CalcSunny is a small collection of free calculators for the everyday math people search for most: grades, percentages, loans, dates and more. It also has free music tools for musicians and DJs: a BPM & key finder, an audio cutter and a loudness meter.
We keep things simple. Every calculator runs right in your browser, so the numbers you type never leave your device. Each page explains the formula it uses and walks through an example so you can see exactly how the answer was reached.
Accuracy
Every calculator is checked against hand-worked answers before it goes live. Results are estimates for information only and aren't financial, medical or academic advice. For big decisions, confirm with your lender, school or doctor.
Spotted a mistake?
We'd like to fix it. A contact address will be listed here soon.