Basic Excel formulas everyone should know
The most-used Excel formulas with examples: SUM, AVERAGE, COUNT, IF, COUNTIF, SUMIF, VLOOKUP and CONCAT, plus how to write a formula step by step.
Clear answers for your money, your computer and your home.
Step-by-step guides and free tools: U.S. personal finance, tech and Excel, artificial intelligence, ecommerce, home, beauty and careers. In English and Spanish, based on official sources, no fine print.
Popular topics:ScreenshotChatGPTVLOOKUPResumeITINBuild credit
Explore by topic
Each section starts with the basics and builds step by step.
- Personal financeBudgeting and saving5 guides
- CreditScores and reports4 guides
- Credit cardsAPR, interest and payments4 guides
- BankingAccounts and protection5 guides
- LoansRates, terms and cost3 guides
- MortgagesBuying a home2 guides
- TaxesITIN, filing and refunds4 guides
- Retirement & investing401(k), IRA and Social Security2 guides
- Technology & computersPC, phone, Excel and apps10 guides
- Artificial intelligenceWhat it is and how to use it2 guides
- EcommerceSelling online2 guides
- Home, cleaning & cookingPractical home tips4 guides
- Beauty & styleLashes, care and style3 guides
- Careers & learningResumes, English and skills1 guide
- InsuranceHealth, auto and life1 guide
- Small businessBusiness finances1 guide
Featured guides
See all guidesMoney calculators
All 58 tools- Personal loan calculatorMonthly payment and total cost
- Mortgage calculatorEstimated monthly payment
- Auto loan calculatorMonthly car payment
- Compound interest calculatorGrowth over time
- Credit card payoff calculatorTime and interest to get out of debt
- Debt payoff calculator (avalanche vs. snowball)Plan to become debt-free
- 401(k) retirement calculatorWhat you could have at retirement
- Hourly to salary calculatorHourly, weekly, monthly and yearly
Everyday tools
All 58 tools- Percentage calculatorPercentages made easy
- Unit converterPounds to kg, miles to km and more
- Word and character counterWords, characters and reading time
- Currency converter: dollar, peso, euro and moreExchange rates updated daily
- Paycheck calculator 2026 (take-home pay)Your take-home pay after taxes
- Mexico aguinaldo (Christmas bonus) calculatorYour legal year-end bonus in Mexico
- Cups to grams converter for bakingFlour, sugar, butter and more
- BMI calculator (body mass index)Adult BMI with CDC categories
Starting from zero
Beginner-friendly guides: money in the U.S., your computer and phone, AI and work.
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How we work
Official sources. Each guide cites official and manufacturer sources (CFPB, IRS, FTC, FDA, USDA, Microsoft, Google, Apple) with links to every one.
Editorial review. Every guide is fact-checked before publication. Our methodology.
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