Daily Compound Interest Calculator

💰 How This Calculator Works

Computes growth where interest compounds every day — the most frequent compounding schedule common in high-yield savings accounts and some credit cards.

🔢 Worked Examples

• $10,000 at 4.5% daily compound for 1yr = $10,460 (vs $10,450 annual)
• $50,000 at 6% daily for 5yr = $67,493 (vs $66,912 annual compound)

📋 Common Use Cases

Interest calculators cover compound interest, simple interest, and time-value-of-money concepts. Understanding the difference between nominal and effective rates — and how compounding frequency affects returns — can mean thousands of dollars difference over a savings or investment horizon.

• Comparing savings account yields by compounding frequency
• Computing the true annual rate from a monthly-quoted rate
• Projecting investment growth under different return assumptions
• Understanding the "Rule of 72" for doubling time

💡 Did You Know?

Daily compounding at 5% annual grows money to 5.127% effective rate. Compounding matters more the longer you invest — the difference between annual and daily compounding on a 30-year $10,000 investment is over $1,500.

⚠️ Common Mistake

Some accounts use 360-day years (a financial convention) — the effective rate differs slightly. Always check the account documentation.