How do I model weekly or daily compounding?
Use the compounding selector to match the institution’s schedule. The formula automatically adjusts n to daily (365) or weekly (52) when chosen.
Step-by-step walkthrough
Compound Interest Calculator Guide
Use this companion guide beside the interactive calculator to make sure you understand the “why” behind every click. Each section includes the classroom explanation, student-friendly language, and quick practice prompts.
Before you start
Collect the data points listed below and double-check their units. Keeping an organized “givens” list is one of the fastest ways to reduce math errors and impress exam graders.
- investment
- compound
- interest
Detailed procedure
Step 1
Enter your starting balance and the contribution you plan to add each period.
Step 2
Provide the annual return rate, years invested, and compounding frequency.
Step 3
Scan the projection to compare total contributions versus growth generated by compounding.
Teaching & troubleshooting tips
Can I skip contributions entirely?
Yes. Set the contribution to zero and the calculator reverts to the classic compound interest formula using only the initial deposit.