Interest Rate Converter
Convert any interest rate between annual, monthly, daily, weekly, and quarterly periods. Instantly see APY, APR, and equivalent rates across all compounding frequencies.
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Select the rate type and enter its value
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Conversion method:
8.0000% Annual Rate converts to:
Annual Rate
8.0000%
per year
inputSemi-Annual Rate
3.9230%
per 6 months
Quarterly Rate
1.9427%
per quarter
Monthly Rate
0.643403%
per month
Weekly Rate
0.148112%
per week
Daily Rate
0.02108744%
per day
APY (Effective)
8.3278%
annual yield
What $1,000 Earns
At 8.0000% annual rate (compound)
After 1 Year
+$80.00
interest earned
After 5 Years
+$469.33
interest earned
After 10 Years
+$1158.92
interest earned
Common Annual Rates — Converted
Reference table — benchmark annual rates from 1% to 20% (compound method)
| Annual | Monthly | Daily |
|---|---|---|
| 1% | 0.082954% | 0.00272616% |
| 2% | 0.165158% | 0.00542552% |
| 3% | 0.246627% | 0.00809863% |
| 4% | 0.327374% | 0.01074598% |
| 5% | 0.407412% | 0.01336806% |
| 6% | 0.486755% | 0.01596536% |
| 7% | 0.565415% | 0.01853833% |
| 8%← you | 0.643403% | 0.02108744% |
| 10% | 0.797414% | 0.02611579% |
| 12% | 0.948879% | 0.03105378% |
| 15% | 1.171492% | 0.03829828% |
| 20% | 1.530947% | 0.04996359% |
Results are for informational purposes only and do not constitute financial advice. Actual returns may vary due to market conditions, taxes, and fees. Read our full disclaimer.
How to Convert Between Interest Rate Periods
Converting between annual, monthly, and daily interest rates requires different formulas depending on whether you are working with simple or compound interest. For compound interest, the conversion uses exponential math: a monthly rate r converts to an annual rate of (1 + r)¹² − 1. A daily rate converts to annual as (1 + r)³⁶⁵ − 1. These are not simply multiplied — compounding means each period's interest earns interest in the next, so the true annual equivalent is always slightly higher than the nominal rate multiplied by the number of periods.
Annual Rate vs APY — What's the Difference?
APY (Annual Percentage Yield) is the effective annual rate after accounting for compounding frequency within the year. A bank advertising 5% APR (Annual Percentage Rate) compounded monthly is actually offering an APY of 5.116% — because each month's interest earns additional interest for the remaining months of the year. Always compare financial products using APY, not APR, to see the true annual return. The difference becomes more significant at higher interest rates and more frequent compounding periods.
Why Daily Rates Matter for Borrowers
Credit cards typically charge interest daily on your outstanding balance. An 18% annual rate translates to approximately 0.0493% per day. On a $5,000 balance, that is about $2.47 in interest every single day — or roughly $74 per month before any payments are applied. Understanding the daily rate helps borrowers see the true cost of carrying a balance and the urgency of paying it down quickly. The same compounding math that builds wealth in investments works relentlessly against borrowers who carry high-interest debt.