Free Online Calculators for Finance, Math & Health
Eliminate guesswork with our suite of precision calculation tools. Whether you need to forecast loan payments, analyze business margins, or track health metrics, our free utilities provide instant, accurate results directly in your browser. No downloads, no formulas to memorize—just simple inputs and immediate answers.
Available Online Calculators
Age Calculator
Determine your precise age in years, months, days, and hours from your date of birth.
Calculate Age →Percentage Calculator
Compute percentage increases, decreases, and convert fractions to percentages instantly.
Get Percentage →Average Calculator
Find the mean, median, mode, and range for any dataset for quick statistical analysis.
Calculate Average →Confidence Interval
Determine confidence intervals and margins of error for accurate data interpretation.
Analyze Data →Sales Tax Calculator
Calculate final pricing by adding or reversing sales tax rates for any purchase.
Calculate Tax →Margin Calculator
Optimize business pricing by calculating profit margins, markup, and revenue costs.
Check Margins →Probability Calculator
Evaluate statistical outcomes including event probability, combinations, and permutations.
Calculate Odds →PayPal Fee Calculator
Estimate transaction fees and net payout amounts for domestic and international transfers.
Check Fees →Discount Calculator
Determine final sale prices and total savings after applying percentage or fixed discounts.
Calculate Savings →CPM Calculator
Plan ad budgets by calculating Cost Per Mille (thousand impressions) for campaigns.
Calculate CPM →Loan Calculator
Simulate loan repayment scenarios with monthly breakdowns, interest totals, and amortization.
Plan Loan →GST Calculator
Compute Goods and Services Tax (GST) for inclusive or exclusive pricing models.
Calculate GST →Days Calculator
Count the exact number of days between two dates or add/subtract days from a specific date.
Count Days →Hours Calculator
Calculate time duration between two points or adjust time by adding/subtracting hours.
Calculate Time →Month Calculator
Determine the interval in months between dates or forecast future dates by adding months.
Count Months →Stripe Fee Calculator
Calculate Stripe processing fees to determine exact net income from client payments.
Check Stripe Fees →Calorie Calculator
Estimate daily caloric requirements based on biometrics like age, weight, and activity level.
Check Calories →TDEE Calculator
Calculate Total Daily Energy Expenditure to set accurate goals for weight loss or muscle gain.
Calculate TDEE →