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[Home](/)/ Tools 

Free tools · no email wall 

# The tools I __actually__ use

Calculators, spreadsheets, and apps for running the numbers and keeping more of what you earn. Free to use, no signup required.

Calculators 

## Run the numbers

[Real Estate 

### Deal Analysis Calculator

Cash flow, cash-on-cash, cap rate, and NOI. Type in a price and watch it move.

Open →](/tools/deal-analysis-calculator/) [Tax Savings 

### Cost Segregation Calculator

Estimate first-year depreciation on a rental.

Open →](/cost-seg-calculator/) [Tax Savings 

### Average Stay Calculator

Check if a short-term rental clears the STR loophole bar.

Open →](/average-stay-calculator/) [Tax Savings 

### Vehicle Tax Deduction Calculator

Compare Section 179 vs. the mileage deduction side by side.

Open → ](/vehicle-deduction-calculator/)

Downloads 

## Spreadsheets and checklists

[Spreadsheet 

### Buy & Hold Deal Calculator

Cash-on-cash, cap rate, NOI, and cash flow in one sheet.

Open →](/resources-downloads/) [Checklist 

### Due Diligence Checklist

What to verify before you ever wire earnest money.

Open →](/resources-downloads/) [Guide 

### Build-to-Rent Strategy Package

Specs list and budget sheet for new-construction rentals.

Open → ](/resources-downloads/)

Ready for more than a spreadsheet? 

## The software I built to do this for you

The calculators above are free and they will get you a long way. When you are analyzing deals at scale, proving REPS or STR hours, or filling a vacant unit, the apps pick up where the spreadsheets stop.

[See the apps →](/software/)

Off to go build something.  
Go build yours.  ~ Jennifer

© 2026 Addicted to ROI. Education and community, not financial or tax advice.

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Explore: [Travel](/pillars/travel/)  · [Real Estate](/pillars/real-estate/)  · [Tax Savings](/pillars/tax-savings/)  · [Business](/pillars/business/) 

Free tools: [Deal Analysis Calculator](/tools/deal-analysis-calculator/)  · [Cost Segregation Calculator](/cost-seg-calculator/)  · [Average Stay Calculator](/average-stay-calculator/)  · [Vehicle Deduction Calculator](/vehicle-deduction-calculator/)  · [Free Downloads](/resources-downloads/) 

[Agents Invest](https://agentsinvest.com)  · [DoorProfit](https://doorprofit.com)  · [REPS Time](https://repstime.com)  · [STR Loophole](https://strhours.com)  · [Kids Payroll](https://kidspayroll.com)  · [RentStager](https://rentstager.com)