Máy tính lãi đơn
$
%
years
Decimals allowed (e.g. 2.5)
Kết quả
Nhập giá trị của bạn, rồi chọn Tính toán.
Quảng cáo
The detailed guide below is currently available in English.
The simple interest formula
Interest = P × r × t, where P is the principal, r is the annual rate as a decimal, and t is the time in years. A $1,000 deposit at 5% for 3 years earns 1,000 × 0.05 × 3 = $150, giving a final balance of $1,150. Because the base never grows, the same interest amount repeats every year.
Câu hỏi thường gặp
Simple vs. compound interest — which do I have?
Simple interest is common for short-term loans, some auto loans, and bonds that pay a flat coupon. Savings accounts, credit cards, and mortgages almost always compound, so use a compound-interest tool for those.
Can I enter half a year?
Yes. Enter 2.5 years and the formula charges half a year of interest — $25 instead of $50 on $1,000 at 5% per year.