EvvyTools Blog
Smart guides, how-tos, and tool deep dives. Better decisions start with better understanding.
Financial Literacy
How to Calculate Your Startup Runway (And What to Do When It Is Shrinking)
A startup's runway is its most important metric. Here is how to calculate yours, model scenarios, and extend it before it shrinks too far.
Health & Wellness
How Your Daily Habits Add or Subtract Years From Your Life
Your daily habits quietly add or subtract years from your life. Here is how to estimate your personal life expectancy and make changes.
How-To Guides
How to Scale a Recipe Up or Down the Right Way
A practical guide to scaling recipes up or down, including the ingredients that never scale linearly and how to adjust pan size.
Financial Literacy
How to Calculate the True Cost of Hiring an Employee Before You Commit
A complete breakdown of every cost behind hiring an employee, from payroll taxes and benefits to equipment, PTO, and overhead.
Financial Literacy
How to Calculate What Your Auto Loan Really Costs Before You Sign
Calculate your true auto loan cost before you sign. Compare financing options and avoid the hidden traps in dealer financing.
Health & Wellness
Keto Macro Calculator: How to Set Your Fat, Protein, and Carb Targets Right
Calculating keto macros with a generic ratio usually fails. Here is how to find the fat, protein, and carb targets that actually fit your body.
Financial Literacy
How to Calculate Flooring Materials for Any Room
A practical guide to calculating flooring materials accurately, so you buy the right amount without overspending or running short.
Tool Deep Dives
How to Build a Consistent Web Color System Using HEX, RGB, and HSL
A practical guide to converting between web color formats, generating harmonious palettes, and building a consistent color system for any project.
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.