All Calculators

401K Calculator

Project your 401(k) balance at retirement with employer match and contributions.

Age Calculator

Calculate exact age in years, months, and days from any birthdate.

Amortization Calculator

See your full loan amortization schedule with principal and interest breakdown by month.

Annuity Calculator

Calculate annuity payments, present value, or future value of an annuity.

Annuity Payout Calculator

Calculate periodic payout amounts from an annuity based on balance and term.

Anorexic BMI Calculator

Identify underweight BMI ranges and understand healthy weight thresholds.

APR Calculator

Calculate the true annual percentage rate on loans and credit cards including fees.

Area Calculator

Calculate area of circles, rectangles, triangles, and more shapes.

Army Body Fat Calculator

Estimate body fat percentage using the U.S. Army circumference method.

Attendance Calculator

Track your class attendance percentage and see how many absences you can still afford.

Auto Lease Calculator

Estimate your monthly auto lease payment based on price, residual, and money factor.

Auto Loan Calculator

Estimate your monthly auto loan payment with trade-in value and sales tax.

Average Calculator

Calculate mean, median, mode, range, and standard deviation for any dataset.

Average Return Calculator

Calculate the average annual return of an investment over multiple periods.

BAC Calculator

Estimate your blood alcohol concentration based on drinks, weight, and time.

Basic Calculator

A simple calculator for addition, subtraction, multiplication, and division.

Big Number Calculator

Perform arithmetic with arbitrarily large numbers beyond normal precision.

Binary Calculator

Convert between binary, decimal, octal, and hexadecimal. Perform binary arithmetic and bitwise operations.

Birthday Calculator

Find out your exact age, days until your next birthday, zodiac sign, and fun birthday facts.

BMI Calculator

Calculate your Body Mass Index and interpret your weight category.

BMR Calculator

Calculate your Basal Metabolic Rate to understand energy at rest.

Boat Loan Calculator

Estimate your monthly boat loan payment and total financing cost.

Body Fat Calculator

Estimate your body fat percentage using measurements.

Body Surface Area Calculator

Calculate body surface area using height and weight with multiple formulas.

Body Type Calculator

Determine your body type — ectomorph, mesomorph, or endomorph.

Budget Calculator

Create a personal budget using the 50/30/20 rule and track your spending.

Business Loan Calculator

Estimate monthly payments and total cost for a small business loan.

Calorie Calculator

Find out how many calories you need daily to reach your goals.

Calorie Deficit Calculator

Calculate your personalized calorie deficit target to lose weight safely.

Calories Burned Calculator

Estimate calories burned during exercise and daily activities.

Canadian Mortgage Calculator

Calculate Canadian mortgage payments with semi-annual compounding.

Car Payment Calculator

Calculate your monthly car payment and total loan cost based on price, rate, and term.

Carbohydrate Calculator

Calculate your daily carbohydrate needs based on goals and activity level.

Cash Back or Low Interest Calculator

Compare a cash-back rebate versus a low-interest financing offer on a purchase.

Cash Out Refinance Calculator

Calculate how much cash you can take out when refinancing your home.

CD Calculator

Calculate the maturity value and interest earned on a certificate of deposit.

Circle Calculator

Calculate area, circumference, radius, and diameter of a circle.

College GPA Calculator

Track and calculate cumulative college GPA across multiple semesters.

Common Factor Calculator

Find all common factors shared between two or more numbers.

Compound Interest Calculator

See how your investments grow with the power of compound interest.

Conception Calculator

Find your most fertile days and optimal conception window.

Confidence Interval Calculator

Calculate confidence intervals for population means and proportions.

Credit Card Calculator

See how long it takes to pay off credit card debt and total interest paid.

Credit Cards Payoff Calculator

Plan how to pay off multiple credit cards with optimal payment allocation.

Currency Converter

Convert between 30 world currencies using approximate mid-market exchange rates.

Date Calculator

Add or subtract days from a date and find the difference between dates.

