101 free calculators across finance, health, math, and tools. No sign-up required.
Mortgage, loans, investments, salary, and more
Calculate monthly payments, total interest, and full amortization schedule for any loan.
Calculate SBA 7(a) loan payments with current prevailing interest rates, guarantee fees, and full amortization schedule.
Estimate your monthly mortgage payment including principal, interest, taxes, and insurance.
Compare the true financial cost of renting versus buying a home over time.
Convert your salary between annual, monthly, weekly, and hourly rates instantly.
Calculate sales tax, add tips, and split bills easily for any purchase.
See how your money grows over time with the power of compound interest. Includes monthly contributions and multiple compounding frequencies.
Find out how much you need to save for retirement and whether you are on track to meet your goals.
Calculate your take-home pay after federal income tax, Social Security, Medicare, state tax, and 401(k) contributions.
Calculate the return on investment (ROI) and annualized return for any investment, stock, or business venture.
Find out how much you could save by refinancing your mortgage and calculate your break-even point.
Calculate the tip amount and total bill instantly. Split the bill evenly among any number of people.
Calculate the gas cost for any trip. Enter distance, fuel economy, and gas price to find your total fuel expense.
Convert between 20 major world currencies with up-to-date reference exchange rates. Fast, free, and no sign-up required.
Calculate the real value of money over time using historical US CPI data. See how inflation has eroded purchasing power since 1960.
Calculate VA home loan payments, funding fees, and affordability. Designed for veterans, active-duty service members, and surviving spouses.
Calculate how long it will take to pay off your credit card debt and how much interest you will pay. Compare fixed payment vs. payoff date strategies.
Calculate how long it will take to reach your savings goal, or how much you need to save each month to hit a target by a specific date.
Calculate your total net worth by entering your assets and liabilities. Includes debt-to-asset ratio and financial health indicators.
Calculate SBA 504 loan payments with the standard 50/40/10 structure for commercial real estate and major equipment purchases.
Calculate your monthly car payment, total interest, and full amortization schedule. Includes sales tax, trade-in, and down payment.
Calculate how long it will take to pay off your debts using the avalanche (highest rate first) or snowball (lowest balance first) method.
Calculate your home equity loan or HELOC payment, maximum borrowing amount, and combined loan-to-value ratio.
Estimate your business value using 5 methods: earnings multiple, EBITDA multiple, revenue multiple, asset-based, and DCF analysis.
Calculate your break-even point in units and revenue. Find out how many sales you need to cover fixed and variable costs.
Calculate asset depreciation using straight-line, double declining balance, sum of years digits, or units of production methods.
Estimate your annual workers compensation insurance premium based on payroll, job classification code, and experience modifier.
Calculate your new monthly payment, break-even point, and lifetime interest savings from refinancing. Include or exclude any closing cost items and choose which to roll into the loan.
Calculate your VA loan monthly payment with accurate 2025 funding fees based on service type, loan usage count, and down payment. Include or exclude any closing costs and choose which to roll into the loan.
Calculate how much house you can afford based on your income, debts, down payment, and local market conditions using the 28/36 rule.
Calculate your Debt Service Coverage Ratio (DSCR) for SBA 7(a), SBA 504, and commercial loans. Includes business, rental property, and global DSCR modes with lender threshold analysis.
Calculate your Debt-to-Income (DTI) ratio for mortgage and loan qualification. Includes front-end and back-end DTI, lender threshold comparison for conventional, FHA, VA, and USDA loans, and improvement recommendations.
Calculate the capitalization rate (cap rate) for investment properties. Includes NOI calculation, gross rent multiplier (GRM), cash-on-cash return, implied property value from target cap rate, and market benchmark comparison.
Calculate the full return on investment for rental properties. Includes monthly cash flow, cap rate, cash-on-cash return, gross rent multiplier (GRM), DSCR, break-even occupancy, and a 5-year projection with appreciation and rent growth.
Calculate Net Present Value (NPV) and Internal Rate of Return (IRR) for any investment. Enter up to 20 years of cash flows, discount rate, and initial investment to evaluate profitability, payback period, and profitability index.
