Free Online Calculators
104+ accurate, fast, and private calculators for finance, health, math, science, and everyday life.
Age Calculator
Calculate your exact age in years, months, weeks, and days from your birthday. Free age calculator for any past or future date.
Cooking Measurement Converter
Convert cooking measurements between cups, tablespoons, teaspoons, and milliliters. Free kitchen conversion calculator for recipes.
Date Difference Calculator
Find the number of days, weeks, and months between two dates. Free date duration calculator for planning projects, events, and deadlines.
Time Calculator
Add or subtract durations in hours and minutes, and convert between hours, minutes, and seconds. Free time calculator for timesheets and schedules.
Tip Calculator
Quickly calculate the tip and total bill, then split it among any number of people. Free tip calculator for restaurants, delivery, and groups.
Restaurant Tip Calculator
Calculate the right tip for restaurant service and split the bill. Free restaurant tip calculator.
Delivery Tip Calculator
Figure out how much to tip for food or package delivery. Free delivery tip calculator.
Bar Tip Calculator
Calculate tips for bar tabs and drinks. Free bar tip calculator.
Hotel Tip Calculator
Know how much to tip hotel staff. Free hotel tip calculator for housekeeping and bellhop.
Salon Tip Calculator
Calculate the right tip for salon and spa services. Free salon tip calculator.
Amortization Calculator
Generate a complete amortization breakdown for any loan. See principal vs interest split and total cost over the life of the loan.
Auto Loan Calculator
Estimate your monthly car payment and total loan cost. Free auto loan calculator that accounts for down payment, trade-in, and sales tax.
Currency Converter
Convert amounts between two currencies using a custom exchange rate. Free currency converter for travel, shopping, and international business.
Fuel Cost Calculator
Calculate how much you will spend on gas for any trip or commute. Free fuel cost calculator using distance, MPG, and fuel price.
Investment Calculator
Estimate how your investments grow with compound interest and regular contributions. Free investment calculator for retirement, stocks, and long-term planning.
Loan Calculator
Calculate monthly payments, total interest, and payoff schedule for any personal loan. Free loan calculator with amortization and total cost breakdown.
Mortgage Calculator
Calculate your monthly mortgage payment including taxes, insurance, and PMI. Free mortgage calculator with amortization schedule and affordability analysis.
Paycheck Calculator
Estimate your net paycheck after taxes and deductions. Free paycheck calculator for hourly and salaried employees with withholdings.
Retirement Calculator
See if you are on track for retirement. Estimate your nest egg from current savings, contributions, and returns with this free retirement calculator.
Salary Calculator
Convert between hourly wage, annual salary, and monthly income. Free salary calculator that accounts for hours per week and vacation time.
Simple Interest Calculator
Compute simple interest using I = Prt. Free simple interest calculator for short-term loans, bonds, and basic finance problems.
Income Tax Calculator
Quickly estimate your income tax based on gross income and a flat effective rate. Free tax calculator for budgeting and paycheck planning.
New Car Loan Calculator
Estimate monthly payments on a new car loan. Free new car loan calculator.
Used Car Loan Calculator
Estimate monthly payments on a used car loan. Free used car loan calculator.
Lease vs Buy Calculator
Compare the cost of leasing versus buying a car. Free lease vs buy calculator.
Motorcycle Loan Calculator
Estimate monthly payments on a motorcycle loan. Free motorcycle loan calculator.
Gas Cost Calculator
Calculate the cost of gas for any trip. Free gas cost calculator.
MPG Calculator
Calculate your vehicle miles per gallon. Free MPG calculator.
EV Charging Cost Calculator
Estimate EV charging cost per trip. Free electric vehicle charging calculator.
Commute Cost Calculator
Calculate the cost of your daily commute. Free commute cost calculator.
Compound Interest Calculator
See how compound interest grows your savings over time. Free compound interest calculator.