Date to Date Calculator

Calculate the exact number of days, weeks, months, and years between two dates.

Days Between Dates

Calculate the exact number of days between any two dates with hours, minutes, and a visual chart.

Debt Consolidation Calculator

Compare consolidating multiple debts into a single lower-rate loan.

Debt Payoff Calculator

Create a debt payoff plan using snowball or avalanche strategies.

Debt-to-Income Ratio Calculator

Calculate your debt-to-income ratio to see if you qualify for a mortgage.

Depreciation Calculator

Calculate asset depreciation using straight-line, declining balance, or MACRS methods.

Discount Calculator

Calculate the final price after any discount percentage and optional tax.

Distance Calculator

Calculate the distance between two points in 2D or 3D space.

Down Payment Calculator

Calculate how much you need to save for a home down payment.

Estate Tax Calculator

Estimate federal estate tax liability based on estate value and exemptions.

Exponent Calculator

Calculate powers and exponents for any base and exponent value.

Factor Calculator

Find all factors and factor pairs of any positive integer.

Fat Intake Calculator

Calculate your recommended daily fat intake based on caloric needs.

Federal Tax Calculator

Estimate your federal income tax based on income, filing status, and deductions.

FHA Loan Calculator

Estimate monthly payments for an FHA loan including mortgage insurance.

Final Exam Calculator

Calculate the minimum score you need on your final exam to achieve your desired course grade.

Final Grade Calculator

Find out what score you need on your final exam to get your target grade.

Fraction Calculator

Add, subtract, multiply, and divide fractions instantly.

Future Value Calculator

Calculate the future value of an investment with regular contributions.

GCF Calculator

Find the greatest common factor of two or more numbers with prime factorization.

GDP Calculator

Calculate GDP using expenditure, income, or production approaches.

GFR Calculator

Estimate glomerular filtration rate to assess kidney function.

GPA Calculator

Calculate your GPA on a 4.0 scale from course grades and credits.

Grade Calculator

Calculate your weighted course grade from assignment scores.

Graphing Calculator

Plot and analyze mathematical functions on an interactive graph.

Half-Life Calculator

Calculate the remaining quantity after radioactive or exponential decay.

Healthy Weight Calculator

Find your healthy weight range based on height, age, and body frame.

Heart Rate Calculator

Calculate target heart rate zones for exercise and fat burning.

Height Calculator

Predict a child's adult height based on parental heights and current age.

HELOC Calculator

Calculate payments on a home equity line of credit during draw and repayment periods.

Hex Calculator

Perform arithmetic and conversions with hexadecimal numbers.

High Yield Savings Calculator

See how much your money grows in a high-yield savings account over time.

Home Affordability Calculator

Find out how much house you can afford based on your income and debts.

Home Equity Loan Calculator

Find out how much equity you can borrow against your home and estimate monthly payments.

Horsepower Calculator

Calculate horsepower from torque and RPM or convert between power units.

Hourly to Salary Calculator

Convert your hourly wage to an equivalent annual salary.

Ideal Weight Calculator

Find your ideal body weight using multiple medical formulas.

Income Tax Calculator

Estimate your federal income tax based on filing status and deductions.

Inflation Calculator

Calculate the inflation-adjusted value of money over time using historical CPI data.

Interest Calculator

Calculate simple and compound interest on any principal amount over time.

Interest Rate Calculator

Find the interest rate needed to reach a future value from a present value.

Investment Calculator

Project future value of investments with regular contributions and compound interest.

IRA Calculator

Estimate your Traditional IRA balance at retirement with tax-deferred growth.

IRR Calculator

Calculate the internal rate of return for a series of cash flows.

LCM Calculator

Calculate the least common multiple for any set of numbers.

Lean Body Mass Calculator

Calculate your lean body mass using multiple estimation formulas.

Lease Calculator

Calculate lease payments for equipment, vehicles, or property.

Loan Calculator

Estimate monthly payments and total cost for any personal or auto loan.

