วิธีการคำนวณ Compound
learn.whatIsHeading
Compound interest earns returns on both the initial principal and previously accumulated interest. This creates exponential growth. Simple interest, by contrast, only grows on the original principal.
คำแนะนำทีละขั้นตอน
- 1A = P(1 + r/n)^(nt) for periodic compounding
- 2A = Pe^(rt) for continuous compounding
- 3Rule of 72: years to double ≈ 72 ÷ annual rate %
ตัวอย่างที่มีคำตอบ
อินพุต
$1,000 at 5%, 10 yrs (annual)
ผลลัพธ์
$1,628.89
Interest: $628.89
อินพุต
$1,000 at 5%, 10 yrs (monthly)
ผลลัพธ์
$1,647.01
$18 more from monthly compounding