Free Calculators and Converters
An extensive collection of free, highly-rated online calculators and converters covering finance, construction, education, health, cooking and math for everyday use. Trusted by millions - over 8 million calculations performed every month.
Financial Calculators
A suite of financial calculators to assist with projections for savings, investments, loans, mortgages and small business calculations.
Use our popular compound interest calculator to determine the future value of your savings or investments over time.
Loan CalculatorCalculate repayments for personal loans, student loans or mortgages. You can also incorporate extra payments.
- Compound Interest (Daily)
- Compound Interest Formula
- Amortization Calculator
- APY Calculator
- CAGR Calculator
- Car Loan Calculator
- Cash Back Calculator
- Forex Compounding
- Future Value Calculator
- How Long to Save
- How Long Will Money Last
- Hourly to Salary Calculator
- Interest Rate Calculator
- Investment Calculator
- IRR Calculator
- Loan Payoff Calculator
- Margin Calculator
- Million to Billion Converter
- MMA Calculator
- Money Counter
- Overtime Calculator
- Pay Raise Calculator
- Price Per Square Foot
- Salary to Hourly Calculator
- Savings Calculators
- Savings Goal Calculators
- Simple Interest Calculator
- SIP Calculator
- Stock Average Calculator
- Time and a Half Calculator
Everyday Calculators
Common calculations for construction projects, math problems, date planning, and daily tasks. From square footage to percentages to age calculations.
Work out the square footage of an area for flooring, landscaping, carpets, or other construction projects.
Percentage CalculatorWork out percentage increases, decreases or differences for tax, gratuities, discounts, grades or more.
- Age Calculator
- Age Difference Calculator
- Asphalt Calculator
- Birthday Calculator
- CBM Calculator
- Chronological Age
- Cubic Feet Calculator
- Cubic Yards Calculator
- Date Calculator
- Days Between Dates
- Days From Today
- Days Until...
- Decimal to Fraction
- Density Calculator
- Electricity Cost Calculator
- Fractions Calculators
- Generation Calculator
- Gravel Calculator
- Hex to Decimal Converters
- How Much Flooring do I Need?
- LED Savings Calculator
- Miles Per kWh Calculator
- MPGe Calculator
- Mulch Calculator
- Percentage Change
- Roman Numerals
- Sig Figs Calculator
- Final Grade Calculator
- Uni Grade Calculator
Featured Conversions
A series of individual converters for popular weight, length, height, area and energy units.
Convert between these popular units of weight in the imperial and metric systems.
Centimeters to feet & inchesOur popular calculator for converting units of height, length or distance.
- Grams to Pounds
- Kilos to Pounds
- Stone to Pounds
- Centimeters to Inches
- Cubic Yards to Tons
- Feet to Inches
- Feet to Meters
- Gallons to Ounces
- Gallons to Pounds
- Hertz to Seconds
- Inch-pounds to ft-lb
- Inches to Centimeters
- Inches to Feet
- Liters to Gallons
- Liters to Ounces
- Liters to Tons
- Lumens to Watts
- Meters to Feet & Inches
- Micrograms to mg
- Milligrams to Grams
- Millimeters to Inches
- Newton-Meters to ft lb
- Ounces and Pounds
- Square Feet to Acres
- Square Feet to Cubic Feet
- Square Feet to Cubic Yards
- Square Meters to Square Feet
- Watts to Amps
Health
A small collection of health calculators, from BMI and BMR through to pregnancy and exercise.
Calculate how many miles you've walked and how many calories you've burned for your walk or run.
Pregnancy CalculatorUse our calculator to work out your possible due date and see the key milestones on your pregnancy journey.
Cooking Calculators
A suite of recipe calculators to help you with converting between metric and imperial units when baking or cooking.
Use this recipe converter to quickly convert between all common units involved in cooking.
Cups to GramsConvert easily between cups and grams using this handy conversion tool.
- Air Fryer Converter
- Baking Conversions
- Butter Converter
- Cups to mL
- Cups to Ounces
- Cups to Tablespoons
- Grams to Cups
- Grams to Ounces
- Grams to Tablespoons
- Grams to Teaspoons
- mL to Grams
- Ounces to Grams
- Ounces to mL
- Oven Temperatures
- Pints to Cups
- Pounds and Cups
- Quarts to Cups
- Tablespoons to Teaspoons
- Teaspoons to Grams
- Teaspoons to mL
Unit Conversions
A series of unit converters for area, energy, fuel consumption, length & distance, volume, weight and more.
Convert between acres, square centimeters, square feet, square miles and other units of area.
Height ConverterUse this converter to change imperial measurements of height into metric, and vice-versa.
Are the calculators on our site free to use?
Yes, all the online calculators on The Calculator Site are free for you to use at your convenience. Our website is funded by the advertising we feature on our pages.
We hope you find our calculators useful. Founded in 2010, The Calculator Site evolved from our converter tools established in 2004. You can learn more about The Calculator Site and the causes we support on our about page.