Math, finance, health, and everyday tools - with real formulas, detailed results, and a clean interface.
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Calculate payments and total interest for amortized loans, deferred payment loans, and bonds.
Calculate monthly payments, total interest, and full amortization for your car loan.
See how extra or biweekly payments save interest and shorten your mortgage term.
Find sales commission from price and rate, or use the tiered commission calculator.
See how long it takes to pay off a card balance, or the payment needed to clear it in time.
Estimate your monthly payment, VA funding fee, loan amount, total interest, and amortization.
Estimate your monthly payment, upfront and annual mortgage insurance (MIP), and total interest.
Analyze cash flow, cap rate, cash-on-cash return, IRR, and total profit on a rental investment.
Find your available equity and estimate monthly payments on a home equity loan.
Estimate your home equity line of credit payments during draw and repayment periods.
Calculate tax amounts and reverse-calculate pre-tax prices from any US state rate.
Calculate present value, future value, and total interest for annuities.
Estimate annuity payout amounts for a fixed term or how long a fixed payout will last.
Project investment growth with compound interest and regular contributions.
Calculate return on investment (ROI) and annualized ROI from your invested and returned amounts.
Find simple interest and end balance, or solve for principal, rate, or term, with a full schedule.
Time value of money solver: find FV, PV, payment, interest rate, or number of periods.
See how your savings grow from deposits and contributions with compound interest.
Estimate your monthly car lease payment and compare leasing to buying the same vehicle.
Convert any salary to hourly, weekly, monthly, and annual equivalent pay rates.
Calculate break-even point and savings from refinancing your mortgage.
Calculate the equivalent purchasing power of money across any years using U.S. CPI data from 1913 to 2024.
Get your full amortization schedule with monthly payment, total interest, and year-by-year breakdown.
Calculate your monthly loan payment for any term, or find out how long to pay off a loan with fixed payments.
Calculate compound interest growth with contributions, tax, and inflation adjustments.
Find your debt-free date using the avalanche method. Model extra monthly, yearly, or one-time payments.
Compare your current debts to a consolidation loan. See monthly savings and total interest saved.
Estimate your actual paycheck after federal income tax, Social Security, Medicare, state tax, and deductions.
Find out how much you need to retire, how much to save, and how long your money will last.
Compare Roth IRA growth vs. a taxable account. See projected balance, taxes saved, and year-by-year schedule.
Calculate monthly payments, total interest, payoff date, and real APR for any personal loan.
Calculate business loan payments, total interest, real APR, and full amortization schedule.
See how much house you can afford based on your income and debts, or a fixed monthly budget.
Estimate payments, total interest, and payoff time, plan extra payments, and project your balance after graduation.
Plan your personal budget with income and expenses to see your net surplus or deficit, DTI ratio, and spending breakdown.
Find the sale price after a percent-off or fixed-amount-off discount and how much you save.
Compare the retirement value of a Traditional IRA, Roth IRA, and a taxable account.
Find the internal rate of return (IRR) from a fixed or irregular series of cash flows.
Estimate your 2025 or 2026 federal income tax refund or amount owed.
Find the present value of a future sum or a series of periodic deposits.
Project your 401(k) balance at retirement, with employer match and early withdrawal costs.
Calculate your body fat percentage, category, lean mass, fat mass, and ideal body fat for your age.
Calculate your Body Mass Index, BMI Prime, category, and healthy weight range.
Find your daily calorie needs based on BMR and activity level using Mifflin-St Jeor.
Estimate your Total Daily Energy Expenditure and calorie targets for weight loss or gain.
Find your daily protein, carb, and fat targets in grams for your goal.
Estimate your Basal Metabolic Rate and daily calorie needs by activity level.
Estimate your ideal body weight from the Robinson, Miller, Devine, and Hamwi formulas.
Calculate exact age in years, months, days, hours, minutes, and seconds.
Predict a child's adult height or check height percentile using CDC data.
Find your due date, gestational age, trimester, and full week-by-week pregnancy schedule.
Estimate your most fertile days, ovulation date, fertile window, and due date if pregnant.
Predict your next periods and most probable ovulation days for the next 6 cycles.
Estimate your pregnancy due date from your last period, ultrasound, conception, or IVF date.
Estimate when a baby was conceived from a due date, last period, or ultrasound.
Find your recommended pregnancy weight range and weekly weight-gain schedule by BMI.
Find a percentage of a number, percentage difference, and percentage change.
Add, subtract, multiply, or divide fractions with step-by-step solutions.
Find population or sample standard deviation, variance, and mean with steps.
Solve sides, angles, area, and perimeter of a right triangle from any two values.
Solve any triangle from 3 values: sides, angles, area, heights, medians, and more.
Volume of a sphere, cone, cube, cylinder, tank, capsule, frustum, ellipsoid, and more.
Calculate your GPA or find the grade needed to reach your target GPA.
Find probabilities of two events, a series of events, or a normal distribution.
Find the confidence interval and margin of error for a population mean from your sample.
Add, subtract, multiply, and divide binary numbers, and convert between binary and decimal.
Find the mean, median, mode, range, geometric mean, sum, and count of a data set.
Add up weekly work hours from clock-in/out times, deduct breaks, and calculate pay with overtime.
Find the number of hours and minutes between two times or between two full dates.
Find the duration between two times or add/subtract time from a start time.
Add, subtract, multiply, or divide time values in days, hours, minutes, seconds.
Calculate running pace, speed, or finish time for any race distance.
Find the number of days between two dates, or add and subtract from any date.
Estimate the heating and cooling BTUs needed for a room or house.
Find network address, broadcast address, usable hosts, and more from any IP/CIDR.
Calculate trip fuel cost and required fuel for any distance, efficiency, and gas price.
Calculate dew point, relative humidity, or air temperature. Also shows absolute humidity and comfort level.
Find density, mass, or volume with the formula density = mass / volume and many unit options.
Estimate your blood alcohol content from your weight, time, and the drinks you consumed.
Estimate roof area from base area and pitch, plus the shingles, roll roofing, and felt needed.
Estimate concrete volume, weight, and bags for slabs, footings, columns, curbs, and stairs.