🏦 储蓄计算器

计算定期存款和储蓄计划的最终金额，优化您的储蓄策略

初始存款（元）

每月存款（元）

年利率（%）

存款期限（年）

计息方式

最终存款总额 -

总存入本金 -

累计利息收益 -

实际收益率 -

Savings Calculator Guide

储蓄计算器是一款帮助您快速估算存款收益的在线工具。无论您是计划定期存款、制定储蓄目标，还是比较不同存款方案的效果，本计算器都能为您提供清晰的数据参考。支持按月计息、按年计息和单利三种模式，满足不同存款场景的计算需求。

使用步骤：

输入初始存款：填写您计划一次性存入的起始金额。例如，您现有 ¥10,000 准备存入银行。
设置每月存款金额：填写您每月计划定期存入的金额。如果您不打算每月追加存款，可以填 0。此项为可选。
填写年利率：根据您选择的存款产品，填写银行给出的年化利率。例如，当前银行定期存款年利率约为 1.5%–2.5%，大额存单可达 2.5%–3.0%。
设定存款期限：填写您计划存款的年数。存款期限越长，利息收益越高。
选择计息方式：选择"按月计息"（每月结算利息并计入本金）、"按年计息"（每年结算一次）或"单利"（仅对初始本金计息，不计算复利）。
点击"开始计算"：系统将自动计算并显示最终存款总额、总存入本金、累计利息收益和实际收益率。

The Savings Calculator is an online tool that helps you quickly estimate deposit returns. Whether you're planning a fixed deposit, setting savings goals, or comparing different savings plans, this calculator provides clear data references. It supports monthly compounding, annual compounding, and simple interest modes to meet various savings scenarios.

How to Use:

Enter Initial Deposit: Fill in the starting amount you plan to deposit. For example, you have $10,000 ready to deposit in a bank.
Set Monthly Deposit Amount: Enter the amount you plan to save each month. If you don't intend to make monthly additions, enter 0. This field is optional.
Enter Annual Interest Rate: Based on your deposit product, enter the annual interest rate offered by the bank. For instance, current fixed deposit rates range from about 1.5%–2.5%, while certificates of deposit (CDs) may reach 2.5%–3.0%.
Set Deposit Period: Enter the number of years you plan to save. The longer the period, the greater the interest earnings.
Select Interest Method: Choose "Monthly Compounding" (interest calculated and added monthly), "Annual Compounding" (interest calculated once per year), or "Simple Interest" (interest calculated only on the initial principal, no compounding).
Click "Calculate": The system will automatically compute and display the final total, total principal deposited, cumulative interest earned, and effective rate of return.

Savings Calculation Formulas

本储蓄计算器支持两种计息方式，公式如下：

一、复利计算（按月/按年计息）

最终金额由两部分组成——初始本金的复利终值和每月定投的年金终值：

A = P × (1 + r/n)^nt + PMT × [((1 + r/n)^nt - 1) / (r/n)]

其中各参数含义：

A = 最终存款总额（本金 + 利息）
P = 初始存款金额
PMT = 每月定期存入金额
r = 年利率（以小数表示，如 2.5% = 0.025）
n = 每年计息次数（按月计息 n=12，按年计息 n=1）
t = 存款年限

二、单利计算

单利仅对初始本金计算利息，每月存入的金额不产生利息：

A = P + P × r × t + PMT × n × t

其中利息部分 = P × r × t，即只对初始本金按年利率和存款年限计算利息。

This savings calculator supports two interest calculation methods, with formulas as follows:

1. Compound Interest (Monthly/Annual Compounding)

The final amount consists of two parts — the future value of the initial deposit and the future value of regular monthly deposits (ordinary annuity):

A = P × (1 + r/n)^nt + PMT × [((1 + r/n)^nt - 1) / (r/n)]

Where each parameter means:

A = Final total amount (principal + interest)
P = Initial deposit amount
PMT = Monthly regular deposit amount
r = Annual interest rate (in decimal form, e.g., 2.5% = 0.025)
n = Number of compounding periods per year (monthly n=12, annually n=1)
t = Number of years saved

2. Simple Interest

Simple interest is calculated only on the initial principal; monthly deposits earn no interest:

A = P + P × r × t + PMT × n × t

Where the interest portion = P × r × t — interest is calculated only on the initial principal based on the annual rate and deposit period.

Calculation Example

场景：小李初始存入 ¥10,000，每月定期存入 ¥2,000，年利率 2.5%，存款期限 5 年，按月计息（复利）。

计算参数：

初始存款 P = ¥10,000
每月存款 PMT = ¥2,000
年利率 r = 2.5% = 0.025
计息频率 n = 12（按月计息）
存款年限 t = 5 年（共 60 个月）

计算结果：

初始本金复利终值：¥10,000 × (1 + 0.025/12)⁶⁰ ≈ ¥11,330.37
每月定存终值：¥2,000 × ((1 + 0.025/12)⁶⁰ - 1) / (0.025/12) ≈ ¥127,748.56
最终存款总额：约 ¥139,078.93
总存入本金：¥10,000 + ¥2,000 × 60 = ¥130,000.00
累计利息收益：约 ¥9,078.93
实际收益率：约 6.98%

通过这个例子可以看到，即使年利率只有 2.5%，坚持每月定期存款 5 年也能获得约 ¥9,078 的利息收益。如果延长存款期限或提高每月存入金额，复利效应将更加显著。

Scenario: Sarah starts with $10,000, deposits $2,000 monthly, at an annual interest rate of 2.5%, for 5 years, compounded monthly.

