Percentage Calculator - Online Percent / Change
Free percentage calculator. Compute "A is what % of B", "B's A%", and increase/decrease locally. 100% local.
About 计算器
Compute percentages, ratios and changes locally. This tool runs entirely in your browser locally — no file upload, your privacy is protected, and speed is unaffected by network.
FAQ
Will my files be uploaded?
No. All processing happens locally in your browser; files never leave your device.
Which formats / scenarios are supported?
percentage calculator, percentage, online percentage, percent change, growth rate and more can be done on this page.
Do I need an internet connection?
After the page loads, conversion/computation runs locally and works offline (except features relying on external fonts/libraries).