Calculate the true cost of an early 401k or IRA withdrawal -- including the 10% penalty, federal and state income taxes, net payout, and long-term opportunity cost. Compare Traditional vs. Roth accounts.
Calculate HELOC payments, available credit, draw period interest-only payments, and full repayment period P&I payments. Compare HELOC vs. home equity loan and see total interest cost.
Estimate your Social Security retirement benefit at any claiming age (62-70), calculate break-even age, compare early vs. delayed claiming strategies, and see spousal benefit options.
Calculate the tax cost of converting a Traditional IRA to a Roth IRA, long-term tax-free growth advantage, break-even horizon, and whether conversion makes sense for your situation.
Calculate federal and state capital gains tax on investments, real estate, and business sales. Covers short-term vs. long-term rates, Net Investment Income Tax (NIIT), and net proceeds.
Calculate your take-home pay if overtime income becomes tax-exempt under proposed 2025 legislation. See how much more you could keep from every overtime hour worked.
Calculate your monthly loan payments, total interest, and amortization schedule. Plan your finances effectively and understand your loan costs.
Calculate the total return and annualized return on your investments. Understand your investment growth over time with initial, final, and time period inputs.
Estimate your monthly mortgage payment in Illinois, including principal, interest, property taxes, and insurance. Plan your home purchase.
Should I put my raise in my 401(k)? The RaiseRight calculator shows exactly how much to contribute after a raise, your tax savings, employer match boost, and how much more you will have at retirement. Free, instant, no sign-up.
Compare the Debt Snowball and Debt Avalanche payoff strategies side by side. Enter your debts, add extra monthly payments, and see exactly when each debt is paid off and how much interest you save.
Plan your retirement budget by comparing expected income (Social Security, pension, 401k/IRA withdrawals) against monthly expenses. See your surplus or shortfall and how much savings you need using the 4% withdrawal rule.
Calculate your ideal emergency fund target based on monthly essential expenses and coverage months. See your current gap and exactly how long it will take to reach your goal at your current savings rate.
Find out the optimal age to claim Social Security benefits. Compare claiming at 62, your Full Retirement Age, or 70 -- with break-even crossover ages, COLA adjustments, and cumulative lifetime benefit charts.
Compare the true 5-year cost of leasing vs. buying a car. Accounts for down payments, loan interest, depreciation, residual value, lease fees, and maintenance to show which option saves you more money.
Estimate child support payments based on both parents incomes, custody split, and state guidelines. Covers income shares and percentage-of-income models used across all 50 states.
Calculate your net pay after federal and state taxes, Social Security, Medicare, and pre-tax deductions. Supports all 50 states, all filing statuses, and 401k/HSA/health insurance deductions.
BMI, calories, TDEE, body fat, and more
Calculate your Total Daily Energy Expenditure to know exactly how many calories you burn each day.
Get your personalized daily macronutrient targets for protein, carbs, and fat based on your goals.
Calculate your Body Mass Index and understand what it means for your health.
Estimate your body fat percentage using the U.S. Navy method based on body measurements.
Calculate your Basal Metabolic Rate -- the calories your body burns at complete rest.
Estimate your maximum lifting strength from any rep count using proven formulas.
Estimate calories burned during exercise based on activity type, duration, and body weight.
Find your optimal heart rate zones for fat burning and cardio fitness.
Calculate your estimated due date and key pregnancy milestones based on your last menstrual period or conception date.
Identify your most fertile days and predict your ovulation date based on your menstrual cycle.
Calculate your daily calorie target to lose weight at your desired pace using the Mifflin-St Jeor equation.
Find your ideal body weight based on height and sex using four medically recognized formulas.
Find the best bedtime or wake-up time based on 90-minute sleep cycles to wake up feeling refreshed.
Calculate running pace, finish time, or distance. Includes race projections for 5K, 10K, half marathon, and marathon.
Calculate your 5 personalized heart rate training zones using the Karvonen method or % of max HR. Includes zone descriptions and training guidance.
Calculate your daily water intake recommendation based on body weight, activity level, climate, and special conditions like pregnancy.