401(k) Calculator
Project your 401(k) balance with employer match. Free 401k retirement calculator.
Roth IRA Calculator
Project Roth IRA growth with after-tax contributions. Free Roth IRA calculator.
Stock Return Calculator
Calculate total return on a stock investment. Free stock return calculator.
Dividend Reinvestment Calculator
See how reinvested dividends accelerate portfolio growth. Free DRIP calculator.
Student Loan Calculator
Estimate your monthly student loan payment and total interest. Free student loan calculator for federal and private loans.
Debt Consolidation Calculator
See how much you could save by consolidating multiple debts. Free debt consolidation calculator.
Business Loan Calculator
Calculate monthly payments on a business loan. Free business loan calculator for small and mid-size companies.
Personal Loan Calculator
Estimate monthly payments on a personal loan. Free personal loan calculator with total interest breakdown.
Car Loan Calculator
Calculate your monthly car payment and total loan cost. Free car loan calculator for new and used vehicles.
FHA Loan Calculator
Calculate FHA loan monthly payments with a low 3.5% down payment. Free FHA mortgage calculator with MIP estimates.
VA Loan Calculator
Estimate your VA loan monthly payment with zero down payment and no PMI. Free VA loan calculator for veterans.
Refinance Calculator
See if refinancing your mortgage makes sense. Free refinance calculator comparing your current and new monthly payments.
Home Affordability Calculator
Find out how much house you can afford based on your income and down payment. Free affordability calculator.
Jumbo Loan Calculator
Calculate monthly payments on a jumbo loan for high-value homes. Free jumbo mortgage calculator.
Interest-Only Mortgage Calculator
Calculate the monthly payment on an interest-only mortgage. Free IO mortgage calculator with future payment shock warning.
Hourly Paycheck Calculator
Estimate take-home pay from an hourly wage. Free hourly paycheck calculator.
Salary Paycheck Calculator
Estimate take-home pay from a salary. Free salary paycheck calculator.
Tax Refund Calculator
Estimate whether you will get a tax refund or owe. Free tax refund calculator.
Hourly to Salary Calculator
Convert an hourly wage to annual, monthly, and weekly salary. Free hourly to salary converter.
Overtime Calculator
Calculate overtime pay at time-and-a-half. Free overtime calculator for hourly workers.
Monthly Salary Calculator
Convert an annual salary into monthly take-home figures. Free monthly salary calculator.
Freelance Rate Calculator
Compute an effective hourly rate from freelance income. Free freelance rate calculator.
Income Tax Calculator
Estimate your federal income tax with deductions. Free income tax calculator.
VAT / GST Calculator
Add or remove VAT/GST from a price. Free VAT and GST calculator.
Property Tax Calculator
Estimate annual property tax based on assessed value. Free property tax calculator.
BMI Calculator
Calculate your Body Mass Index (BMI) instantly with metric or imperial units. Free BMI calculator with healthy weight range and category guidance.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy circumference method. Free body fat calculator for men and women with fitness category guidance.
Calorie Calculator
Estimate your daily calorie needs using the Mifflin-St Jeor equation. Free calorie calculator for BMR, TDEE, and weight-loss or gain goals.
Due Date Calculator
Estimate your baby's due date and current pregnancy week using the first day of your last menstrual period. Free due date calculator.
Sleep Calculator
Find your ideal bedtime or wake-up time based on 90-minute sleep cycles. Free sleep calculator so you wake up refreshed, not groggy.
BMI Calculator for Women
Calculate BMI tailored for women with healthy weight ranges. Free female BMI calculator.
BMI Calculator for Men
Calculate BMI tailored for men with healthy weight ranges. Free male BMI calculator.
BMI Calculator for Children
Estimate BMI for children and teens. Free pediatric BMI calculator (note: clinical percentile requires growth charts).
BMI Calculator for Seniors
Calculate BMI for older adults. Free senior BMI calculator with adjusted healthy ranges for ages 65+.
