203 free calculators across 4 categories.
Calculate monthly mortgage payments, total interest, and amortization schedule.
Estimate monthly loan payments and total cost for any loan amount and rate.
Find your monthly car payment and total cost including interest.
Calculate simple or compound interest on savings and investments.
Determine monthly payments for any loan based on amount, rate, and term.
Project your retirement savings and estimate how long your money will last.
Generate a full amortization schedule showing principal and interest breakdown.
Project investment growth over time with regular contributions.
See how compound interest grows your money exponentially over time.
Estimate your federal income tax liability based on income and deductions.
Convert salary between hourly, weekly, monthly and annual figures.
Calculate how much your savings will grow with regular contributions.
Project your 401(k) retirement savings growth over your career.
Calculate the purchasing power of money over time adjusted for inflation.
Find the effective interest rate on any loan or investment.
Calculate sales tax and final price for any purchase in any state.
Find out how much house you can afford based on your income and debts.
Determine how much rent you can afford based on income and expenses.
Calculate minimum payments, payoff time, and total interest on credit cards.
Find out how long it will take to pay off your credit card debt.
Create a debt payoff plan and see your debt-free date.
Estimate monthly student loan payments and total repayment amount.
Calculate interest earned or owed using simple interest formula.
Calculate returns on certificates of deposit (CDs) with various terms.
Calculate return on investment as a percentage for any venture.
Calculate the annual percentage rate on any loan.
Calculate discounted price and savings amount for any sale.
Plan your monthly budget and track income vs expenses.
Calculate gross margin, markup, and profit percentage.
Find the final price after applying a percentage discount.
Calculate the present value of future cash flows.
Project the future value of investments or savings.
Determine if refinancing your mortgage makes financial sense.
Compare the financial impact of renting versus buying a home.
Calculate your net take-home pay after taxes and deductions.
Add or remove VAT from any price with instant results.
Convert between world currencies with up-to-date exchange rates.
Calculate commission earnings based on sales and commission rate.
Calculate your Body Mass Index and find out your healthy weight range.
Estimate your daily calorie needs based on activity level and goals.
Estimate your body fat percentage using measurements.
Find your basal metabolic rate โ calories burned at complete rest.
Find your ideal body weight based on height and frame size.
Calculate due date, conception date, and key pregnancy milestones.
Determine your expected due date from last menstrual period or conception.
Calculate running pace, speed, and finish time for any distance.
Estimate calories burned for hundreds of activities and exercises.
Find your daily protein intake needs based on weight and goals.
Calculate Total Daily Energy Expenditure based on activity level.
Calculate optimal macronutrient ratios for your diet goals.
Predict your fertile window and ovulation date.
Track your menstrual cycle and predict future periods.
Find your target heart rate zones for optimal exercise intensity.
Calculate your maximum strength for any lift from rep data.
Estimate blood alcohol content based on drinks, weight, and time.
Find the optimal time to go to sleep or wake up based on sleep cycles.
Determine a healthy weight range for your height and age.
Calculate your lean body mass from total weight and body fat.
Full-featured scientific calculator with trigonometry, logarithms and more.
Add, subtract, multiply and divide fractions with step-by-step results.
Calculate percentages, percentage change, and percentage of a number.
Solve triangles โ find sides, angles, area, and perimeter.
Calculate volume of sphere, cylinder, cone, cube, and more shapes.
Calculate mean, variance, and standard deviation for any data set.
Generate random numbers within any range with customizable options.
Calculate the percent error between experimental and theoretical values.
Calculate any base raised to any power, including negative exponents.
Perform arithmetic operations on binary numbers.
Solve quadratic equations and find roots using the quadratic formula.
Calculate slope, midpoint, and distance between two points.
Calculate logarithms in any base, including natural log.
Calculate area of circle, rectangle, triangle, trapezoid and more.
Determine the required sample size for statistical studies.
Calculate probability of events occurring in various scenarios.
Compute mean, median, mode, range, and more statistical measures.
Calculate z-scores and find probabilities from standard normal distribution.
Simplify ratios and find equivalent ratios for any values.
Find any side of a right triangle using the Pythagorean theorem.
Calculate square roots, cube roots, and nth roots of any number.
Perform matrix operations: addition, multiplication, inverse, and determinant.
Calculate mean, weighted average, and geometric average.
Find all factors and prime factors of any whole number.
Round numbers to any decimal place or significant figure.
Find the least common multiple of two or more numbers.
Find the greatest common factor of two or more numbers.
Calculate p-values for hypothesis testing in statistics.
Calculate confidence intervals for population parameters.
Convert numbers to and from scientific notation.
Calculate exact age in years, months, and days from any birthdate.
Add or subtract days from a date and find duration between dates.
Add, subtract, and convert time in hours, minutes, and seconds.
Calculate total work hours, overtime, and time differences.
Calculate cumulative GPA from all course grades and credit hours.
Calculate your final grade based on weighted assignments and exams.
Predict adult height for children based on parental heights.
Calculate bags of concrete needed for any slab, column, or footing.
Estimate total fuel cost for any trip based on distance and MPG.
Calculate square footage of any room or area shape.
Calculate tip amount and split the bill among any number of people.
Calculate MPG and fuel efficiency for your vehicle.
Calculate total work hours from daily clock-in and clock-out times.
Generate secure random passwords with custom length and character sets.
Convert between hundreds of units across all measurement categories.
Calculate BTU requirements for heating and cooling any room or space.
Calculate roofing materials needed for any roof size and pitch.
Estimate number of tiles and materials for any flooring or wall project.
Calculate cubic yards of mulch needed for any garden or landscape area.
Estimate tons of gravel or crushed stone for any project area.
Calculate electricity cost for any appliance based on usage and rates.
Calculate speed, distance, or time given the other two values.
Calculate density, mass, or volume using the density formula.
A fun compatibility score generator for couples and crushes.
Convert between Roman numerals and standard Arabic numbers.
Count days between two dates or days until a future event.