About Prontiko
Little tasks should take seconds, not your whole afternoon.
Useful tools, without the extra steps
Prontiko is an independently run collection of free tools for everyday calculations and image tasks. You can estimate paint for a room, check a discount, calculate work hours, compare profit margins, find a break-even point, or resize and compress an image.
Every tool is ready to use without an account. Each calculator includes instructions, a worked example and answers to common questions, so you can understand the result as well as get it.
Your inputs stay in your browser
Calculations run on your device. The image tools use your browser to read, resize, compress and convert the file you select; Prontiko does not upload that image to a server. Read our privacy policy for details about website traffic measurement and email.
Understand the limits
Results depend on the numbers and assumptions you enter. Paint quantities and work-hour earnings are estimates; business calculators do not account for every tax, fee or accounting rule. Check important results against your actual circumstances before making a decision.
Help us make the tools better
Found a confusing result or have a small task you would like us to cover? Send feedback or suggest a tool.