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インフレによる現金価値の減少計算機

マイナスの実質利回りを設定し、長期的にどれだけ購買力が失われるかを計算します。

Time Value of Money (TVM) Calculator

Enter any four variables among N, I/Y, PV, PMT and FV, select the unknown variable and payment timing, then click Calculate.

This tool is for learning and estimation only and does not constitute any investment, loan or financial advice.

TVM Input Area

Payment Timing

Most loans and bonds use end-of-period payments; some rents and annuities use beginning-of-period payments.

Unknown Variable (to be calculated)

Make sure the other four variables are filled in clearly. Empty fields are treated as unknown.

Result

After filling in four variables and selecting the unknown variable, click "Calculate" to see the result here.

Sign convention: Positive numbers usually represent cash inflow (receive), and negative numbers represent cash outflow (pay). For example, taking out a loan: PV is positive (receive money), PMT is negative (repay each period).

This tool is implemented purely in the browser and does not store any data. All calculations are for teaching/learning and estimation only and do not constitute any investment or lending recommendation.

インフレと貯金の価値下落:現金の実質価値シミュレーター

現在の貯金額と予想インフレ率から、将来の購買力をシミュレーションし、「現金のまま寝かせる」リスクを可視化します。