and how much is wasted.
- [Brick and Block Calculator](https://onlinecalculatorsite.com/brick-calculator/): Bricks or blocks for a wall, with the sand and cement for the mortar.
- [Stair Calculator](https://onlinecalculatorsite.com/stair-calculator/): Risers, goings and total run for a staircase, checked against Building Regulations Part K.
- [Roof Pitch Calculator](https://onlinecalculatorsite.com/roof-pitch-calculator/): Roof angle, pitch ratio and rafter length from the rise and the span.
- [Turf Calculator](https://onlinecalculatorsite.com/turf-calculator/): How many rolls of turf a lawn needs, and roughly what it weighs to carry.
- [Decking Calculator](https://onlinecalculatorsite.com/decking-calculator/): Boards and joists for a deck, from its size and the board you have chosen.
- [Tile Calculator](https://onlinecalculatorsite.com/tile-calculator/): How many tiles an area needs, with a cutting allowance and the number of boxes.
- [Wallpaper Calculator](https://onlinecalculatorsite.com/wallpaper-calculator/): How many rolls a room takes, including the waste a pattern repeat causes.
- [Paint Calculator](https://onlinecalculatorsite.com/paint-calculator/): How much paint a room needs, allowing for coats, doors and windows.
- [Gravel and Aggregate Calculator](https://onlinecalculatorsite.com/gravel-calculator/): Tonnes and bulk bags of gravel, sand, topsoil or hardcore for a given area and depth.
- [Screed Calculator](https://onlinecalculatorsite.com/screed-calculator/): Sand and cement screed for a floor, by volume, weight and bags.
- [Concrete Calculator](https://onlinecalculatorsite.com/concrete-calculator/): How much concrete a slab, footing or base needs, in cubic metres and 25 kg bags.
- [Fuel Economy Calculator](https://onlinecalculatorsite.com/fuel-economy-calculator/): Work out your real mpg from a tank of fuel, in both UK and metric measures.
- [Price per Unit Calculator](https://onlinecalculatorsite.com/price-per-unit-calculator/): Compare two sizes of the same thing and see which is actually better value.
- [Original Price Calculator](https://onlinecalculatorsite.com/original-price-calculator/): Work backwards from a sale price to what something cost before the discount.
- [Discount Calculator](https://onlinecalculatorsite.com/discount-calculator/): What you pay after a discount, what you save, and what two stacked discounts really come to.
- [Split the Bill Calculator](https://onlinecalculatorsite.com/split-the-bill-calculator/): Share a bill between people, evenly or with one person covering extra.
- [Tip Calculator](https://onlinecalculatorsite.com/tip-calculator/): What to tip, what the bill comes to, and what each person owes.
- [Timesheet Calculator](https://onlinecalculatorsite.com/timesheet-calculator/): Weekly hours and pay from your daily hours, including overtime at a higher rate.
- [Hours Between Times Calculator](https://onlinecalculatorsite.com/hours-between-times-calculator/): How long between two times, with unpaid breaks taken off and pay worked out.
- [Week Number Calculator](https://onlinecalculatorsite.com/week-number-calculator/): The ISO week number for any date, with the day of the year and the quarter.
- [Working Days Calculator](https://onlinecalculatorsite.com/working-days-calculator/): Count the working days between two dates, with bank holidays taken off.
- [Add or Subtract Days Calculator](https://onlinecalculatorsite.com/add-or-subtract-days-calculator/): Add days, weeks or months to a date, or count back from one, including working days only.
- [Sitemap](https://onlinecalculatorsite.com/sitemap/): Every page on the site, in one list.
- [Privacy Policy](https://onlinecalculatorsite.com/privacy-policy/): What this site does and does not do with your information. The short version: the calculators do not collect anything.
- [Terms of Use](https://onlinecalculatorsite.com/terms-of-use/): The terms on which you may use onlinecalculatorsite.com. By using the site you accept them.
- [About Us](https://onlinecalculatorsite.com/about-us/): onlinecalculatorsite.com is a free set of calculators for money, health, maths, conversion and everyday questions.
- [All Calculators](https://onlinecalculatorsite.com/all-calculators/): Every calculator on the site, grouped by what it is for. Anything shown in grey is written but does not have its own page yet.
- [Number to Words Converter](https://onlinecalculatorsite.com/number-to-words-converter/): Write a number out in words, as you would on a cheque, and as an amount in pounds and pence.
- [Roman Numeral Converter](https://onlinecalculatorsite.com/roman-numeral-converter/): Convert a number to Roman numerals, or Roman numerals back to a number.
