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27 free property calculators
Free. Shows working. No sign-up.
Smart property decisions start with transparent math. Run BTL, BRRR, HMO, flip, SDLT, and more. Then hit Show working to see the formula, your inputs, and every step. No hidden assumptions. No paywall.
Click once. See everything. Understand it completely.
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Only on propCALC
Show working
Most calculators give you a number and hide the maths. propCALC shows the full working: the formula, your inputs, each arithmetic step, and where every cost comes from. No sign-up. Free on all 27 calculators.
- ✓ Net yield, cashflow, ROI: formula plus your numbers
- ✓ Management fee, void, maintenance broken out line by line
- ✓ Run the calculator once, then tap Show working on the results
Deal strategy calculators
Click any card to open the calculator. No login required. Full index (all 27).
Strategy Finder
Five questions match your capital and goals to BTL, BRR, HMO, R2R, SA, and more.
Open calculator →Buy to Let (BTL)
Gross yield, net yield, monthly cashflow, ROI on capital invested.
Open calculator →HMO
Per-room rental income, void allowance, net yield, cashflow per month.
Open calculator →BRRR
Buy, Refurbish, Refinance, Rent. Capital recycled, equity locked in.
Open calculator →Serviced Accommodation (SA)
Occupancy-based revenue model, platform fees, net profit vs standard BTL.
Open calculator →Property Flip
Purchase, refurb, resale. Profit margin, ROI, break-even sale price.
Open calculator →Rent to Rent (R2R)
Net profit after rent paid to landlord, management costs, and vacancy.
Open calculator → StrategyBMV / No Money Down
Same-day remortgage at open-market value to recycle purchase cash.
Open calculator → StrategyCommercial yield
Passing rent, cap rate, and commercial SDLT bands.
Open calculator → StrategyDevelopment / GDV
GDV, build costs, equity, and sell margin viability.
Open calculator →Financial tools
Underwriting and tax calculations.
Stamp Duty (SDLT)
Residential, BTL additional rate, and first-time buyer relief. 2024/25 rates.
Open calculator → Finance toolBridging Finance
Monthly interest cost, total facility, exit yield at refinance or sale.
Open calculator → Finance toolMortgage Payments
Monthly repayment, interest-only payment, total cost over term.
Open calculator → Finance toolDSCR
Debt service coverage for lender stress tests.
Open calculator → Finance toolNPV and IRR
Discounted cashflows and internal rate of return.
Open calculator →Quick utility calculators
Yield, tax, void cost, refurb, and more. All with Show working.
How it works
Pick a calculator
Choose from 10 strategy tools, 9 financial models, and 8 quick utilities. No account needed.
Enter your numbers
Purchase price, rent, refurb costs. Results update as you type.
Show working
Open Show working to see every formula, your inputs, and the arithmetic step by step.
Save or download
Email yourself a PDF summary, or sign up to Propreneur to save against a real property.
Why propCALC?
Most UK property calculators sit behind a sign-up wall or a monthly subscription. propCALC does neither.
| Feature | propCALC.uk | Login-gated tools | Subscription tools |
|---|---|---|---|
| Use calculators free | Yes | Account required | Paid plan only |
| No sign-up to run numbers | Yes | No | No |
| Show working (formula transparency) | Yes, free | Rare / paid | Rare / paid |
| Number of calculators | 27 | 3-6 typical | 3-6 typical |
| PDF deal pack download | Email only (free) | Paid tier | Paid tier |
| Save and track deals | Via Propreneur (free tier) | Paid tier | Paid tier |
Comparison reflects the typical model of UK property calculator websites and SaaS underwriting tools as of 2026.
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