All Calculators

Finance (14 calculators)

Compound Interest Calculator

Calculate how your investments grow over time with compound interest. Add regular contributions, compare compounding frequencies, and visualize your wealth building journey.

Mortgage Calculator

Calculate your monthly mortgage payment, see the full amortization schedule, and understand how much house you can afford. Free, no signup required.

Retirement Calculator

Calculate how much you need to retire, your FIRE number, and whether you are on track. See projections for your retirement savings growth over time.

Debt Payoff Calculator

Calculate how fast you can pay off your debt with extra payments. See how much interest you will save and when you will be debt-free.

Savings Goal Calculator

Calculate how much you need to save each month to reach your financial goal. See how different timelines and interest rates affect your required savings.

Investment Return Calculator

Calculate your investment returns including ROI, CAGR, and total gains. Compare performance across different time periods and see annualized returns.

Loan Comparison Calculator

Compare up to 3 loan offers side-by-side. See which loan has the lowest total cost, monthly payment, and interest charges to make the best borrowing decision.

Net Worth Calculator

Calculate your net worth by adding up your assets and subtracting liabilities. See your complete financial picture and track progress over time.

Emergency Fund Calculator

Calculate how much you need in your emergency fund based on your monthly expenses, income stability, and personal situation. Get a personalized savings target.

College Savings (529) Calculator

Calculate how much to save for college using a 529 plan. Factor in tuition inflation, investment returns, and see if you're on track for education costs.

Paycheck Calculator

Calculate your take-home pay after taxes and deductions. Estimate federal, state, and FICA taxes to see your actual paycheck amount.

Credit Card Payoff Calculator

Calculate how long it will take to pay off your credit card and how much interest you'll pay. See how extra payments can save you money and time.

Hourly to Salary Calculator

Convert hourly wage to annual salary and vice versa. See how much you make yearly, monthly, and weekly based on your hourly rate and hours worked.

Inflation Calculator

Calculate how inflation affects your money over time. See what today's dollars will be worth in the future and what past amounts equal in today's value.

Math (6 calculators)

Percentage Calculator

Calculate percentages easily. Find what percent one number is of another, calculate percentage increase/decrease, and solve any percentage problem.

Discount Calculator

Calculate the sale price after a discount and see how much you save. Works with percentage off, dollar off, and multiple discounts.

GPA Calculator

Calculate your GPA (Grade Point Average) for a semester or cumulative. Enter your grades and credit hours to find your GPA on a 4.0 scale.

Unit Price Calculator

Calculate and compare unit prices to find the best deal. Compare products of different sizes and prices to see which offers better value per unit.

Sales Tax Calculator

Calculate sales tax for any purchase. Enter the price and tax rate to find the total cost including tax, or work backwards from the total to find the pre-tax price.

Grade Calculator

Calculate your current grade and what you need on the final exam. Enter assignment scores and weights to find your overall grade in any class.

Conversion (0 calculators)

Coming soon

Health & Fitness (7 calculators)

BMI Calculator

Calculate your Body Mass Index (BMI) using your height and weight. See where you fall on the BMI scale and understand what your number means.

Calorie Calculator

Calculate how many calories you need per day based on your age, weight, height, and activity level. Find your TDEE for weight loss, maintenance, or muscle gain.

Pregnancy Due Date Calculator

Calculate your pregnancy due date based on your last menstrual period or conception date. See how many weeks pregnant you are and important milestones.

Body Fat Calculator

Calculate your body fat percentage using the U.S. Navy method. Enter your measurements to get an accurate estimate of your body composition.

Sleep Calculator

Calculate the best time to sleep or wake up based on sleep cycles. Wake up feeling refreshed by timing your sleep to complete full 90-minute cycles.

Pace Calculator

Calculate running pace, finish time, or distance. Perfect for runners and joggers training for races. Find your pace per mile or per kilometer.

Water Intake Calculator

Calculate how much water you should drink daily based on your weight, activity level, and climate. Get personalized hydration recommendations.

Date & Time (2 calculators)

Age Calculator

Calculate your exact age in years, months, and days. Find out how old you are or will be on any date. Also shows total days lived and days until next birthday.

Date Calculator

Calculate the number of days between two dates or add/subtract days from a date. Find out how many days until an event or between important dates.

Home & DIY (7 calculators)

Rental Property ROI Calculator

Calculate the ROI, cash flow, and cap rate for rental property investments. Analyze potential real estate deals with detailed income and expense projections.

Home Affordability Calculator

Find out how much house you can afford based on your income, debts, and down payment. Get a realistic home buying budget with monthly payment estimates.

Rent vs Buy Calculator

Compare the financial impact of renting vs buying a home. See the break-even point and total costs over time to make an informed housing decision.

Square Footage Calculator

Calculate square footage for rooms, flooring, painting, and landscaping. Enter length and width to find total area in square feet or square meters.

Paint Calculator

Calculate how much paint you need for your room or project. Enter room dimensions and get accurate estimates for gallons needed, including doors and windows.

Electricity Cost Calculator

Calculate how much electricity an appliance uses and costs. Enter wattage and hours of use to find daily, monthly, and yearly energy costs.

Concrete Calculator

Calculate how much concrete you need for your project. Enter dimensions to find cubic yards or number of bags needed for slabs, footings, and posts.

Auto (3 calculators)

Auto Loan Calculator

Calculate your monthly car payment, total interest, and see a complete amortization schedule. Compare different loan terms to find the best auto financing option.

Fuel Cost Calculator

Calculate how much gas will cost for your trip. Enter distance, fuel efficiency, and gas price to estimate your fuel expenses for any journey.

MPG Calculator

Calculate your vehicle's fuel efficiency in miles per gallon. Track your gas mileage, compare fill-ups, and monitor your car's fuel economy over time.

Cooking (2 calculators)

Tip Calculator

Calculate the tip amount and split the bill between multiple people. Quickly figure out 15%, 18%, 20% tips or enter a custom percentage.

Recipe Scaler Calculator

Scale any recipe to serve more or fewer people. Enter the original serving size and ingredient amounts, then adjust to your desired number of servings.

Science (0 calculators)