Calculator: Online Calculators

There are a million things in our everyday lives that have use reaching for a calculator. Whether it's to work out how long to boil eggs for, to work out the ratio between two numbers or percentage rate for a work project or to check math homework. iCalculator contains over a thousand calculators from simple math calculators to complex tax and engineering calculators. iCalculator is designed to be a simple suite of online calculators that allows you to quickly access the calculator you need. You can find a calculator by using the search feature, or by using the site navigation to view specific calculators by category (Human Resource, Logistics, Math or Engineering for example). If you are just looking for a simple calculator, use the Basic Online Math Calculator

Calculators by Country

Calculators by Category

Finance Calculators

Get involved

iCalculator is a specialist site which provides free online calculators with supporting articles and guides, our aim being to provide you sufficient information to make an informed decision where appropriate.

The calculators provided on this website are free to use, we make no guarantee of their accuracy [ as legal folks like to crucify people these days ] though clearly aim for 100%. iCalculator supports a broad range of free to use online calculators so we need your support. We kindly ask that if you:

  1. Spot a mistake (a bug)
  2. Have a new feature request
  3. Would like us to build a new calculator

That you get in touch with us. You can provide feedback and raise feature requests through our contacting us through our website, maybe join us on Facebook. We don't mind how you get in touch, the main thing is that you do. Your time and support helps us keep the tools free.