Free Finance & Health Calculators
Free finance & health calculators. Calculate mortgages, loans, savings, calories, BMI and more - all free, instant and private. No sign-up, no downloads.
Finance Calculators
Loans, savings, interest and investment calculators
CD Calculator
Estimate how much your certificate of deposit will grow with compound interest.
Savings Goal Calculator
Find out how much you need to save each month to reach your savings goal.
Home Equity Loan Calculator
Calculate monthly payments for a home equity loan or HELOC and your available equity.
Compound Interest Calculator
See how your investment grows over time with compound interest and monthly contributions.
Loan Payment Calculator
Calculate your monthly loan payment and total interest for any loan.
Credit Card Payoff Calculator
See how long it takes to pay off your credit card balance and how much interest you will pay.
Rent vs Buy Calculator
Compare the total cost of renting versus buying a home over time.
Auto Loan Calculator
Estimate your monthly car loan payment, total interest and total cost.
Retirement Savings Calculator
Project how much your retirement savings will be worth and whether you are on track.
Mortgage Calculator
Estimate your monthly mortgage payment including principal, interest, taxes and PMI.
Simple Interest Calculator
Calculate the interest earned on a principal amount with simple interest.
Inflation Calculator
See how inflation changes the buying power of your money over time.
Paycheck Calculator
Estimate your take-home pay per paycheck after taxes and deductions.
Discount Calculator
Find the final price of an item after a discount and how much you save.
Sales Tax Calculator
Calculate the sales tax amount and total price including tax.
Tip Calculator
Calculate the tip, the total bill and how much each person pays.
Amortization Calculator
See a full amortization schedule of your loan payments - principal, interest and balance.
Home Affordability Calculator
Estimate how much house you can afford based on your income, debt and down payment.
Student Loan Calculator
Calculate your monthly student loan payment and total interest over the loan term.
Refinance Calculator
Compare your current mortgage with a refinanced loan to see if it saves you money.
Biweekly Payment Calculator
See how paying your mortgage every two weeks shortens your loan term and saves interest.
Roth IRA Calculator
Project the future value of your Roth IRA and compare tax-free growth over time.
Debt Payoff Calculator
See how long it takes to clear your debts and how much interest you can save with extra payments.
Investment Growth Calculator
Project how much your investment grows with contributions and compounding returns.
Health Calculators
Body metrics, calories and nutrition calculators
Water Intake Calculator
Find out how much water you should drink each day based on your weight and activity.
Protein Intake Calculator
Calculate how much protein you need per day for your weight and fitness goal.
TDEE Calculator
Calculate your total daily energy expenditure and maintenance calories.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
Macro Calculator
Calculate your daily protein, carb and fat targets for your fitness goal.
Age Calculator
Calculate your exact age in years, months and days from your date of birth.
BMR Calculator
Calculate your basal metabolic rate using the Mifflin-St Jeor equation.
Calorie Calculator
Estimate your daily calorie needs to maintain, lose or gain weight.
Calorie Deficit Calculator
Find your daily calorie target and expected weight loss pace for a deficit.
Steps to Miles Calculator
Convert your step count into miles or kilometers based on your stride length.
Heart Rate Zone Calculator
Find your training heart rate zones for your age and fitness level.
Waist to Hip Ratio Calculator
Calculate your waist-to-hip ratio and see what it says about your health.
Due Date Calculator
Estimate your baby due date and current pregnancy week from your last period.
Sleep Calculator
Find the best bedtime for your wake-up time based on 90-minute sleep cycles.
Ovulation Calculator
Estimate your next period, ovulation day and fertile window from your last period.
Everyday Calculators
Simple everyday calculations
Date Difference Calculator
Calculate the number of days, weeks and months between two dates.
BMI Calculator
Calculate your Body Mass Index and see which BMI category you fall into.
Percentage Calculator
Find a percentage of a number, or what percent one number is of another.
GPA Calculator
Calculate your semester or cumulative GPA from your grades and credit hours.
Random Number Generator
Generate a random number between any two values, instantly.
From the Blog
Guides that explain the math behind the calculators.
Rent vs Buy: The Math Nobody Walks You Through
A $2,023 mortgage payment is not the real cost of owning a $400,000 house. Here is the math on taxes, maintenance, timing, and when renting wins.
Heart Rate Zones Explained: Which One You Should Actually Train In
What the five heart rate zones actually do, why Zone 2 gets the hype, and the exact bpm ranges for a 38-year-old with a 62 resting heart rate.
How Much Water Should You Actually Drink a Day?
The 8×8 rule says 64 ounces. A weight-based formula says it depends on your size, workouts and weather. Here's how to find your real daily number.