Simple Interest
Interest and total from principal, rate, and time.
Simple Interest is a free, browser-based tool on Toolery. Interest and total from principal, rate, and time. Everything runs locally on your device, so it's fast and completely private — no uploads, no queues, and no sign-up to try it.
Simple Interest — FAQ
Is Simple Interest free to use?
Yes. Simple Interest is completely free on Toolery — no watermarks and no sign-up required to try it.
Is Simple Interest private — do my files stay on my device?
Yes. Simple Interest runs entirely in your browser. Your files and input are processed on your own device and never uploaded to a server, so nothing is stored, seen, or shared.
How do I use Simple Interest?
Interest and total from principal, rate, and time. Open the tool, add your file or input, and get the result instantly — it all happens on your device.
Is Simple Interest accurate, and is my input private?
Yes on both. Simple Interest computes results instantly in your browser using standard formulas, and nothing you enter is stored or sent anywhere.