Best Property Calculators UK 2026
Compare the top free calculators for mortgages, stamp duty, rental yield, buy-to-let returns, and more
Why Use a Property Calculator?
Property is the largest financial commitment most people ever make. Whether you are buying your first home, expanding a buy-to-let portfolio, or considering equity release, running the numbers before committing is essential. Property calculators help you understand true costs, compare options, and avoid costly surprises.
We have evaluated the best free property calculators available in 2026, testing them for accuracy, usability, and coverage of UK-specific rules like stamp duty bands and LTV thresholds.
Top Property Calculators for 2026
🥇 Mortgage Calculator
Calculate your monthly mortgage payments based on property price, deposit, interest rate, and term length. Shows total cost of the mortgage including all interest paid over the full term.
Best for: First-time buyers, home movers, and anyone remortgaging who wants to understand their monthly commitments.
🥈 Stamp Duty Calculator
Calculate stamp duty land tax on any UK property purchase. Automatically applies first-time buyer relief, additional property surcharges, and the latest rate bands.
Best for: Anyone buying a property in the UK who needs to budget for stamp duty costs at completion.
🥉 Buy-to-Let Yield Calculator
Assess the return on a buy-to-let investment by calculating gross and net rental yield. Factors in purchase costs, mortgage payments, and ongoing expenses to show true profitability.
Best for: Property investors evaluating potential buy-to-let purchases and landlords reviewing existing portfolio performance.
#4 Rental Yield Calculator
Quickly calculate the rental yield percentage for any property. Enter the property value and monthly rent to see the annual gross yield and compare against market averages.
Best for: Landlords, property investors, and estate agents comparing yields across different properties or locations.
#5 Equity Release Calculator
Estimate how much equity you could release from your home and understand how interest rolls up over time. Shows the impact on your estate value at different future dates.
Best for: Homeowners aged 55+ considering equity release to fund retirement, home improvements, or help family members.
#6 Mortgage Overpayment Calculator
See how much time and money you save by making overpayments on your mortgage. Compare different overpayment amounts and frequencies to find the optimal strategy.
Best for: Existing mortgage holders wanting to reduce their term or total interest, and anyone with spare cash considering overpayments vs investing.
#7 Loan-to-Value (LTV) Calculator
Calculate your loan-to-value ratio, a key metric that lenders use to determine mortgage rates and eligibility. Shows what LTV band you fall into and what it means for your options.
Best for: Mortgage applicants wanting to understand their LTV, and homeowners checking if they can remortgage to a better rate.
Related Guides
Looking specifically at mortgage calculators? See our detailed Mortgage Calculators Comparison for an in-depth review of mortgage-specific tools.
Property Buying Checklist
- Budget: Use the mortgage calculator to know your monthly payment before house hunting
- Stamp duty: Factor this into your total purchase cost from day one
- LTV: Aim for 80% or lower to access the best mortgage rates
- Rental yield: For buy-to-let, target at least 5% gross yield to cover costs comfortably
- Overpayments: Even small regular overpayments save thousands over a mortgage term
Frequently Asked Questions
How much deposit do I need to buy a house in the UK in 2026?
Most lenders require a minimum 5-10% deposit, though 15-20% gets you access to better interest rates. Use our mortgage calculator and LTV calculator together to see how your deposit size affects monthly payments and available rates.
How is stamp duty calculated in 2026?
Stamp duty is calculated in bands on the portion of the property price within each threshold. First-time buyers benefit from relief on properties up to a certain value. Our stamp duty calculator applies the latest rates automatically.
What is a good rental yield for a buy-to-let property?
A gross rental yield of 5-8% is generally considered good, though this varies by location. Net yield after costs is more meaningful. Use our rental yield and buy-to-let calculators to assess specific properties.
Is it worth overpaying my mortgage?
Overpaying can save thousands in interest and shorten your mortgage term significantly. Most lenders allow 10% overpayment per year without penalties. Use our mortgage overpayment calculator to see the exact savings for your situation.