Free Business & Excel Online Calculators
High-precision operational and financial tools built by senior spreadsheet engineers. Calculate inventory reorder points, contractor job quotes, cash runways, and modern Excel formulas instantly in your browser.
E-Commerce Net Margin & Amazon FBA Fee Calculator
Calculate true SKU profit margins factoring in factory COGS, ocean freight, Amazon referral fees, FBA pick & pack, blended ad spend (TACoS), and customer returns.
Restaurant Food Cost % & Menu Pricing Calculator
Calculate recipe portion food cost percentage, prep shrinkage loss, and suggested menu retail selling prices to ensure prime cost profitability.
SaaS MRR Waterfall, Churn & LTV Calculator
Calculate Net New MRR, ARR run-rate, gross monthly churn rate, Net Dollar Retention (NDR), and Customer Lifetime Value (LTV) for subscription businesses.
Reorder Point & Safety Stock Calculator
Calculate your exact reorder threshold and safety stock buffer based on lead times and demand variability. Prevent stockouts without overstocking cash.
Contractor Bid & Markup Margin Calculator
Accurately calculate labor, materials, subcontractor costs, overhead allocation, and target profit margin to quote profitable bids without undercharging.
Cash Flow Burn Rate & Runway Calculator
Determine exactly how many months of runway your business has before running out of cash. See net monthly burn and revenue needed to break even.
Break-Even Point & Contribution Margin Calculator
Calculate the exact unit sales volume and monthly gross revenue needed to cover fixed operating overhead and achieve your target net profit goal.
Real Estate Cap Rate, NOI & Cash-on-Cash Calculator
Underwrite rental properties and commercial NNN deals. Compute Net Operating Income (NOI), Cap Rate %, Cash-on-Cash Return, and lender DSCR.
Business Loan Amortization & SBA DSCR Calculator
Calculate monthly commercial or SBA 7(a) loan principal and interest payments, lifetime interest cost, and test the 1.25x bank DSCR covenant.
True Employee Cost & Labor Burden Calculator
Calculate the true fully-burdened annual and productive hourly cost of an employee after FICA, FUTA/SUTA, Workers' Comp, health insurance, and 401(k) match.
Blended ROAS, MER & Breakeven CPA Calculator
Calculate your Break-Even ROAS floor, maximum allowable CPA, Marketing Efficiency Ratio (MER), and net contribution profit after ad spend.
AIA G702 / G703 Construction Draw & Progress Billing Calculator
Calculate bank-ready AIA G702 progress draws (Lines 1-9), net payment due, previous certificates, and retainage withholdings (5% / 10%).
Bill of Materials (BOM) Cost & Manufacturing Unit COGS Calculator
Calculate multi-component raw material roll-ups, scrap waste rates, direct assembly labor cycle time, factory overhead burden, and wholesale price margins.
Gross Margin vs. Markup & Retail Price Calculator
Convert between gross profit margin %, markup on cost %, unit cost, and selling price. Never confuse markup with margin again.
Days Sales Outstanding (DSO) & AR Aging Calculator
Measure your average collection period in days, identify cash trapped in overdue customer invoices, and benchmark against Net 30/60 terms.
Inventory Turnover Ratio & Days Sales of Inventory (DSI) Calculator
Calculate your annual inventory turnover velocity, average days to sell through stock, and storage holding carrying costs.
Janitorial & Commercial Cleaning Bid Calculator
Price office, clinic and retail cleaning contracts from square footage, production rate, visits, burdened wages, supplies and overhead. Export the bid to Excel.
Modern Excel Formula Generator & Explainer
Generate clean modern Excel formulas (XLOOKUP, LET, SUMIFS, FILTER, UNIQUE) with dynamic syntax explanation. Replace clunky nested VLOOKUPs instantly.
Sheet Doctor — Instant Excel Workbook Auditor & Health Scanner
Drop any .xlsx or .xlsm file to scan locally in your browser for broken formulas (#REF!, #DIV/0!), volatile functions, legacy VLOOKUPs, and hidden VBA macros.
Want to run these calculations automatically in Excel?
Our verified, macro-free Microsoft Excel (.xlsx) workbooks connect these calculations directly to multi-item tables, automatic purchase orders, and dynamic executive dashboards. Single one-time payment ($9 – $29).