Money & numbers, explained
Original, plain-English guides with worked examples you can verify in our calculators.
What Does “6-7” Mean? How a Number Became a Word of the Year
The origin, spread and business lessons of the viral 6-7 meme that Dictionary.com named its 2025 Word of the Year.
6 min read
Numbers & CultureLucky Numbers in Business: Why 8 Sells and 4 Is Avoided
How cultural number symbolism shapes prices, phone numbers, addresses and domains — with practical rules for global businesses.
7 min read
MoneyCompound Interest Explained: The Math That Builds (or Destroys) Wealth
A plain-English guide to compound interest with worked numbers, the Rule of 72, and how it works against you on debt.
7 min read
BusinessBreak-Even Analysis: Know Your Survival Number Before You Launch
How to calculate break-even units and revenue, read contribution margin, and use the result to set prices.
6 min read
BusinessMargin vs Markup: The Pricing Mistake That Quietly Kills Profit
Why a 50% markup is only a 33% margin, with conversion tables and pricing rules.
5 min read
Websites & AIHow Much Can a Website Earn? Traffic, RPM and Valuation Math
The equations behind content-site revenue: pageviews, RPM, affiliate funnels, lead value — and how sites are valued at sale.
7 min read
Websites & AIWhat AI Really Costs a Small Business: Tokens, Seats and ROI
A practical framework for budgeting AI tools and APIs, estimating token costs and proving return on investment.
7 min read
BusinessRunway, Burn Rate and How Long Your Cash Really Lasts
Calculate gross and net burn, model revenue growth, and decide when to fundraise or cut.
6 min read
BusinessUnit Economics: The 7 Numbers Every Founder Should Know
CAC, LTV, payback, churn, gross margin, conversion rate and break-even — what they mean and healthy ranges.
6 min read
Websites & AIDomain Investing by the Numbers: Renewals, Sell-Through and Real Returns
The portfolio math of buying, holding and selling domain names — and why numeric domains are a category of their own.
6 min read