Calculators
Fast, transparent calculators for money, health, school, and everyday math. Compute loan payments, mortgage amortization, compound interest growth, BMI, tips, discounts, and date differences, with the formulas shown so you can trust the numbers. Every calculator runs entirely in your browser; results are estimates for planning, not professional financial or medical advice. No accounts, no ads disguised as results, just answers.
Age CalculatorYour exact age, total days alive and next birthday countdown.
Average CalculatorMean, median, mode, range and standard deviation from any list.
BMI CalculatorCheck your body mass index with metric or imperial units.
BMR CalculatorEstimate daily calorie burn with the Mifflin-St Jeor equation.
Break-Even CalculatorHow many units must you sell to cover your costs?
Calorie CalculatorEstimate daily calories for your goal.
Compound Interest CalculatorWatch savings grow with a year-by-year growth table.
Days Between Dates CalculatorCount the days, weeks or weekdays between any two dates.
Discount CalculatorSee the final sale price and exactly how much you save.
Loan CalculatorMonthly payment, total interest and amortization schedule.
Mortgage CalculatorMonthly P&I plus tax, insurance and HOA in one total.
Number to Words ConverterTurn any number into English words.
Percentage CalculatorWork out percentages, increases and decreases instantly.
Profit Margin CalculatorMargin vs. markup, explained in plain English.
ROI CalculatorReturn on investment with optional annualized (CAGR) view.
Salary ConverterConvert hourly wage to annual salary and back.
Sales Tax CalculatorAdd tax to a price, or back it out of a tax-inclusive total.
Split Bill CalculatorSplit the check evenly with tax and tip included.
Tip CalculatorFigure the tip, total and each person's share in seconds.