Browse our complete collection of free online calculators. Filter by category or search to find what you need.
Calculate your monthly mortgage payment including principal, interest, taxes, and insurance. Free mortgage calculator updated for 2026.
Finance & MortgageCalculate your Body Mass Index (BMI) instantly. Free BMI calculator for adults with health category breakdown.
Health & FitnessCalculate compound interest on your savings or investments. See how your money grows over time with our free calculator.
InvestmentCalculate your monthly car payment, total cost, and interest for new or used vehicle financing.
Auto & Real EstateCalculate your take-home pay after federal tax, Social Security, and Medicare. See your net pay for any pay frequency.
Tax & SalaryCalculate hourly take-home pay with regular hours, overtime, pay frequency, state tax, and deductions.
Tax & SalaryCompare the same salary across 2 to 4 states and see annual, monthly, and biweekly take-home pay differences.
Tax & SalaryCompare two job offers by after-tax pay, bonus, state tax, and monthly cost differences.
Tax & SalaryCompare two offers by salary, state, pay frequency, 401(k), health insurance, bonus, commute, and rent.
Tax & SalaryEstimate how remote work in another state can change salary after tax and monthly cash flow.
Tax & SalaryCompare salary after tax before and after a move, including state tax and monthly cost changes.
Tax & SalaryEstimate how traditional 401(k) contributions change take-home pay and per-paycheck cash flow.
Tax & SalaryCompare 0%, 5%, 10%, and 15% traditional 401(k) contributions by paycheck impact and annual savings.
Tax & SalaryEstimate how HSA payroll contributions affect take-home pay, FICA, and tax savings.
Tax & SalaryEstimate how much of a work bonus you keep after federal tax, FICA, and state tax models.
Tax & SalaryEstimate overtime pay after taxes using hourly rate, overtime hours, federal tax, FICA, and state tax models.
Tax & SalaryEstimate your 2026 federal income tax, see your effective rate, and get a bracket-by-bracket breakdown. Free tax calculator.
Tax & SalaryCalculate how many calories to eat to lose weight. See your TDEE, daily target, and estimated goal date using the Mifflin-St Jeor equation.
Health & FitnessProject your retirement savings with compound growth. See yearly breakdown of contributions and investment returns.
InvestmentCalculate the tip, total bill, and per-person split instantly. Quick percentage buttons and comparison table included.
Math & ConversionCalculate percentages three ways: X% of Y, X is what % of Y, and percentage change. The most versatile percentage tool online.
Math & ConversionCalculate monthly loan payments, total interest, and view a full month-by-month amortization schedule for any loan.
Finance & MortgageConvert between annual, monthly, biweekly, weekly, daily, and hourly pay. Enter any value, see all others instantly.
Tax & SalaryEstimate your term life insurance monthly premium based on age, gender, health status, and coverage amount.
InsuranceEstimate your ACA marketplace health insurance premium and subsidy eligibility based on age, income, and plan type.
InsuranceEstimate how employer health insurance premiums reduce each paycheck with pre-tax payroll treatment.
InsuranceCalculate gross margin, net margin, and markup percentage. Free profit margin calculator for businesses.
BusinessCalculate return on investment, net profit, and annualized ROI for any investment. Free ROI calculator.
BusinessCalculate your daily macros — protein, carbs, and fat — based on your goals using the Mifflin-St Jeor equation.
Health & FitnessCalculate your estimated due date from your last menstrual period or conception date. See your current trimester and milestones.
Health & FitnessCalculate your exact age in years, months, days, weeks, and hours. Find your next birthday and the day of the week you were born.
Math & ConversionCalculate your GPA from course grades and credit hours. Add any number of courses to find your cumulative GPA.
Math & ConversionConvert length, weight, temperature, volume, and area instantly. Free unit converter for everyday measurements.
Math & ConversionCalculate the exact difference between two dates in years, months, weeks, and days. Great for age checks, countdowns, and project planning.
Everyday LifeCalculate the duration between two times in hours and minutes. Perfect for work shifts, time tracking, and schedules that cross midnight.
Everyday LifeCalculate sale price, total savings, and effective discount percentage. Includes stacked discounts for retail and ecommerce pricing.
Everyday LifeAdd or remove sales tax or VAT from any amount. See subtotal, tax amount, and final total instantly.
Tax & SalaryEstimate how much house you can afford based on your income, debts, rate, down payment, taxes, and insurance.
Finance & MortgageBuild a monthly budget from take-home pay, including rent targets, 50/30/20 categories, debt payments, and housing guardrails.
Finance & MortgageSee how extra mortgage payments affect your payoff date and total interest. Free mortgage overpayment calculator.
Finance & MortgageEstimate how long it takes to pay off your credit card balance and how much interest you will pay along the way.
Finance & MortgageEstimate APR from loan amount, fees, monthly payment, and term. Compare financing offers using annual percentage rate.
Finance & MortgageCalculate personal-loan monthly payment, origination fees, total interest, and effective APR before you apply.
Finance & MortgageCalculate your front-end and back-end debt-to-income ratios for mortgage approval and monthly debt planning.
Finance & MortgageEstimate how much emergency savings you need based on essential monthly expenses and your target coverage in months.
Finance & MortgageEstimate your Basal Metabolic Rate using the Mifflin-St Jeor equation. See your resting calorie needs instantly.
Health & FitnessCalculate your Total Daily Energy Expenditure and get maintenance, cut, and lean-bulk calorie targets.
Health & FitnessEstimate body fat percentage, fat mass, and lean mass using the U.S. Navy circumference method.
Health & FitnessCalculate your current class grade from assignment scores and weights. Great for coursework, quizzes, and project-based grading.
EducationFind the score you need on your final exam to hit your target course grade. Quick weighted final grade calculator.
EducationCalculate how much you need to save each month to hit a target balance by a chosen deadline.
InvestmentEstimate future cost, buying power, and cumulative inflation for any amount over time.
InvestmentAdd up assets and subtract liabilities to estimate your personal net worth and balance-sheet health.
InvestmentCalculate percentage increase or decrease between two values and see the absolute change instantly.
Math & ConversionCalculate your stock trade profit or loss including commissions. See ROI, break-even price, and per-share profit instantly.
TradingCalculate the optimal number of shares or units to trade based on your account size, risk tolerance, and stop loss. Essential risk management tool.
TradingCalculate the value of a pip for any forex currency pair and lot size. Essential tool for forex traders managing risk.
TradingCalculate your cryptocurrency trade profit or loss including exchange fees. See net return and ROI for any crypto trade.
Trading