Simple Interest Calculator
Calculate simple interest and ending balance from principal, annual rate, and time in years without compounding.
About this tool
Calculate simple interest and ending balance from principal, annual rate, and time in years without compounding. Use values in the units specified by each field and check the assumptions in the result before applying it. The included example demonstrates how the calculation is interpreted. Invalid dates, denominators, and out-of-range values are rejected. Inputs are processed locally in the browser; this utility does not connect to a financial account or external data source.
How to use this tool
- Enter the values in the labeled units.
- Check the assumptions and dates.
- Run the calculation and review the result.
How it works
Simple Interest Calculator applies the named formula or calendar rule to your inputs and returns a readable result.
When to use this tool
- Quick simple interest calculator estimates
- Local calculations without uploading input values
Limitations
The Simple Interest Calculator outputs are estimates and its calendar calculations do not incorporate jurisdiction-specific holidays unless stated.
Privacy
The inputs and results of Simple Interest Calculator remain in browser memory and are not uploaded by this tool.