Logarithm Calculator

Compute natural log, base-10 log, or any custom base logarithm.

Long Division Calculator

Solve long division problems step by step with quotient and remainder.

Macro Calculator

Calculate optimal daily protein, carb, and fat intake for your fitness goals.

Margin Calculator

Calculate profit margin, markup percentage, and selling price from cost.

Marriage Tax Calculator

Compare your tax liability filing jointly versus separately as a married couple.

Matrix Calculator

Add, subtract, multiply matrices and calculate determinants and inverses.

Mean Median Mode Range Calculator

Find the mean, median, mode, and range of any data set instantly.

Moon Phase Compatibility Calculator

Discover your cosmic connection by comparing moon phases between two dates.

Mortgage Calculator

Calculate your monthly mortgage payment, total interest, and amortization schedule.

Mortgage Calculator UK

Calculate UK mortgage repayments in pounds with stamp duty estimates.

Mortgage Payoff Calculator

See how extra payments can help you pay off your mortgage faster.

Mutual Fund Calculator

Project mutual fund growth with systematic investments and expense ratios.

Number Sequence Calculator

Find the next terms and formula for arithmetic and geometric sequences.

Ohms Law Calculator

Calculate voltage, current, resistance, or power using Ohm's law.

One Rep Max Calculator

Estimate your maximum lift weight from submaximal training sets.

Overtime Calculator

Calculate overtime pay based on hours worked and pay rate with FLSA rules.

Overweight Calculator

Check if you are overweight and calculate how much weight to lose.

Ovulation Calculator

Predict your ovulation and fertile window.

P-Value Calculator

Calculate the p-value from a test statistic for z, t, chi-square, or F tests.

Pace Calculator

Calculate running pace, speed, or finish time for any distance.

Payback Period Calculator

Determine how long it takes to recoup an investment from its cash flows.

Paycheck Calculator

Estimate your take-home pay after federal, state, and local taxes.

Payment Calculator

Calculate monthly payments for any loan based on amount, rate, and term.

Pension Calculator

Estimate your pension benefit based on years of service and salary history.

Percent Change Calculator

Calculate the percentage change between two values — increase or decrease.

Percent Error Calculator

Calculate the percent error between an experimental and theoretical value.

Percentage Calculator

Calculate percentages, percent change, and percent of a number.

Percentage Increase Calculator

Calculate the percentage increase from one value to another.

Period Calculator

Predict your next period and track your menstrual cycle patterns.

Permutation and Combination Calculator

Calculate permutations and combinations for any n and r values.

Personal Loan Calculator

Calculate monthly payments and total interest for any personal loan amount and rate.

Pregnancy Calculator

Track your pregnancy timeline with trimester milestones and key dates.

Pregnancy Conception Calculator

Estimate when conception occurred based on your due date or last period.

Pregnancy Due Date Calculator

Estimate your baby's due date from last period or conception.

Pregnancy Weight Gain Calculator

Calculate recommended weight gain during pregnancy based on pre-pregnancy BMI.

Present Value Calculator

Calculate the present value of a future sum or annuity at a given discount rate.

Prime Factorization Calculator

Break down any number into its prime factors with step-by-step division.

Probability Calculator

Calculate single event, multiple event, and conditional probability.

Protein Calculator

Find out how much protein you need daily based on your goals.

Pythagorean Theorem Calculator

Solve for any side of a right triangle using the Pythagorean theorem.

Quadratic Formula Calculator

Solve quadratic equations using the quadratic formula.

Random Number Generator

Generate random numbers within any range instantly.

Ratio Calculator

Simplify ratios, solve proportions, and scale ratios step by step.

Real Estate Calculator

Analyze real estate investment returns including rental income and appreciation.

Refinance Calculator

Compare your current mortgage to a refinanced loan and see monthly savings.

Rent Calculator

Determine how much rent you can afford based on your income and expenses.

Rent vs. Buy Calculator

Compare the long-term financial impact of renting versus buying a home.

