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The ProToolFlow Discovery Hub

All 50 free calculators on this site in one place. Pick a category, open a tool, get your answer. No sign-up, no cost.

50Free tools

4Categories

$0Cost to use

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Real Estate — Discovery Hub Tools

17 tools

Home Affordability Calculator Find out how much home you can realistically afford based on income, debts, and down payment. Free Debt-to-Income Ratio Calculator Calculate your DTI ratio to see if you qualify for a mortgage before applying. Free Closing Cost Estimator Estimate total closing costs on a home purchase so there are no surprises at the table. Free HELOC Calculator Find out how much equity you can access through a home equity line of credit. Free Refinance Savings Calculator See how much you could save by refinancing your mortgage at a lower rate. Free Rent vs Buy Calculator Compare the true long-term cost of renting versus buying a home in your market. Free Property Tax Calculator Estimate your annual property tax bill based on assessed value and local tax rate. Free 1031 Exchange Timeline Calculator Track your 45-day and 180-day deadlines for a valid 1031 exchange. Free Airbnb Profitability Estimator Estimate net profit from a short-term rental after expenses, occupancy, and platform fees. Free BRRRR Method Calculator Model your Buy, Rehab, Rent, Refinance, Repeat strategy with real numbers. Free Cap Rate Calculator Calculate the capitalisation rate on a rental property to evaluate investment return. Free DSCR Calculator Check your debt service coverage ratio to see if a rental property qualifies for financing. Free Hard Money Loan Estimator Estimate monthly payments and total cost on a hard money loan for fix-and-flip projects. Free CapEx Reserve Calculator Calculate how much to set aside monthly for capital expenditures on a rental property. Free Rental Property Depreciation Calculator Calculate your annual depreciation deduction on a residential rental property. Free Rental ROI Calculator Measure total return on investment for a rental property including cash flow and appreciation. Free Seller Net Sheet Calculator Estimate how much you will walk away with after selling your home once all costs are deducted. Free

Finance & Tax — Discovery Hub Tools

15 tools

Capital Gains Tax Estimator Estimate short and long-term capital gains tax on the sale of stocks, property, or crypto. Free Self-Employed Tax Estimator Calculate your self-employment tax plus federal income tax as a freelancer or sole trader. Free Estate Tax Calculator Estimate federal estate tax liability based on the current exemption threshold. Free Dividend Tax Calculator Calculate tax owed on qualified and ordinary dividends based on your income bracket. Free Tax Bracket Calculator Find your effective and marginal tax rate based on your filing status and income. Free Inheritance Tax Estimator Estimate inheritance tax based on the value of assets received and applicable exemptions. Free Freelance Tax Withholding Estimator Figure out how much to set aside from each invoice for quarterly tax payments. Free Crypto Tax Loss Harvesting Tool Calculate potential tax savings by harvesting losses in your crypto portfolio. Free 401k Calculator Project your 401k balance at retirement based on contributions, employer match, and growth rate. Free FIRE Calculator Find out how many years until you can retire early based on savings rate and spending. Free Net Worth Tracker Add up your assets and liabilities to get a clear picture of your current net worth. Free Roth vs Traditional IRA Calculator Compare Roth and Traditional IRA outcomes based on your tax rate now and in retirement. Free Bitcoin Profit Calculator Calculate profit or loss on a Bitcoin investment based on entry price, exit price, and fees. Free Savings Planner Calculator Set a savings goal and find out exactly how much to put aside each month to reach it. Free Credit Score Simulator See how different actions — paying off debt, opening accounts — could affect your credit score. Free

Business & SaaS — Discovery Hub Tools

12 tools

LTV:CAC Ratio Calculator Check whether your customer lifetime value justifies your acquisition cost. Free SaaS Churn Cost Calculator Quantify the annual revenue loss caused by customer churn in your SaaS business. Free CAC Payback Period Calculator Find out how many months it takes to recover the cost of acquiring a new customer. Free Burn Rate & Runway Calculator Calculate monthly cash burn and how many months of runway your startup has left. Free Customer Churn Rate Calculator Measure the percentage of customers lost in a given period and its impact on growth. Free Startup Valuation Calculator Estimate your startup’s pre-money valuation using common venture capital methods. Free CAC Deep-Dive Tool Break down customer acquisition cost by channel to find where your marketing spend works best. Free Cap Table Dilution Simulator Model how a new funding round dilutes existing shareholders in your cap table. Free Freelance Hourly Rate Calculator Calculate the minimum hourly rate you need to charge to meet your income goals as a freelancer. Free Hourly to Salary Converter Convert an hourly wage to annual salary or the other way around, including overtime. Free Break-Even Point Calculator Find the exact sales volume needed to cover your fixed and variable costs. Free SBA 7(a) Loan Calculator Estimate monthly payments and total interest on an SBA 7(a) small business loan. Free

Tech & Creator — Discovery Hub Tools

5 tools

YouTube Money Calculator Estimate YouTube ad revenue based on views, CPM, and audience location. Free TikTok Money Calculator Estimate TikTok Creator Fund earnings and brand deal rates based on follower count and engagement. Free AdSense Revenue Estimator Project monthly AdSense income based on your traffic, niche, and average RPM. Free Affiliate Marketing ROI Calculator Calculate return on investment for an affiliate marketing campaign across any niche. Free Influencer Sponsorship Rate Estimator Estimate fair sponsorship rates for Instagram, YouTube, or TikTok based on audience size and engagement. Free

About this discovery hub

This discovery hub lists all 50 free financial calculators on ProToolFlow. Every tool is free to use with no account required. The numbers you enter stay in your browser — nothing is stored or shared.

All tax figures are based on published IRS guidelines. Calculator results are estimates for informational purposes only — not professional financial advice.

Missing a tool you need? Contact us and we will consider adding it.