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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.

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Financial Calculators

A suite of financial calculators to assist with projections for savings, investments, loans, mortgages and small business calculations.

Compound Interest

Use our compound interest calculator to determine the future value of your savings or investments over time.

Loan Calculator

Calculate repayments for personal loans, student loans or mortgages. You can also incorporate extra payments.

Featured Conversions

A series of individual converters for popular weight, length, height, area and energy units.

Kilos to stone & pounds

Convert between these popular units of weight in the imperial and metric systems.

Centimeters to feet & inches

Our popular calculator for converting units of height, length or distance.

Health

A small collection of health calculators, from BMI and BMR through to pregnancy and exercise.

Steps to Miles Calculator

Calculate how many miles you've walked and how many calories you've burned for your walk or run.

Pregnancy Calculator

Use our calculator to work out your possible due date and see the key milestones on your pregnancy journey.

Handy and Fun

A collection of handy calculators for DIY construction projects as well as math calculators and a selection of tools for calculating dates.

Square Footage Calculator

Work out the square footage of an area for flooring, landscaping, carpets, or other construction projects.

Percentage Calculator

Work out percentage increases, decreases or differences for tax, gratuities, discounts, grades or more.

Cooking Calculators

A suite of recipe calculators to help you with converting between metric and imperial units when baking or cooking.

Cooking Converter

Use this recipe converter to quickly convert between all common units involved in cooking.

Cups to Grams

Convert easily between cups and grams using this handy conversion tool.

Unit Conversions

A series of unit converters for area, energy, fuel consumption, length & distance, volume, weight and more.

Area Converter

Convert between acres, square centimeters, square feet, square miles and other units of area.

Height Converter

Use this converter to change imperial measurements of height into metric, and vice-versa.

Featured Articles

How to Calculate Square Footage - Step by Step

Whether you're shopping for carpet or planning a landscaping or home improvement project, square footage is a key metric to understand. So, let's go through the steps involved in calculating it. Further down, we'll also include a handy calculator to help you with your calculation...

How Much is a TRILLION?

A trillion is one million million (or one thousand billion) and has twelve zeroes: 1,000,000,000,000.If you owned a trillion dollars and spent $1,000,000 each day, it would take you just under 2,740 years to spend it all.It's all about the ...

Compound Interest Formula - Explained

An in-depth look at the compound interest formula as we break down how to calculate compound interest. The concept of compound interest is that interest is added back to the principal sum so that interest is earned on that added interest during the next compounding period.

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. You can learn more about The Calculator Site and the causes we support (tree planting) on our about page.