Rental Property Calculator

Calculate rental property cash flow, cap rate, and return on investment.

Repayment Calculator

Calculate loan repayment schedules with principal and interest breakdowns.

Resistor Calculator

Decode resistor color bands and calculate series/parallel resistance.

Retirement Calculator

Estimate how much you need to retire comfortably.

Right Triangle Calculator

Solve right triangles — find missing sides and angles with step-by-step solutions.

RMD Calculator

Calculate required minimum distributions from your retirement accounts.

ROI Calculator

Measure the return on investment for any project or asset over time.

Roman Numeral Converter

Convert between Roman numerals and Arabic numbers with symbol breakdown.

Roth IRA Calculator

Project your Roth IRA balance at retirement with tax-free growth estimates.

Rounding Calculator

Round numbers to any decimal place, significant figure, or fraction.

Salary Calculator

Convert between hourly, weekly, monthly, and annual salary figures.

Salary to Hourly Calculator

Convert your annual salary to an equivalent hourly wage.

Sales Tax Calculator

Quickly compute sales tax for any purchase amount and rate.

Sample Size Calculator

Determine the sample size needed for a statistically significant survey.

Savings Calculator

Plan your savings goals with deposit and interest projections over time.

Scientific Calculator

Full-featured scientific calculator for complex calculations.

Scientific Notation Calculator

Convert numbers to and from scientific notation and perform arithmetic.

Self-Employment Tax Calculator

Calculate SE tax and estimated quarterly payments for freelancers and contractors.

Simple Interest Calculator

Calculate simple interest earned or owed on a principal amount.

Sleep Calculator

Find the best times to sleep or wake up based on 90-minute sleep cycles.

Slope Calculator

Find the slope, distance, and equation of a line between two points.

Social Security Calculator

Estimate your Social Security benefits based on earnings and claiming age.

Square Root Calculator

Find the square root or nth root of any number.

Standard Deviation Calculator

Compute standard deviation and variance for statistical data.

Statistics Calculator

Compute key statistics including mean, variance, skewness, and quartiles.

Student Loan Calculator

Calculate student loan payments and total repayment cost for any plan.

Study Time Calculator

Plan your study sessions with Pomodoro scheduling and a visual daily timeline.

Surface Area Calculator

Calculate the surface area of 3D shapes including spheres, cubes, and cylinders.

Take-Home Pay Calculator

See your net pay after all deductions and withholdings.

Tax Calculator

Estimate your federal and state income tax liability for the current tax year.

TDEE Calculator

Total Daily Energy Expenditure based on activity level.

Test Grade Calculator

Convert your raw test score to a percentage and letter grade instantly with a visual gauge.

Time Calculator

Add, subtract, and convert hours, minutes, and seconds.

Time Card Calculator

Track work hours and calculate total pay for any pay period.

Time Clock Calculator

Calculate hours worked and daily pay from clock-in and clock-out times.

Time Duration Calculator

Calculate the duration between a start time and end time.

Time Zone Converter

Convert times between any world time zones and view a live world clock for 8 major cities.

Utility

Tip Calculator

Calculate tip amount and split the bill among any number of people.

Triangle Calculator

Solve triangles — find missing sides, angles, area, and perimeter.

Unit Converter

Convert between metric and imperial units for length, weight, temperature, volume, speed, area, time, and data.

VA Mortgage Calculator

Calculate VA loan payments with no down payment and no PMI.

VAT Calculator

Add or remove VAT from any price at any tax rate.

Voltage Drop Calculator

Calculate voltage drop across a wire based on length, gauge, and current.

Volume Calculator

Find volume and surface area of 3D shapes including spheres, cylinders, and cubes.

Water Intake Calculator

Calculate your recommended daily water intake based on weight and activity.

Weight Watcher Points Calculator

Estimate daily points allowance and food point values for weight management.

Weighted Grade Calculator

Calculate your weighted course grade with a pie chart showing weight distribution.

Work Hours Calculator

Calculate total work hours and earnings across shifts and days.