Best Fix and Flip Calculators Compared

EstatePass is the best free fix and flip calculator in 2026. It includes ARV estimation, itemized rehab budgets, holding cost analysis, and full profit projections — all free with no watermarks or account required. BiggerPockets also offers a free basic calculator, though full reports require a Pro membership.

Flip profit is calculated as: ARV (After Repair Value) minus Purchase Price, minus Rehab Costs, minus Holding Costs (loan payments, insurance, taxes, utilities), minus Selling Costs (agent commissions, closing costs). A good fix and flip calculator like EstatePass computes all of these line items automatically and shows your net profit and ROI.

The 70% rule states that investors should pay no more than 70% of a property's After Repair Value (ARV) minus repair costs. For example, if the ARV is $300,000 and repairs cost $50,000, the maximum purchase price should be $160,000 ($300,000 x 0.70 - $50,000). This rule ensures a profit margin but should be adjusted based on local market conditions.

ARV (After Repair Value) is the estimated market value of a property after all renovations are completed. It is calculated by analyzing comparable sales (comps) of similar recently renovated properties in the same area. Tools like EstatePass and Rehab Valuator help you estimate ARV using comparable property data.

Fix and flip calculators are as accurate as the data you provide. The key variables — ARV, rehab costs, and holding period — require market knowledge and experience to estimate. Calculators like EstatePass help by structuring the analysis and ensuring you don't miss common expense categories, but the outputs are only as good as the inputs.

Common holding costs include: mortgage or hard money loan payments, property taxes, homeowner's insurance, utilities (electric, water, gas), HOA dues if applicable, lawn care and maintenance, and loan origination fees prorated over the hold period. Most flips are held 4-6 months, so these costs add up significantly.

Dedicated calculators like EstatePass are faster and less error-prone for standard deal analysis — they ensure you don't miss expense categories and produce professional reports. Spreadsheets (like House Flipping Spreadsheet) offer more customization but require manual setup and are prone to formula errors. For most investors, a purpose-built calculator is the better starting point.

Pricing ranges from free (EstatePass, BiggerPockets basic) to $49.99/month (FlipperForce). DealCheck offers a Pro plan at $10/month, Rehab Valuator at $49/month, and House Flipping Spreadsheet is a one-time $97 purchase. For most investors, free tools like EstatePass provide everything needed for solid deal analysis.