🧮 Free Online Calculators

Free Online Calculators — 20+ Financial & Health Tools

20+ free online calculators: BMI, loan, mortgage, age, GPA, tip, compound interest and more. Instant results, no signup.

18 tools available
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BMI Calculator
Body Mass Index with category
🎂
Age Calculator
Exact age in years & months
🏦
Loan Calculator
Monthly payment & interest
🏠
Mortgage Calculator
Monthly payment estimator
🍽️
Tip Calculator
Split bills, calculate tips
%%
Percentage Calc
Percent of, change, discount
📈
Compound Interest
Investment growth estimator
💹
ROI Calculator
Return on investment instantly
💰
Salary Calculator
Hourly to annual pay converter
🏖️
Retirement Calculator
Estimate savings needed
🎓
GPA Calculator
Grade point average instantly
🏷️
Discount Calculator
Sale price & savings finder
📅
Days Between Dates
Count days, weeks, months
🥗
Calorie Calculator
Daily calorie needs by age
💧
Water Intake Calc
Daily hydration guide
😴
Sleep Calculator
Best bedtime & sleep cycles
🌸
Ovulation Calculator
Fertile window & cycle
🤰
Pregnancy Calculator
Due date & week-by-week
← View all 200+ free tools