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Calculators, website checks and research tools for finance, business, SEO and AI visibility. Each one shows how its answer is worked out.
Finance & FinTechMortgage CalculatorCompare interest-only and repayment mortgage payments, interest and loan-to-value. Interest-only payments leave the capital due at term.Monthly interest-only payment: $1,300Open the calculator Finance & FinTechLoan CalculatorEstimate repayments and total interest for a fixed-rate personal or business loan.You'd pay each month: $630Open the calculator Finance & FinTechEMI CalculatorCalculate an equated monthly instalment (EMI), total interest and total repayment for a fixed-rate loan.Estimated monthly EMI: $630Open the calculator Finance & FinTechCar Loan CalculatorEstimate monthly car-finance repayments, interest cost and total amount repaid after a deposit or trade-in.Estimated monthly payment: $630Open the calculator Finance & FinTechCompound Interest CalculatorProject how a lump sum and regular contributions can grow when returns compound over time.After 10 years you'd have: $74,000Open the calculator Finance & FinTechInvestment CalculatorEstimate future investment value from a starting amount, regular contributions, expected return and time horizon.Estimated future value: $90,000Open the calculator Finance & FinTechCurrency ConverterConvert an amount at today's live mid-market rate across 150+ currencies, or enter a rate you've been quoted to see what it works out to.Live rates: 150+ currenciesOpen the calculator Finance & FinTechPercentage CalculatorCalculate a percentage of a number, the percentage one value is of another, or the percentage change between two values.25% of 200: 50Open the calculator Finance & FinTechSavings CalculatorProject a savings balance from a starting amount, regular deposits, interest rate and saving period.Projected savings balance: $28,000Open the calculator Finance & FinTechInvestment Growth CalculatorProject investment growth with a starting balance, monthly contributions and an assumed annual return.After 15 years you'd have: $170,000Open the calculator Finance & FinTechStock Return CalculatorCalculate share-investment return from purchase price, current or sale price, shares, dividends and fees.Your total return: 33.5%Open the calculator Finance & FinTechDividend CalculatorEstimate annual dividend income and dividend yield from shares held, dividend per share and share price.Your yearly dividend income: $190Open the calculator Finance & FinTechDividend Reinvestment CalculatorModel how reinvesting dividends can increase share count, portfolio value and future dividend income over time.Estimated portfolio value: $30,000Open the calculator Finance & FinTechInflation CalculatorEstimate how inflation changes future prices and the purchasing power of today’s money.In 10 years the same things cost: $1,700Open the calculator Finance & FinTechAPR CalculatorEstimate the effective annual percentage rate of a loan after interest and upfront fees.Estimated effective APR: 12.6%Open the calculator Finance & FinTechInterest Rate CalculatorEstimate the annual interest rate implied by a loan amount, repayment amount and term.Estimated nominal annual rate: 9.5%Open the calculator Finance & FinTechCredit Card Interest CalculatorEstimate card interest and repayment time from the balance, APR and monthly payment.Estimated months to repay: 36 monthsOpen the calculator Finance & FinTechDebt Repayment CalculatorEstimate how long a debt takes to repay, total interest and the effect of paying more each month.Estimated months to debt-free: 48 monthsOpen the calculator Finance & FinTechDollar-Cost Averaging CalculatorModel regular investing at changing average prices to estimate units accumulated, cost basis and portfolio value.Estimated current value: $11,000Open the calculator Finance & FinTechCrypto Profit CalculatorCalculate crypto profit or loss from buy price, sell/current price, quantity and trading fees without requiring live market data.Profit / loss: $3,700Open the calculator Business & Start-upsROI CalculatorMeasure return on investment from cost and gain, including percentage and absolute profit or loss.Return on investment: 35%Open the calculator Business & Start-upsProfit Margin CalculatorCalculate net profit and profit margin from revenue and total costs.Net profit margin: 25%Open the calculator Business & Start-upsBusiness Valuation CalculatorEstimate an indicative business value from earnings or revenue, a chosen multiple, debt and surplus cash.Indicative equity value: $2,500,000Open the calculator Business & Start-upsStartup Valuation CalculatorCalculate pre-money and post-money valuation from an investment amount and the equity offered.Pre-money valuation: $5,600,000Open the calculator Business & Start-upsInvoice GeneratorCreate a professional A4 invoice with an optional logo, itemised charges, tax and payment details.Open the tool Business & Start-upsBreak-Even CalculatorCalculate break-even units and break-even revenue from fixed costs, selling price and variable cost per unit.Units to break even: 834 unitsOpen the calculator Business & Start-upsRevenue Growth CalculatorCalculate revenue growth or decline between two periods.Revenue growth: 30%Open the calculator Business & Start-upsGross Margin CalculatorCalculate gross profit and gross margin from revenue and cost of goods sold.Gross margin: 40%Open the calculator Business & Start-upsMarkup CalculatorCalculate selling price and gross profit from cost and target