Browse all 200 free online calculators

Free compound interest calculator with monthly contributions, annual return, and total future value. Ideal for savings, investing, and long-term wealth planning in USD.

Free loan calculator for monthly payment, total repayment, and total interest. Useful for personal loans, auto loans, and other fixed-term borrowing in the US.

Free mortgage calculator for monthly payment, total loan amount, and estimated repayment cost. Designed for US home buyers comparing home price, down payment, rate, and loan term.

Free investment calculator for future value with recurring contributions. Estimate portfolio growth, total invested amount, and projected ending balance over time.

Free dividend yield calculator to estimate annual dividend yield from share price and annual dividend per share. Helpful for dividend stock and ETF research.

Free retirement calculator for long-term savings goals, projected nest egg, and retirement planning. Useful for 401(k), IRA, and general retirement investing scenarios.

Free savings calculator for projecting account growth with an initial deposit, monthly savings, and annual interest. Great for emergency funds and short- to medium-term goals.

Free interest rate calculator to estimate annual rate from principal, final amount, and time period. Useful for comparing savings, loans, and investment outcomes.

Free credit card payoff calculator to estimate months to payoff, total paid, and debt reduction timeline based on balance, APR, and monthly payment.

Free inflation calculator to estimate future cost, inflation impact, and purchasing power change over time. Helpful for budgeting, retirement planning, and long-term pricing.

Use this roi calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this stock average calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this net worth calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this debt payoff calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this amortization calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this budget calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this rent vs buy calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this apr calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this future value calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this present value calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Estimate monthly auto loan payments, total repayment, and interest for a car purchase.

Estimate monthly student loan payments and total repayment over time.

Estimate payments for a personal installment loan with a fixed rate and term.

Estimate payments for a fixed-rate business loan using amount, APR, and term.

Project how much your savings can grow with an initial balance and monthly deposits.

Estimate how your home down payment fund can grow over time.

Estimate the future value of an IRA with regular monthly contributions.

Estimate the future value of a college savings plan with monthly contributions.

Calculate an emergency fund target based on your monthly expenses and target months of coverage.

Calculate your debt-to-income ratio using monthly debt payments and gross monthly income.

Estimate net pay per paycheck using gross annual salary, pay periods, and an estimated tax rate.

Estimate take-home pay for a biweekly payroll schedule with a simple effective tax assumption.

Convert an hourly wage into estimated annual income using hours per week and weeks per year.

Convert annual salary into an estimated hourly wage based on weekly hours and weeks worked.

Calculate simple interest based on principal, annual rate, and time.

Estimate annual dividend income using shares owned and annual dividend per share.

Calculate a down payment amount from home price and down payment percentage.

Estimate the loan amount you may support from a target monthly car payment, interest rate, and term.

Estimate total payment savings from refinancing into a lower monthly payment.

Calculate your savings rate using monthly income and monthly savings.

Estimate inflation-adjusted return using nominal return and inflation rate.

Compare the simple total cash cost of leasing a car versus buying it with financing.

Estimate capital gains tax from a taxable gain and tax rate.

Estimate your new gross annual salary after a raise percentage.

Free BMI calculator using height and weight with US and metric-friendly inputs. Instantly estimate body mass index for general health screening.

Use this bmr calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this body fat calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Free calorie calculator to estimate daily calorie needs based on age, sex, height, weight, and activity level. Useful for maintenance, fat loss, or weight gain planning.

Use this ideal weight calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this water intake calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this tdee calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Free pregnancy due date calculator based on last menstrual period. Estimate expected due date and pregnancy timeline using a simple standard method.

Use this ovulation calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this heart rate calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this pace calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this protein intake calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this body surface area calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this waist to hip ratio calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this lean body mass calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Estimate daily water intake using body weight and a hydration multiplier.

Estimate daily protein intake using body weight and grams per pound.

Estimate body surface area using height and weight.

Calculate a target calorie intake using maintenance calories and a chosen deficit.

Estimate target heart rate using age, resting heart rate, and exercise intensity.

Estimate your one-rep max using lifted weight and repetitions performed.

Estimate running or walking pace per kilometer using time and distance.

Estimate running or walking pace per mile using time and distance.

Estimate calories burned while walking using minutes, body weight, and MET value.

Estimate calories burned while running using minutes, body weight, and MET value.

Estimate target body weight after cutting to a goal body fat percentage while maintaining lean mass.

Calculate BMI Prime by dividing BMI by the healthy upper-range threshold of 25.

Calculate waist-to-height ratio using waist and height in the same unit.

Estimate a lean bulk calorie target using maintenance calories and a surplus.

Split a daily protein goal across a chosen number of meals.

Free age calculator to find exact age in years, months, and days from a birth date. Useful for forms, school, benefits, milestones, and general date calculations.

Free date difference calculator to find the number of days, weeks, months, or years between two dates. Helpful for schedules, deadlines, contracts, and planning.

Free time duration calculator to measure elapsed time between two clock times. Useful for shifts, schedules, events, productivity tracking, and daily planning.

Use this work hours calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this days between dates calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this business days calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this countdown calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this week number calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this date calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this hours between times calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Convert hours to minutes and back again with a simple time unit converter.

