EvvyTools Blog
Smart guides, how-tos, and tool deep dives. Better decisions start with better understanding.
How-To Guides
How to Calculate Your Real Electricity Cost Per Appliance (And Find Where Your Bill Is Leaking Money)
Figure out exactly what each appliance costs you per month and where your electricity bill is actually going.
Financial Literacy
How to Calculate Your Quarterly Estimated Taxes (And Avoid Penalties)
A practical guide to calculating quarterly estimated taxes, understanding safe harbor rules, and avoiding IRS underpayment penalties as a freelancer.
Financial Literacy
What Your Mortgage Payment Actually Covers and How to Calculate the Real Monthly Cost
Learn what really goes into a mortgage payment beyond P and I, and how to compare loan scenarios before you commit.
Financial Literacy
How to Calculate Your Freelance Hourly Rate (Because You Are Probably Undercharging)
A step-by-step method for calculating the freelance hourly rate you actually need to hit your income goals.
Financial Literacy
How to Calculate Your FIRE Number and What It Actually Takes to Reach Financial Independence
Find your FIRE number and see how savings rate, not income, determines when you reach financial independence.
Health & Wellness
Intermittent Fasting by the Numbers - What Happens at Every Hour and How to Plan Your Schedule
A science-backed guide to intermittent fasting protocols, metabolic zones, and how to build a schedule that works.
Financial Literacy
How Compound Interest Actually Works, and Why Starting Early Matters More Than Starting Big
See how compound interest turns small monthly investments into serious money over time with real numbers and examples.
How-To Guides
How to Run Statistics Without Installing R, SPSS, or Opening a Spreadsheet
Run descriptive stats, hypothesis tests, and regression analysis in your browser without installing R or Excel.
Tool Deep Dives
How to Write Regex Patterns That Work in Production (Not Just in Tutorials)
A practical guide to writing regex patterns that work, with real examples for email validation, URL parsing, and more.
How-To Guides
How to Make Perfect Pizza Dough Using Baker's Percentages Instead of Cup Measurements
Master baker's percentages to nail your pizza dough recipe every time, whether you make Neapolitan, New York, or Detroit style.
Tool Deep Dives
Why "P@ssw0rd123!" Is Terrible and How to Generate Passwords That Actually Resist Cracking
Understand password entropy, why length matters more than special characters, and how to generate truly secure passwords.
Health & Wellness
How to Calculate Your Running Pace, Predict Race Times, and Build a Split Strategy That Works
Find your pace per mile, predict finish times across distances, and plan your race day split strategy.