The most popular tools on MayoCalc, organized by what you're trying to figure out.
Enter your age, savings, and contributions to see if you're on track to retire when you want to.
Historical backtesting against every market period since 1871. Variable withdrawal strategies, fee drag, and Monte Carlo simulation.
See how your money grows over time with regular contributions and compound returns.
Benchmarks for how much you should have saved at 30, 40, 50, and 60. Plus what to do if you're behind.
2026 contribution limits, income limits, and how to decide which account fits your situation.
Monthly payment estimate based on loan amount, interest rate, and term.
Enter your income, debts, and down payment to see what price range makes sense.
Check your DTI ratio. Lenders typically want it under 43% for mortgage approval.
Full month-by-month schedule showing principal vs interest on every payment.
The real math behind the biggest financial decision most people make.
Gross-to-net for any state. Federal brackets, state tax, FICA, and pre-tax deductions.
See your marginal and effective federal tax rate for 2026.
What your annual salary actually works out to per hour, adjusted for your real work hours.
All 50 states ranked by how much of your paycheck you actually keep.
Enter your CAC score for exact MESA percentile by age, sex, and ethnicity. Our most-visited tool.
Full 12-variable risk prediction including coronary age.
Categorize your reading and understand what each range means.
Complete MESA reference tables for all 8 demographic groups.
Your TDEE and calorie targets for weight loss, maintenance, or muscle gain.
Protein, carbs, and fat targets based on your goals and activity level.
How many grams per day based on your body weight and activity.
Body Mass Index with age-adjusted context and healthy range guidance.
The science of calorie needs, explained without the noise.
Compare your income and wealth to the rest of the world. Sobering and motivating.
Everything you own minus everything you owe. The single best measure of financial health.
Federal Reserve data on where Americans actually stand, median and average, by decade.
FICO ranges, what they cost you in interest, and 7 ways to raise yours.
MayoCalc has 210+ calculators covering finance, health, math, everyday life, and fun. Browse the full list on the homepage, or check out all 49 guides and articles.