About Calculator Galore

Calculator Galore is a collection of free online calculators for everyday questions: school grades, home projects, dates and times, savings and loans.

How we build our calculators

• Fast: every page is a small static file that loads quickly, even on a slow phone connection.
• Private: calculations run in your browser. The numbers you enter are never sent to us.
• Transparent: each calculator shows the formula it uses and a worked example you can check by hand.
• Tested: we check results against hand calculations and known reference values before publishing.

A note on accuracy

We work hard to get every result right, but calculators can't know your exact situation. Finance results don't include taxes, fees or lender-specific rules. Construction estimates depend on site conditions. For decisions that matter, confirm the numbers with a qualified professional.