Free Online Calculators

Calculator.net provides free online calculators for financial planning, health tracking, math problems, and everyday life decisions. Our tools are designed to help you make informed choices with accurate, easy-to-understand results.

Financial Calculators

View All →

Plan your finances with mortgage, loan, retirement, investment, and tax calculators

Mortgage Calculator
home loan, monthly payment, interest rate
Loan Calculator
personal loan, payment schedule, APR
Auto Loan Calculator
car financing, vehicle loan, down payment
Retirement Calculator
401k, pension, savings plan
Investment Calculator
ROI, portfolio, compound growth
Income Tax Calculator
federal tax, deductions, refund
401K Calculator
retirement savings, employer match, contribution
Compound Interest Calculator
savings growth, interest earnings
Amortization Calculator
loan schedule, principal, interest breakdown
Salary Calculator
annual income, hourly wage, take-home pay
Interest Calculator
simple interest, compound interest
Discount Calculator
sale price, percentage off, savings

Fitness and Health Calculators

View All →

Track your health metrics with BMI, calorie, body fat, and fitness calculators

BMI Calculator
body mass index, healthy weight, obesity
Calorie Calculator
daily intake, weight loss, nutrition
Body Fat Calculator
body composition, fat percentage, fitness
Ideal Weight Calculator
target weight, healthy BMI
Pregnancy Calculator
due date, conception date
Pace Calculator
running pace, marathon time

Math Calculators

View All →

Solve everyday math problems with percentage, fraction, and algebra calculators

Percentage Calculator
percent change, increase, decrease
Simple Math Calculator
basic operations, addition, multiplication
GPA Calculator
grade point average, academic performance
Fraction Calculator
add fractions, simplify fractions
Scientific Calculator
advanced math, trigonometry
Algebra Calculator
solve equations, variables

Date and Time Calculators

View All →

Calculate dates, times, ages, and durations with our time management tools

Age Calculator
date of birth, years old, age difference
Date Calculator
days between, date difference, calendar
Time Calculator
add time, subtract time, duration
Hours Calculator
work hours, time tracking
Time Zone Calculator
convert time zones, world clock
Day Counter
countdown, days until
Business Days Calculator
working days, weekdays
Week Number Calculator
ISO week, calendar week

Housing/Building Calculators

View All →

Plan construction and home improvement projects with material and cost calculators

Concrete Calculator
concrete volume, materials needed
BTU Calculator
heating, cooling, HVAC
Square Footage Calculator
room area, floor space
Roofing Calculator
shingles, roofing materials
Tile Calculator
floor tiles, wall tiles
Paint Calculator
paint needed, wall coverage
Mulch Calculator
landscaping, garden mulch
Fence Calculator
fencing materials, posts
Deck Calculator
decking boards, materials

Measurements & Conversions

View All →

Convert and calculate measurements for length, weight, temperature, speed, and more

Height Calculator
height conversion, feet to cm
Celsius Fahrenheit Calculator
temperature conversion, degrees
Miles Kilometers Calculator
distance conversion, metric
Weight Converter
pounds to kg, mass conversion
Speed Calculator
mph to kph, velocity
Volume Calculator
liters to gallons, capacity
Area Calculator
square feet, square meters
Density Calculator
mass per volume

Converters

View All →

Comprehensive unit converters for all types of measurements and conversions

Meters to Feet
length conversion, metric to imperial
Centimeters to Inches
cm to in, height conversion
Pounds to Kilograms
lbs to kg, weight conversion
Ounces to Grams
oz to g, cooking conversion
Liters to Gallons
volume conversion, fuel
MPH to KPH
speed conversion, velocity
Square Feet to Square Meters
area conversion
PSI to Bar
pressure conversion, tire pressure
Roman Numeral Converter
numbers to Roman numerals

Credit Cards

View All →

Compare credit card offers, calculate payoff time, and manage credit card debt

Credit Card Calculator
payoff time, minimum payment, APR
Compare Credit Cards by City
best cards, rewards, cashback
Credit Card Payoff Calculator
debt reduction, payment plan
Balance Transfer Calculator
transfer savings, fees

Loans

View All →

Calculate loan payments, compare rates, and plan your borrowing strategy

Car Loan Calculator
auto financing, monthly payment, trade-in
Student Loan Calculator
education debt, repayment plan, deferment
Loan Payoff Calculator
early payoff, extra payments, savings
Compare Loans by City
best rates, local lenders, loan offers
Mortgage Payoff Calculator
early payoff, refinance, equity
Personal Loan Calculator
unsecured loan, fixed rate

Insurance

View All →

Calculate insurance premiums and compare coverage options

Insurance Premium Calculator
coverage cost, deductible, policy
Compare Insurance by City
best rates, local providers, quotes
House Affordability Calculator
home budget, mortgage qualification
Life Insurance Calculator
coverage amount, beneficiaries

Other Useful Calculators

View All →

Additional everyday calculators for tips, gas mileage, sales tax, and more

Tip Calculator
gratuity, restaurant tip, split bill
Gas Mileage Calculator
MPG, fuel efficiency, cost per mile
Sales Tax Calculator
tax rate, total cost, state tax
Wedding Calculator
budget planning, guest cost, venue
Hourly Salary Calculator
wage conversion, annual income
Electricity Calculator
power usage, energy cost

About American Calculators

Free, accurate calculators for everyday American life decisions. Simple tools for financial planning, health tracking, math problems, and more. All calculators are designed to help you make informed decisions with clear, easy-to-understand results.