Free Online Calculators
90+ free calculators — instant results, no signup required.
automotive Calculators
construction Calculators
cooking Calculators
education Calculators
finance Calculators
Mortgage Calculator
Calculate monthly mortgage payments
Compound Interest Calculator
Calculate compound interest growth
Tip Calculator
Calculate tip amount and total bill
Discount Calculator
Calculate price after discount
ROI Calculator
Calculate return on investment
Retirement Savings Calculator
Calculate retirement savings needed
Rule of 72 Calculator
Years to double your investment
Income Tax Estimator
Estimate your income tax
Hourly to Salary Calculator
Convert hourly wage to annual salary
Overtime Pay Calculator
Calculate overtime earnings
Debt Snowball Calculator
Calculate debt payoff timeline
Emergency Fund Calculator
Calculate emergency fund target
Savings Goal Calculator
Time to reach your savings goal
Freelance Rate Calculator
Calculate your freelance hourly rate
Tip Pool Calculator
Split tips among staff
Etsy Fee Calculator
Calculate Etsy seller fees
Currency Converter
Convert between currencies using live rates (placeholder rate)
Salary Calculator
Compare hourly, weekly, monthly, and annual salaries
VAT Calculator
Add or remove VAT from a price
Sales Tax Calculator
Calculate total price including sales tax
CAGR Calculator
Calculate Compound Annual Growth Rate
Loan Comparison Calculator
Compare two loan offers side by side
fitness Calculators
Running Pace Calculator
Calculate running pace per km
One Rep Max Calculator
Calculate your one rep max
Push-Up Test Calculator
Assess upper body endurance based on push-ups
Sit-Up Test Calculator
Assess core endurance based on sit-ups in 1 minute
Cooper Test Calculator
Estimate VO2 max from Cooper 12-minute run test
VO2 Max Calculator
Estimate VO2 max from resting heart rate
fun Calculators
health Calculators
BMI Calculator
Calculate your Body Mass Index
Pregnancy Due Date Calculator
Calculate estimated due date
Daily Calorie Calculator
Estimate daily calorie needs
Water Intake Calculator
Calculate daily water needs
Body Fat Calculator
Estimate body fat percentage
BAC Calculator
Estimate Blood Alcohol Content
Ovulation Calculator
Estimate ovulation and fertile window
Macro Calculator
Calculate daily macros in grams from calories
Sleep Cycle Calculator
Find optimal bedtimes for your wake-up time
Caffeine Calculator
Track caffeine in your system
Max Heart Rate Calculator
Calculate your maximum heart rate and target heart rate zones
TDEE Calculator
Calculate Total Daily Energy Expenditure
Lean Body Mass Calculator
Estimate your lean body mass using the Boer formula
Thyroid Ratio Calculator
Calculate TSH ratio and related thyroid metrics
home Calculators
Paint Calculator
Calculate paint needed for a room
Carpet Area Calculator
Calculate carpet needed
Electricity Cost Calculator
Calculate appliance electricity costs
Square Footage Calculator
Calculate area in square feet
Pool Volume Calculator
Calculate swimming pool water volume
Wall Tile Calculator
Calculate tiles needed for a wall
Backsplash Calculator
Calculate tiles needed for a kitchen backsplash
Wallpaper Calculator
Calculate rolls of wallpaper needed for a room
Fence Calculator
Calculate materials needed for a fence
Deck Material Calculator
Estimate materials needed for a deck
lifestyle Calculators
Wedding Budget Calculator
Estimate wedding costs
Age Calculator
Calculate your exact age in years, months, days
Wedding Guest Count Calculator
Estimate final guest count from invitations sent
Moving Cost Calculator
Estimate the cost of your move
Vacation Budget Calculator
Plan and estimate your vacation costs
Rent vs Buy Calculator
Compare the cost of renting vs buying a home
Garage Sale Pricing Calculator
Estimate suggested prices for garage sale items
math Calculators
Percent Change Calculator
Calculate percentage change between values
Circle Area Calculator
Calculate circle area and circumference
Triangle Area Calculator
Calculate area of a triangle
Slope Calculator
Calculate the slope between two points
Average Calculator
Calculate the mean, median, mode, range of a list of numbers
Percentage Calculator
Calculate percentages: X% of Y, X is what % of Y, or % change
Random Number Generator
Generate random numbers in any range
Prime Factorization Calculator
Break a number into its prime factors
Fibonacci Generator
Generate Fibonacci sequence up to N terms
Logarithm Calculator
Calculate logarithms in any base
Trigonometry Calculator
Calculate sine, cosine, and tangent of an angle
pet Calculators
Dog Age Calculator
Convert dog years to human years
Cat Age Calculator
Convert cat years to human years
Pet Food Calculator
Calculate daily food portions for your pet
Pet Calorie Counter
Track daily calories for your pet from treats and meals
Pet Water Intake Calculator
Calculate daily water needs for your pet