Browse our complete collection of free, accurate online calculators.
Financial calculators for loans, mortgages, investments, and more
Calculate your monthly mortgage payment, total interest, and amortization schedule. Perfect for homebuyers planning their purchase.
Calculate compound interest on investments and savings. See how your money grows over time with different compounding frequencies.
Calculate loan payments, total interest, and amortization schedule for personal loans, auto loans, and student loans.
Calculate your income tax, tax brackets, and effective tax rate. Estimate your tax liability for the current tax year.
Calculate your take-home pay, net salary, and tax deductions. Convert between hourly, monthly, and annual salary.
Calculate investment returns, future value, and growth potential. Plan your investment strategy with our comprehensive investment calculator.
Calculate your monthly car loan payment, total interest, and amortization schedule. Compare different loan terms and interest rates to find the best auto loan.
Calculate student loan payments, total interest, and repayment strategies. Compare different repayment plans and see how extra payments can save money.
Calculate how long it will take to pay off your credit card debt and how much interest you'll pay. See how extra payments can accelerate payoff and save money.
Calculate how much you need to save for retirement and see if you're on track. Plan your retirement savings strategy and estimate your retirement income needs.
Calculate how much your savings will grow over time with compound interest. Plan your savings goals and see how regular contributions can accelerate growth.
Create a comprehensive budget to track income and expenses. Plan your finances, identify savings opportunities, and achieve your financial goals.
Calculate tips quickly and accurately for restaurants, services, and more. Split bills, calculate different tip percentages, and never overpay or underpay again.
Calculate discounts, sale prices, and savings quickly. Find the final price after discounts, calculate percentage discounts, and compare prices to make smart shopping decisions.
See how inflation affects your money. Convert any dollar amount between years using U.S. BLS CPI-U data. Free inflation calculator and purchasing power calculator.
Calculate Return on Investment (ROI). Enter cost and gain or final value to get ROI percentage. Free ROI calculator for investments and business.
Calculate how long it takes to recover an investment. Enter initial cost and annual (or monthly) cash flow to get payback period in years and months. Free payback period calculator.
Calculate your debt-to-income ratio (DTI) for mortgage and loan eligibility. Check front-end and back-end DTI. Free DTI calculator.
See how fast you can pay off your loan with extra payments. Calculate payoff date and total interest saved. Free loan payoff calculator.
Health calculators for BMI, body fat, calories, and more
Calculate your Body Mass Index (BMI) using metric or imperial units. Get instant results and understand your BMI category.
Calculate your body fat percentage using the US Navy method. Get accurate body fat estimates based on your measurements and understand your body composition.
Calculate your daily calorie needs based on your age, gender, weight, height, and activity level. Understand your BMR, TDEE, and calorie requirements for weight loss or gain.
Calculate your due date, pregnancy week, and trimester based on your last menstrual period (LMP) or conception date. Track your pregnancy progress with our free pregnancy calculator.
Calculate your Basal Metabolic Rate (BMR)—the calories your body burns at rest. Uses the Mifflin-St Jeor equation. Free BMR calculator for diet and fitness planning.
Calculate your daily water need by weight, activity, and climate. Get a recommendation in cups and ml. Free water intake calculator.
Calculate your daily protein need by weight and goal: weight loss, maintenance, or muscle gain. Free protein calculator in grams.
Education calculators for GPA, grades, percentages, and more
Calculate your Grade Point Average (GPA) using the 4.0 scale or other grading systems. Perfect for students tracking their academic performance.
Convert between percentage and letter grades. Calculate test grades, final grades, and weighted averages. Free grade calculator for students and teachers.
Mathematical calculators for scientific calculations and more
Calculate percentages, percentage increase/decrease, and percentage of a number with our free percentage calculator.
Advanced scientific calculator with trigonometric functions, logarithms, exponentials, and more. Perfect for students and professionals.
Convert between different units of length, weight, temperature, volume, and area. Free online unit converter for everyday conversions and calculations.
Add, subtract, multiply, and divide fractions. Simplify fractions and convert between fractions and decimals. Free online fraction calculator with step-by-step results.
Date and time calculators for age, date differences, and more
Calculate your exact age in years, months, weeks, and days. Find out how many days you've been alive or calculate age differences.
Calculate the number of days, weeks, months, and years between two dates. Perfect for planning events, tracking deadlines, and measuring time periods.
Calculate total work hours, time card entries, and weekly hours. Perfect for tracking work time, calculating pay, and managing schedules.