# Use the calculators

> Run quick investment math with the in-app calculators, or share the free public calculators with people who do not have an account.

The calculators give you fast answers to single questions, such as what you can pay for a flip or what a rental earns each month. They are separate from the Deal Analyzer, which evaluates a whole deal and saves it to your pipeline.

## Open a calculator

1. **Open Calculators**

   In the sidebar, select **Calculators**. The **Investment Calculators** page lists every tool under **All Calculators**.

2. **Pick one**

   Select a card, or its **Open Calculator** link.

3. **Enter your numbers**

   Fill in the fields. Results appear under **Results** as you type.

4. **Start over if you need to**

   Select **Reset** to clear your entries and return to the starting values.

> **What you should see:** a **Results** section that updates with your inputs. Select **All Calculators** at the top to go back to the list.

## The calculators

| Calculator | What it answers | Example fields |
|---|---|---|
| **MAO Calculator** | The most you can offer, using the 70% rule | **ARV (After-Repair Value)**, **Repair Costs**, **Rule Percentage** |
| **Fix & Flip Calculator** | Profit and ROI on a flip, after rehab and selling costs | **Purchase Price**, **Rehab Budget**, **Hold Period**, **Selling Costs (% of ARV)** |
| **BRRRR Calculator** | The full buy, rehab, rent, refinance, repeat cycle | Purchase, rehab, refinance, and rent inputs |
| **Rental Income Calculator** | Cash flow, ROI, and cap rate for a rental | Price, rent, and expense inputs |
| **Cash Flow Calculator** | Monthly and annual cash flow for a rental | Rent and expense inputs |
| **ROI Calculator** | Cash-on-cash return and cap rate | Investment and income inputs |
| **Cap Rate Calculator** | Capitalization rate for a property | **Annual NOI** and **Property Value**, or **Annual Rent**, **Vacancy Rate**, **Annual Operating Expenses** |
| **Mortgage Calculator** | Monthly payment, interest, and amortization | **Home Price**, **Down Payment**, **Interest Rate**, **Loan Term** |
| **Down Payment Calculator** | The cash you need at closing | Price, down payment, and closing cost inputs |

The page also links to the **Deal Analyzer** for a full analysis across strategies. See [Run the numbers](https://docs.reinvestorhub.ai/guides/find-and-evaluate-a-property/run-the-numbers/).

## Free public calculators

Some of the same tools are free on the Re:InvestorHub website, with no account needed. They live at **reinvestorhub.ai/tools**. Send the link to a partner, lender, or friend who wants to check a number. Inside your account you get the same tools without leaving the app.

> **Tip:** Not sure how to read a result? Select **Ask AI Coach** at the bottom of the Calculators page and ask the coach to walk you through it.

## Next step

  - [Run the numbers](https://docs.reinvestorhub.ai/guides/find-and-evaluate-a-property/run-the-numbers/): Analyze a whole deal in the Deal Analyzer.
  - [Work with the AI coaches](https://docs.reinvestorhub.ai/guides/work-with-the-ai-coaches/): Get help interpreting the numbers.