Calculate your pregnancy due date and key milestones from your last menstrual period, conception date, or IVF transfer date.
Predict your next period, ovulation date, and fertile window for the next 3-12 cycles based on your cycle length.
Calculate your body fat percentage using the official U.S. Army tape test method. Instantly see if you meet Army weight and body fat standards for your age and gender.
Percentage, fractions, algebra, and more
Calculate percentages instantly -- find what percent of a number is, what percentage one number is of another, or the percentage change between two values.
A full-featured calculator with three modes: Standard for everyday math, Scientific for trigonometry and logarithms, and Engineering for advanced functions.
Calculate your GPA instantly. Enter your courses, grades, and credit hours to get your weighted GPA on a 4.0 scale.
Add, subtract, multiply, and divide fractions instantly. Shows simplified results, mixed numbers, decimals, and step-by-step solutions.
Calculate powers, square roots, nth roots, logarithms, and scientific notation. Includes step-by-step solutions for every calculation.
Convert numbers to and from scientific notation and engineering notation. Supports very large and very small numbers with step-by-step explanations and SI prefix reference.
Convert between Roman numerals and standard numbers instantly. Supports 1 to 3,999 with a full step-by-step breakdown and clickable reference table.
Calculate the number of days between two dates, add or subtract days from any date, and find out what day of the week any date falls on.
Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Includes a bit-length compatibility checker and clickable reference table.
Calculate the value of a base number raised to a fractional exponent. Simplify complex power operations with ease.
Unit converters, date calculators, and more
Calculate your exact age in years, months, days, weeks, and hours -- plus find out how many days until your next birthday.
Convert between units of length, weight, temperature, volume, area, and more.
Generate random numbers, roll dice, flip coins, and pick random items from a list. Supports ranges, multiple numbers, and no-duplicate mode.
Generate strong, secure passwords with customizable length, character types, and strength meter. Includes entropy calculation and one-click copy.
Convert time between 45+ world time zones instantly. Select multiple target zones to compare times side by side for meetings, travel, and remote work.
Count words, characters, sentences, paragraphs, and lines. Estimates reading time, speaking time, readability score, and shows top keywords.
Convert colors between HEX, RGB, HSL, and CMYK formats instantly. Includes a live color preview, WCAG accessibility contrast checker, and one-click copy for each format.
Convert between Celsius, Fahrenheit, Kelvin, Rankine, and more. Includes common reference points and quick presets.
Convert between mph, km/h, m/s, knots, Mach, and the speed of light. Includes common speed reference points.
Calculate how much mulch you need for your garden or landscaping project. Get results in cubic yards, cubic feet, or number of bags.
Quickly calculate the exact duration between two dates in years, months, weeks, and days. Perfect for planning, project management, or tracking age.
Quickly convert times between different time zones. Plan international calls or meetings with ease, ensuring everyone is on the same page.
Calculate exactly how much paint you need to paint a room. Enter wall dimensions, subtract windows and doors, and add the ceiling to get gallons needed for 1 or 2 coats.
Calculate your recommended tithe and giving amounts based on your income, pay frequency, and tithe percentage. Supports gross or net income, hourly or salary, and optional offerings.
Calculate the volume of your swimming pool in gallons for rectangular, round, and oval shapes based on dimensions and average depth.
Calculate your charitable giving amounts by income, giving percentage, and frequency. Includes a tax deductibility estimate showing potential savings when you itemize deductions.
Apply the 50/30/20 budgeting rule to your income. See exactly how much to allocate to needs, wants, and savings -- with customizable percentages and an optional giving deduction.
Calculate how many cubic yards, cubic feet, and bags of concrete you need for slabs, footings, columns, and steps. Includes waste factor, bag size options, and ready-mix vs. bagged cost comparison.
Calculate the square footage of any room, floor, or area instantly. Supports rectangles, triangles, circles, and L-shaped rooms. Perfect for flooring, painting, tiling, and real estate.
Calculate total hours worked from clock-in and clock-out times. Supports breaks, overtime, and multiple shifts. Instantly converts time to decimal hours for payroll.