Parameters:

Initial Deposit P = $10,000
Monthly Deposit PMT = $2,000
Annual Rate r = 2.5% = 0.025
Compounding Frequency n = 12 (monthly)
Deposit Period t = 5 years (60 months total)

Results:

Future value of initial deposit: $10,000 × (1 + 0.025/12)⁶⁰ ≈ $11,330.37
Future value of monthly deposits: $2,000 × ((1 + 0.025/12)⁶⁰ - 1) / (0.025/12) ≈ $127,748.56
Final Total: ≈ $139,078.93
Total Principal Deposited: $10,000 + $2,000 × 60 = $130,000.00
Total Interest Earned: ≈ $9,078.93
Effective Rate of Return: ≈ 6.98%

This example shows that even at a modest 2.5% annual rate, consistently depositing monthly over 5 years can earn approximately $9,078 in interest. Extending the deposit period or increasing the monthly amount will make the compounding effect even more significant.

Frequently Asked Questions

1. 储蓄计算器计算的结果准确吗？

本计算器基于标准的复利和单利数学公式进行计算，结果在数学上是精确的。但实际银行存款收益可能因以下因素略有差异：银行实际计息规则（如按日计息、算头不算尾等）、利息税政策变化、存款期间利率调整等。因此，计算结果仅供参考，实际收益以银行出具的存款凭证为准。

1. Are the savings calculator results accurate?

This calculator uses standard compound interest and simple interest mathematical formulas, so the results are mathematically precise. However, actual bank deposit returns may vary slightly due to: the bank's specific interest calculation rules (e.g., daily interest calculation, inclusive/exclusive day counting), changes in interest tax policies, and interest rate adjustments during the deposit period. Therefore, results are for reference only — actual returns are subject to the deposit certificate issued by the bank.

2. 每月存款和一次性存入哪个更划算？

这取决于您的资金状况和理财目标。一次性存入的优势在于全部本金从第一天起就开始产生利息，复利效应更充分，最终收益更高。每月定存的优势在于门槛低、压力小，适合工薪阶层通过工资结余逐步积累。如果手边有一笔闲置资金，一次性存入收益最大；如果是从每月收入中节省，则每月定存是更好的选择。实际上，两者结合效果最佳。

2. Is it better to make a lump-sum deposit or monthly deposits?

It depends on your financial situation and goals. Lump-sum deposits have the advantage that the entire principal starts earning interest from day one, maximizing the compounding effect and yielding higher final returns. Monthly deposits have the advantage of lower entry barriers and less financial pressure, making them ideal for salaried individuals who save from their monthly income. If you have a sum of idle funds, a lump-sum deposit maximizes returns; if you're saving from monthly income, regular monthly deposits are the better choice. In practice, combining both approaches works best.

3. 如何选择最合适的存款利率？

选择存款利率时需要权衡收益性和流动性。一般来说，定期存款利率高于活期存款，但提前支取会按活期利率计息。建议策略：（1）将资金分成多笔，分别选择不同期限（如 1 年、2 年、3 年），形成"阶梯存款"，兼顾收益和灵活性；（2）大额资金可考虑大额存单，利率通常更高；（3）关注银行促销活动和新型存款产品，部分中小银行会提供更有竞争力的利率。

3. How to choose the best deposit interest rate?

Choosing a deposit rate requires balancing returns and liquidity. Generally, fixed-term deposits offer higher rates than demand deposits, but early withdrawal reverts to the demand rate. Recommended strategies: (1) Split funds into multiple deposits with different terms (e.g., 1-year, 2-year, 3-year) to create a "ladder deposit" strategy that balances yield and flexibility; (2) For large amounts, consider certificates of deposit (CDs), which typically offer higher rates; (3) Watch for bank promotions and new deposit products — some smaller banks offer more competitive rates.

4. 定期存款和大额存单（CD）有什么区别？

定期存款门槛低（一般 50 元起存），利率相对固定，适合小额储蓄；大额存单（CD）起存金额较高（通常 20 万元起），但利率一般比普通定期存款高 0.1%–0.5%，且部分大额存单支持转让，流动性更好。此外，大额存单通常有更安全的产品保障。如果您的可支配资金达到大额存单的起存门槛，优先选择大额存单可以获得更高收益；如果资金量较小，普通定期存款同样安全且灵活。

4. What is the difference between a regular savings deposit and a Certificate of Deposit (CD)?

Regular savings deposits have a low minimum (often as little as $50), with relatively fixed rates, making them suitable for small-scale savings. Certificates of Deposit (CDs) require a higher minimum deposit (typically $1,000–$100,000+), but generally offer rates 0.1%–0.5% higher than regular fixed deposits, and some CDs are transferable, providing better liquidity. Additionally, CDs often come with stronger product guarantees. If your available funds meet the CD minimum threshold, prioritizing CDs can earn higher returns; for smaller amounts, regular fixed deposits are equally safe and flexible.

🏦 储蓄计算器