Simple Interest Calculator (Free)
This free simple interest calculator runs entirely in your browser — no signup and no file uploads. Compute simple interest and total amount from principal, rate, and time without compounding.
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Inputs
Results
- Interest
- $150.00
- Total
- $1,150.00
How to use this free tool
- Enter principal.
- Enter annual rate.
- Enter time period.
- View interest and total.
Formula
I = P × r × t; A = P + I
Examples
Basic SI
Input: P=1000, r=5%, t=2y
Output: I=100; A=1100
Related searches
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FAQ
Simple vs compound?
Simple interest does not earn interest on prior interest.
Is time in years?
Use years (or convert months to fractional years).
When is simple interest used?
Some short-term loans and teaching examples.
How do I use a free simple interest calculator?
This free simple interest calculator runs entirely in your browser — no signup and no file uploads. Use the free tool above for instant results — no signup, browser-based, and private.
What is a simple interest calculator?
This free simple interest calculator runs entirely in your browser — no signup and no file uploads. Use the free tool above for instant results — no signup, browser-based, and private.
Is there a free online calculator for simple interest?
This free simple interest calculator runs entirely in your browser — no signup and no file uploads. Use the free tool above for instant results — no signup, browser-based, and private.
How does the simple interest calculator work?
This free simple interest calculator runs entirely in your browser — no signup and no file uploads. Use the free tool above for instant results — no signup, browser-based, and private.
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