- [Shoe Size Converter](https://onlinecalculatorsite.com/shoe-size-converter/): Convert shoe sizes between UK, EU and US, with the foot length each is based on.
- [Cooking Measures Converter](https://onlinecalculatorsite.com/cooking-measures-converter/): Convert between UK and US spoons, cups, fluid ounces and millilitres.
- [Data Storage Converter](https://onlinecalculatorsite.com/data-storage-converter/): Convert between bytes, kilobytes, megabytes and gigabytes, in both the decimal and binary senses.
- [Pressure Converter](https://onlinecalculatorsite.com/pressure-converter/): Convert between bar, psi, pascals, atmospheres and millimetres of mercury.
- [Energy Converter](https://onlinecalculatorsite.com/energy-converter/): Convert between joules, kilojoules, calories, kilocalories, watt-hours and BTU.
- [Speed Converter](https://onlinecalculatorsite.com/speed-converter/): Convert between miles per hour, kilometres per hour, metres per second, knots and feet per second.
- [Volume Converter](https://onlinecalculatorsite.com/volume-converter/): Convert between litres, cubic metres, and UK and US pints, gallons and fluid ounces.
- [Area Converter](https://onlinecalculatorsite.com/area-converter/): Convert between square metres, hectares, acres, square feet and square miles.
- [Temperature Converter](https://onlinecalculatorsite.com/temperature-converter/): Convert between Celsius, Fahrenheit and Kelvin.
- [Weight Converter](https://onlinecalculatorsite.com/weight-converter/): Convert between grams, kilograms, tonnes, ounces, pounds and stones.
- [Length Converter](https://onlinecalculatorsite.com/length-converter/): Convert between millimetres, metres, kilometres, inches, feet, yards, miles and nautical miles.
- [Logarithm Calculator](https://onlinecalculatorsite.com/logarithm-calculator/): The logarithm of a number to any base, with natural log, log base 10 and log base 2 alongside.
- [Scientific Notation Converter](https://onlinecalculatorsite.com/scientific-notation-converter/): Convert a number to and from scientific notation, with engineering notation and the SI prefix alongside.
- [Rounding Calculator](https://onlinecalculatorsite.com/rounding-calculator/): Round a number to decimal places, significant figures, or the nearest ten, hundred or thousand.
- [Volume Calculator](https://onlinecalculatorsite.com/volume-calculator/): Volume of a box, cylinder, sphere or cone, in cubic units and in litres.
- [Area Calculator](https://onlinecalculatorsite.com/area-calculator/): Area of a rectangle, triangle, circle, trapezium or parallelogram.
- [Circle Calculator](https://onlinecalculatorsite.com/circle-calculator/): Give any one of radius, diameter, circumference or area, and get the other three.
- [Triangle Calculator](https://onlinecalculatorsite.com/triangle-calculator/): From three sides: the angles, the area, the perimeter and what kind of triangle it is.
- [Quadratic Equation Solver](https://onlinecalculatorsite.com/quadratic-equation-solver/): Solve ax² + bx + c = 0, with the discriminant, the vertex and the nature of the roots.
- [LCM and HCF Calculator](https://onlinecalculatorsite.com/lcm-hcf-calculator/): Highest common factor and lowest common multiple of two or more whole numbers.
- [Prime Factorisation Calculator](https://onlinecalculatorsite.com/prime-factorisation-calculator/): Break a whole number into its prime factors, and see whether it is prime.
- [Standard Deviation Calculator](https://onlinecalculatorsite.com/standard-deviation-calculator/): Standard deviation and variance for a list of numbers, for a whole population or a sample of one.
- [Mean, Median and Mode Calculator](https://onlinecalculatorsite.com/mean-median-mode-calculator/): Averages for a list of numbers — mean, median, mode and range, with the count and total.
- [Ratio Calculator](https://onlinecalculatorsite.com/ratio-calculator/): Simplify a ratio, see it as a percentage split, and share a total out in that proportion.
- [Decimal to Fraction Calculator](https://onlinecalculatorsite.com/decimal-to-fraction-calculator/): Turn a decimal into its simplest fraction, with the mixed number and percentage alongside.
- [Fraction Calculator](https://onlinecalculatorsite.com/fraction-calculator/): Add, subtract, multiply or divide two fractions, with the answer simplified and shown as a decimal.
- [Fuel Cost Calculator](https://onlinecalculatorsite.com/fuel-cost-calculator/): What a journey costs in fuel, from your mileage and the price at the pump. Miles or kilometres, mpg or litres per 100 km.
- [Date Duration Calculator](https://onlinecalculatorsite.com/date-duration-calculator/): How long between two dates, in days, weeks and months, with working days counted separately.


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