Interest & APR Calculators
Calculate simple and compound interest with online interest and APR calculators. See how varying number of periods and compounding frequency affects nominal interest rate, effective interest rate, periodic and equivalent interest rate calculations.
Understanding Interest & APR
Interest rates are the cost of borrowing money or the return earned on savings. Understanding the difference between simple interest, compound interest, APR, and effective interest rates is crucial for making informed financial decisions. Our comprehensive suite of calculators helps you compare loan costs, find true borrowing rates, and maximize your investment returns.
Simple Interest Plus Principal
Calculate the total amount (principal plus interest) using simple interest formula for straightforward loan calculations.
Calculate NowSimple Interest Calculator
Calculate interest only using the simple interest formula. Perfect for short-term loans and basic interest calculations.
Calculate NowCompound Interest Calculator
Calculate compound interest with multiple compounding periods. See how your money grows exponentially over time.
Calculate NowPeriodic Compound Interest
Advanced compound interest calculator using Excel-style periodic calculation methods for precise results.
Calculate NowAPR: Annual Percentage Rate
Calculate the true annual cost of borrowing including fees and charges. Essential for comparing loan offers.
Calculate NowEffective Annual Rate (EAR)
Calculate the true annual return accounting for compound interest effects. Compare investments accurately.
Calculate NowEffective Interest Rate
Determine the actual interest rate after accounting for compounding within a year for better decision making.
Calculate NowNominal Interest Rate
Calculate the stated interest rate before adjusting for inflation or compounding effects.
Calculate NowPeriodic Interest Rate
Convert annual rates to monthly, quarterly, or other periodic rates for accurate payment calculations.
Calculate NowEquivalent Interest Rate
Convert between different compounding frequencies to find equivalent interest rates for fair comparisons.
Calculate NowInterest Rate Table
View comprehensive interest rate tables with various rates and time periods for quick reference.
View TableWhy Use Our Interest Calculators?
Instant Results
Get accurate interest calculations in real-time without any delays.
Precision Accuracy
Professional-grade algorithms ensure reliable financial results.
Mobile Friendly
Calculate on-the-go with full mobile responsiveness.
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