markup.Markup: 66.7%Open the calculator Business & Start-upsBurn Rate CalculatorCalculate monthly gross spending, net cash burn and a simple runway estimate from cash, monthly expenses and monthly income.Net burn each month: $63,000Open the calculator Business & Start-upsRunway CalculatorEstimate how many months cash will last at the current net burn rate.Months of runway: 10 monthsOpen the calculator Business & Start-upsARR CalculatorCalculate annual recurring revenue from the number of paying customers and their average monthly or yearly subscription price.Annual recurring revenue: $370,000Open the calculator Business & Start-upsMRR CalculatorCalculate monthly recurring revenue from recurring subscriptions and plan values.Monthly recurring revenue: $63,000Open the calculator Business & Start-upsSaaS Metrics CalculatorSee ARR, average revenue per customer, simplified lifetime value and monthly surplus from subscription business inputs.Annual recurring revenue: $750,000Open the calculator Business & Start-upsCAC CalculatorCalculate customer acquisition cost from sales and marketing spend and new customers acquired.Customer acquisition cost: $250Open the calculator Business & Start-upsLTV CalculatorEstimate simplified subscription customer lifetime value from average monthly revenue, gross margin and monthly churn.Estimated customer LTV: $5,000Open the calculator Business & Start-upsLTV:CAC Ratio CalculatorCompare customer lifetime value with acquisition cost and calculate the LTV:CAC ratio.LTV:CAC ratio: 3.33:1Open the calculator Business & Start-upsChurn Rate CalculatorCalculate customer churn rate from customers at the start of a period and customers lost.Churn rate: 2.5%Open the calculator Business & Start-upsFounder Equity CalculatorModel a simple founder equity split using contribution weights such as cash, time, idea, sales and product work.Founder A modelled ownership: 54%Open the calculator Business & Start-upsEquity Dilution CalculatorCalculate ownership dilution after a new investment round or share issue.Your ownership after the round: 48%Open the calculator Web & SecurityWebsite Speed TestCheck whether a page is up, how fast it responds, and its Core Web Vitals when Google has them.Open the tool Web & SecuritySSL CheckerInspect a site’s TLS certificate, issuer, subject, validity dates and days remaining where the host allows certificate inspection.Open the tool Web & SecurityRedirect CheckerFollow a URL’s redirect chain and show each HTTP hop until the final destination.Open the tool Web & SecurityWebsite Security CheckerCheck HTTPS, security headers, mixed content and warning signs in the address itself, such as hidden logins and look-alike domains.Open the tool Web & SecurityBroken Link CheckerScan links found on one public page and test a controlled sample for broken or failing destinations.Open the tool SEO & MarketingWebsite SEO CheckerCheck a page the way a search engine reads it: title, description, headings, images, canonical, robots, sharing tags and structured data, in one pass.Open the tool SEO & MarketingSERP Preview ToolPreview how a title, URL and meta description may appear in a search result before publishing.Open the tool SEO & MarketingUTM BuilderBuild a campaign URL with standard UTM source, medium, campaign, term and content parameters.Open the tool SEO & MarketingQR Code GeneratorGenerate a downloadable QR code for a URL or short text locally in your browser, without sending the value to an external rendering service.Open the tool SEO & MarketingAI Search Readiness CheckerCheck observable page, metadata, structured-data and crawler-access signals relevant to search and AI-assisted discovery, without claiming to predict 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Every tool, grouped by the decision it helps with, with the questions people ask along the way.
7 toolsLoans and debtMonthly payments, true APR and total cost for personal, car and student loans; the fastest way out of credit-card debt; and whether consolidating, transferring or overpaying actually saves money.Open the guide 4 toolsBudgeting and savingSplit your pay with the 50/30/20 rule, size an emergency fund, hit a savings goal by a date and see what compound interest and inflation do to money over time.Open the guide 4 toolsInvestingGrowth of a lump sum or regular investment, real returns after fees and inflation, portfolio risk and rebalancing, and the maths behind bonds, fund fees and dollar-cost averaging.Open the guide 3 toolsStocks and dividendsProfit on a share trade after costs and tax, dividend yield and income, reinvestment growth, intrinsic value by discounted cash flow, and whether a dividend is safe.Open the guide 6 toolsStartup fundraising and equityValuation methods, SAFE and convertible note conversion, cap tables, dilution, option pools, liquidation preferences, burn rate and runway.Open the guide 7 toolsSaaS metricsARR and MRR, CAC and LTV, churn and net revenue retention, payback, magic number, quick ratio, rule of 40, pricing and trial conversion: the numbers investors and operators track.Open the guide 6 toolsBusiness finance and pricingMargins and markup, break-even, discounts, invoices, working capital, and the true cost of business borrowing from term loans to factoring and merchant cash advances.Open the guide 11 toolsMarketing and website toolsReturn on ad spend, A/B test significance, email ROI, plus free checks for site speed, SSL, redirects, broken links, security headers, SEO basics, SERP previews and AI search readiness.Open the guide