Convert minutes to seconds and seconds to minutes instantly.

Convert days to hours and hours to days for scheduling and planning.

Convert weeks to days and days to weeks with a quick planner-friendly tool.

Convert months to approximate days using a standard 30.4375-day month.

Convert years to months and months to years for long-range planning.

Estimate paid time off accrual using hours worked and PTO hours earned per hour worked.

Calculate meeting length from a start time and end time in hours and minutes.

Estimate paid working time after subtracting break minutes from a shift length.

Estimate total hours in a pay period using weekly hours and number of weeks.

Estimate total study time from hours per day and study days.

Estimate total project hours from number of tasks and average minutes per task.

Estimate total commute time from one-way minutes, weekly trips, and number of weeks.

Calculate weekly overtime hours by comparing total hours worked to a standard 40-hour week.

Count the number of days remaining until a target deadline date.

Free percentage calculator for percentage of a number, percent increase, and percent decrease style math. Useful for school, finance, shopping, and everyday calculations.

Use this percent change calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this percentage of total calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this fraction calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this ratio calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this average calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this weighted average calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this probability calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this standard deviation calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this log calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this square root calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this exponent calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this factorial calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this lcm calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this gcd calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Calculate percentage increase from an old value to a new value.

Calculate percentage decrease from an old value to a new value.

Convert a ratio into a percentage using a numerator and denominator.

Convert a decimal number into a percentage.

Convert a percentage into decimal form.

Calculate the area of a circle from its radius.

Calculate the circumference of a circle from its radius.

Calculate the area of a rectangle from length and width.

Calculate the area of a triangle from base and height.

Calculate the hypotenuse using the Pythagorean theorem.

Calculate the slope between two coordinate points.

Calculate the distance between two coordinate points.

Raise a base to a chosen exponent power.

Calculate the cube root of a number.

Calculate density from mass and volume.

Use this length converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this weight converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this temperature converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this speed converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this area converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this volume converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this energy converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this pressure converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this power converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this data storage converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this angle converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this density converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this fuel economy converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this time unit converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this frequency converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this force converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this torque converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this flow rate converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this electric charge converter to get a fast estimate with inputs designed for US and global English-speaking users.

Use this magnetic field converter to get a fast estimate with inputs designed for US and global English-speaking users.

Convert common area units such as square feet, square meters, acres, and hectares.

Convert common volume units such as liters, milliliters, gallons, and cubic feet.

Convert pressure units such as psi, bar, kPa, and atm.

Convert power units such as watts, kilowatts, horsepower, and BTU per hour.

Convert file sizes between bytes, kilobytes, megabytes, gigabytes, and terabytes.

Convert frequency units such as hertz, kilohertz, megahertz, and gigahertz.

Convert force units such as newtons, pounds-force, and kilogram-force.

Convert torque units such as newton-meters, foot-pounds, and inch-pounds.

Convert energy units such as joules, calories, kilowatt-hours, and BTU.

Convert angle units such as degrees, radians, and gradians.

Convert density units such as kilograms per cubic meter, pounds per cubic foot, and grams per milliliter.

Convert time units such as seconds, minutes, hours, days, and weeks.

Convert cooking volume units such as teaspoons, tablespoons, cups, fluid ounces, and milliliters.

Convert fuel volume between gallons, liters, and cubic feet.

Convert electric charge units such as coulombs, ampere-hours, and milliampere-hours.

Free tip calculator to find tip amount, total bill, and per-person split. Useful for restaurants, bars, delivery, travel, and service-based spending.

Free discount calculator to find sale price, amount saved, and final cost after a percent-off discount. Great for shopping, coupons, and retail price comparisons.

Free GPA calculator for weighted grade point average based on course grade points and credit hours. Useful for high school, college, and semester planning.

Use this split bill calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this sales tax calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this commission calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this markup calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this markdown calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this fuel cost calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this rent split calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this break even calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this rule of 72 calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this unit price calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this sleep calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this dog age calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this cat age calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this overtime pay calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this hourly to salary calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this salary to hourly calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Use this travel budget calculator to get a fast estimate with inputs designed for US and global English-speaking users.

Estimate how many gallons of paint you need based on wall area and paint coverage.

Estimate flooring area needed using room length and room width.

Estimate cubic yards of concrete needed for a slab using length, width, and depth.

Estimate cubic yards of mulch needed for a landscape bed.

Estimate the number of tiles needed using room area, tile area, and a waste factor.

Estimate wallpaper rolls needed from room perimeter, wall height, and roll coverage.

Estimate the number of fence panels needed from total fence length and panel width.

Estimate pool volume using length, width, and average depth.

Estimate appliance electricity cost from wattage, usage, days, and electricity rate.

Estimate road trip fuel cost using distance, fuel economy, and gas price.

Estimate babysitting cost from hourly rate and total hours.

Estimate the hourly freelance rate needed to hit a target income from billable hours.

Estimate total meal prep cost from servings and cost per serving.

Estimate a simple party budget using guest count, cost per guest, and venue cost.

Estimate moving cost using labor hours, hourly moving rate, and truck rental cost.

Split a utility bill evenly across roommates or household members.