The calculator hub for operators & investors
Precision calculators for people who run the numbers.
CalcCentral is a growing library of fast, accurate, no-signup utilities. Every tool runs instantly in your browser — no accounts, no paywalls, no fluff. We're rolling out one vertical at a time, starting with the metrics that make or break a real estate deal.
Commercial Real Estate & Investing
Underwrite deals, model cash flow, and pressure-test returns with 15 investor-grade tools.
- BRRRR CalculatorFree BRRRR calculator to analyze Buy, Rehab, Rent, Refinance, Repeat deals. Instantly see cash left in the deal, cash flow, and refinance loan amount.Open calculator →
- Cap Rate CalculatorCalculate the capitalization rate on any commercial property in seconds. Enter income and price to get NOI and cap rate so you can compare deals fast.Open calculator →
- Cash-on-Cash Return CalculatorFree cash-on-cash return calculator for rental property investors. Measure your annual pre-tax cash flow against the actual cash you invested.Open calculator →
- Gross Rent Multiplier (GRM) CalculatorUse our Gross Rent Multiplier calculator to quickly screen rental properties. Divide price by gross annual rent to compare deals before deep analysis.Open calculator →
- Net Operating Income (NOI) CalculatorCalculate Net Operating Income for any income property. Factor in vacancy and operating expenses to find the NOI lenders and investors rely on.Open calculator →
- Debt Service Coverage Ratio (DSCR) CalculatorFree DSCR calculator for real estate investors. Check if a property's net operating income covers its debt so you can qualify for a DSCR loan.Open calculator →
- Fix and Flip Profit CalculatorEstimate your fix and flip profit before you buy. Enter ARV, purchase, rehab, holding, and selling costs to see net profit and ROI instantly.Open calculator →
- Rental Property Cash Flow CalculatorFree rental property cash flow calculator. Enter rent, vacancy, mortgage, and expenses to see monthly and annual cash flow before you invest.Open calculator →
- 70% Rule CalculatorApply the 70% rule instantly. Enter the ARV and repair costs to find your maximum allowable offer on a flip or BRRRR property in seconds.Open calculator →
- Internal Rate of Return (IRR) Real Estate CalculatorCalculate the internal rate of return on a real estate investment. Model cash flow, hold period, and sale proceeds to find your IRR and equity multiple.Open calculator →
- Amortization Schedule GeneratorFree mortgage amortization calculator. Enter loan amount, rate, and term to see your monthly payment, total interest, and total cost of the loan.Open calculator →
- 1031 Exchange Timeline & Capital Gains CalculatorPlan your 1031 exchange with our timeline and capital gains calculator. Find your 45-day and 180-day deadlines and estimate the tax you can defer.Open calculator →
- Hard Money Loan CalculatorFree hard money loan calculator. Estimate interest-only payments, origination points, and the total cost of your short-term fix and flip financing.Open calculator →
- Rent vs. Sell CalculatorShould you rent or sell your property? Compare net sale proceeds against long-term rental cash flow and appreciation to make the smarter move.Open calculator →
- Property Depreciation (MACRS) CalculatorFree rental property depreciation calculator using MACRS. Enter price and land value to find your annual and first-year depreciation deduction.Open calculator →
SaaS & Startup Unit Economics
Model the metrics investors underwrite — CAC, LTV, churn, burn, and retention — with 15 founder-grade calculators.
- Customer Acquisition Cost (CAC) CalculatorFree Customer Acquisition Cost calculator for SaaS founders. Divide sales and marketing spend by new customers to find your true CAC and benchmark growth.Open calculator →
- Customer Lifetime Value (LTV) CalculatorFree SaaS Customer Lifetime Value calculator. Turn ARPU, gross margin, and churn into LTV to see what each customer is truly worth over their lifespan.Open calculator →
- LTV to CAC Ratio CalculatorFree LTV to CAC ratio calculator — the ultimate SaaS health check. Compare lifetime value to acquisition cost to see if your unit economics work.Open calculator →
- Monthly Recurring Revenue (MRR) Growth CalculatorFree MRR growth calculator for SaaS. Combine new, expansion, contraction, and churned MRR to find net new MRR and your true monthly growth rate.Open calculator →
- SaaS Churn Rate CalculatorFree SaaS churn rate calculator. Measure both customer (logo) churn and revenue churn from your MRR to understand retention and protect recurring revenue.Open calculator →
- Burn Rate & Runway CalculatorFree startup burn rate and runway calculator. Enter cash, revenue, and expenses to find net monthly burn and how many months of runway you have left.Open calculator →
- Average Revenue Per User (ARPU) CalculatorFree ARPU calculator for SaaS. Divide total recurring revenue by active accounts to find average revenue per user and benchmark pricing and monetization.Open calculator →
- Viral Coefficient (K-Factor) CalculatorFree viral coefficient (K-factor) calculator. Multiply invites per customer by conversion rate to see if your referral loops drive viral growth.Open calculator →
- SaaS Quick Ratio CalculatorFree SaaS Quick Ratio calculator. Compare gained MRR (new + expansion) to lost MRR (churn + contraction) to measure your growth efficiency.Open calculator →
- Magic Number CalculatorFree SaaS Magic Number calculator. Divide annualized new revenue by prior-quarter S&M spend to measure go-to-market efficiency and when to scale.Open calculator →
- Payback Period CalculatorFree CAC payback period calculator for SaaS. Find how many months of gross profit it takes to recover a customer's acquisition cost.Open calculator →
- Net Revenue Retention (NRR) CalculatorFree Net Revenue Retention (NRR) calculator. Measure how much revenue your existing customers retain and expand — the metric investors value most.Open calculator →
- Employee Equity Dilution CalculatorFree equity dilution calculator for founders and employees. See how a new funding round or option pool expansion shrinks your ownership percentage.Open calculator →
- Freelance Rate to Salary CalculatorFree freelance rate to salary calculator. Convert your hourly contractor rate into an equivalent full-time salary after hours and expenses.Open calculator →
- Stripe & PayPal Merchant Fee CalculatorFree Stripe and PayPal fee calculator. Enter a transaction amount and processor rate to see the exact fee and net revenue you keep.Open calculator →