Weight Loss Calculator
See how much weight you need to lose to reach a healthy BMI. Free weight loss calculator with goal weight.
Ideal Weight Calculator
Find your ideal weight range based on a healthy BMI. Free ideal body weight calculator.
Body Fat Calculator for Men
Estimate male body fat percentage using the Navy method. Free body fat calculator for men.
Body Fat Calculator for Women
Estimate female body fat percentage using the Navy method. Free body fat calculator for women.
Lean Body Mass Calculator
Calculate your lean body mass from weight and body fat. Free LBM calculator.
Waist-to-Height Ratio Calculator
Calculate waist-to-height ratio, a strong health indicator. Free WHtR calculator.
Weight Loss Calorie Calculator
Find the daily calorie target for sustainable weight loss. Free weight loss calorie calculator.
Muscle Gain Calorie Calculator
Calculate the calorie surplus needed to build muscle. Free muscle gain calorie calculator.
TDEE Calculator
Calculate your Total Daily Energy Expenditure based on activity. Free TDEE calculator.
BMR Calculator
Find your Basal Metabolic Rate (calories at complete rest). Free BMR calculator.
Macro Calculator
Split your daily calories into protein, carbs, and fat. Free macro calculator for balanced nutrition.
Protein Calculator
Estimate your daily protein needs based on weight and activity. Free protein intake calculator.
Conception Date Calculator
Estimate the conception date from your last period. Free conception date calculator.
Pregnancy Week Calculator
Find out how many weeks pregnant you are. Free pregnancy week calculator.
Ovulation Calculator
Predict your ovulation and fertile window. Free ovulation calculator.
Best Bedtime Calculator
Find the best bedtime for your wake-up time. Free bedtime calculator by sleep cycle.
Wake-Up Time Calculator
Find the best wake-up time for your bedtime. Free wake-up time calculator.
Nap Calculator
Find the ideal nap length based on sleep cycles. Free nap calculator.
Discount Calculator
Find the final price after any discount or coupon. Free discount calculator that shows sale price, amount saved, and tax-inclusive total.
GPA Calculator
Calculate your semester or cumulative GPA on a 4.0 scale. Free GPA calculator that weights courses by credit hours.
Percentage Calculator
Calculate a percentage of a number, or find what percent one number is of another. Free percentage calculator for discounts, tips, and stats.
Coupon Calculator
Calculate the final price after a coupon discount. Free coupon calculator.
Sale Price Calculator
Find the sale price after any percent-off discount. Free sale price calculator.
Tip After Discount Calculator
Calculate the tip on the discounted price. Free tip-after-discount calculator.
Black Friday Calculator
See real savings on Black Friday deals. Free Black Friday discount calculator.
High School GPA Calculator
Calculate your high school GPA on a 4.0 scale. Free high school GPA calculator.
College GPA Calculator
Calculate your college semester GPA. Free college GPA calculator.
Cumulative GPA Calculator
Calculate cumulative GPA across all semesters. Free cumulative GPA calculator.
Percentage Increase Calculator
Calculate the percentage increase between two values. Free percent increase calculator.
Percentage Decrease Calculator
Calculate the percentage decrease between two values. Free percent decrease calculator.
Tip Percentage Calculator
Find the tip percentage for any bill. Free tip percentage calculator.
Grade Percentage Calculator
Convert points earned to a percentage grade. Free grade percentage calculator.
Unit Converter
Convert between metric and imperial units for length, weight, and temperature. Free unit converter with a flexible factor-based engine.
Length Converter
Convert between metric and imperial length units. Free length unit converter.
Weight Converter
Convert between metric and imperial weight units. Free weight unit converter.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin. Free temperature converter.
Volume Converter
Convert between metric and imperial volume units. Free volume unit converter.
Speed Converter
Convert between common speed units. Free speed unit converter.
Area Converter
Convert between common area units. Free area unit converter.