Free, no-signup tools for UK businesses and individuals. Get accurate results in seconds.
Find out exactly how much your business is losing from unanswered calls and missed opportunities.
Calculate how much revenue your business loses every month from unanswered phone calls.
See the monthly cost of appointment no-shows and cancellations on your business revenue.
Estimate how much revenue you lose from calls that come in outside your opening hours.
Work out the true cost of every journey — whether you're commuting, running a fleet, or planning a road trip.
Calculate the exact fuel cost of any journey based on distance, fuel type, and current UK fuel prices.
Find your true cost per mile including fuel, depreciation, insurance, and maintenance.
Calculate your real-world MPG from a fill-up and convert between MPG and L/100km instantly.
Plan your full trip budget including fuel, accommodation, food, and cost per person.
UK-specific financial calculators using current tax bands, VAT rates, and HMRC guidelines.
Add or remove VAT at 20%, 5%, or 0% instantly. Works for invoices, quotes, and receipts.
Calculate your take home pay after Income Tax and National Insurance. 2024/25 UK tax bands.
Calculate monthly repayments, how much you can borrow, and stamp duty costs.
See how long to pay off debt and how much interest you can save by paying more each month.
Calculate monthly repayments, total interest, and when your loan will be paid off or written off.
Estimate your Income Tax and National Insurance as a sole trader using 2024/25 UK tax bands.
Understand the real cost of your workforce — from hiring and training to absence and turnover.
Calculate the true cost of losing an employee — recruitment, training, lost productivity, and more.
See the total cost of employing someone beyond their salary — NI, pension, benefits, and overheads.
Calculate the cost of employee sick days to your business including SSP, lost productivity, and cover.
Plan your home projects with realistic UK cost estimates before you speak to any tradesperson.
Get a realistic estimate for a house extension based on size, type, and your UK region.
Estimate roof repair or replacement costs based on roof size, type, and materials.
Find out how much you're wasting on energy bills and where the biggest savings are hiding.
CostCalculators.co.uk provides a growing library of free, accurate cost calculators designed specifically for the UK market. Whether you're a small business owner trying to understand your true operating costs, a self-employed professional calculating your tax liability, or a homeowner planning a renovation project, our tools give you instant, reliable results without any signup or payment required.
All our calculators use current UK figures — including 2024/25 tax bands, current fuel prices, and UK statutory rates — and are updated regularly to ensure accuracy. Every calculator works in real time, so you can adjust your inputs and see the impact immediately.
Most people significantly underestimate the true cost of things. A business owner might know their employee's salary but not factor in employer National Insurance, pension contributions, or the cost of absence. A driver might calculate fuel costs but ignore depreciation and maintenance. A landlord might estimate renovation costs without accounting for regional price variation.
Our calculators are designed to surface these hidden costs, giving you a complete and honest picture so you can make better decisions — whether that's pricing your services correctly, planning a budget, or understanding where your money is really going.