Interest Calculator — Simple & Compound Interest — Calculator
Calculate simple or compound interest for any principal, rate, and time period. Supports annual, monthly, and daily time periods and all compounding.
✓ Formula verified: January 2026For informational purposes only
Interest Calculator
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Total Interest Earned / Owed (Simple)
$2,500.00
Principal
$10,000.00
Total Accrued (Principal + Interest)
$12,500.00
Growth Multiple
▲ 1.250× your money
Formula: A = P(1 + rt)
A = 10,000 × (1 + 5.00% × 5.0000) = $12,500.00
Effective Annual Rate (EAR)
5.0000%
What if your principal amount changes? $9000 → $2,250.00 · $10000 → $2,500.00 · $11000 → $2,750.00
Scenario Comparison
Conservative (5%)
$12,833.59
$2,833.59 interest
Your scenario (7%)
$14,176.25
$4,176.25 interest
Aggressive (10%)
$16,453.09
$6,453.09 interest
High-risk (14%)
$20,056.10
$10,056.10 interest
Best return
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Principal vs. Interest
Principal$10,000
Total Interest$2,500
Total Accrued
$12,500
Growth Multiple
1.25x
Breakdown
Principal: 80.0%Interest: 20.0%Total: $12,500
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