Guides
Use tools the right way
Practical knowledge behind the tools. Pick what you need, when you need it.
Character Counts, Fully ExplainedSpaces, bytes, and SMS limits. How to count characters for resumes, bios, and posts.2026-09-19 · Character Counter3 Percent Formulas for Daily LifeRatios, change, and discounts. Three formulas cover nearly every percent calculation.2026-09-19 · Percent CalculatorEqual Installment vs Equal PrincipalSame loan, hundreds different in total interest depending on the method.2026-09-19 · Loan CalculatorMaking QR Codes & Spotting FakesURL and Wi-Fi QR codes, plus how to tell a phishing QR apart.2026-09-19 · QR Code GeneratorEveryday Unit ConversionsInches, pounds, gallons, and temperatures. The conversions worth memorizing.2026-09-19 · Unit Converter