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生活防衛資金・必要額計算機

家計の固定費と変動費をもとに、どの程度の現金クッションが必要かを可視化します。

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.

緊急予備資金シミュレーター:収入ゼロでも何ヶ月暮らせる?

毎月の生活費と現在の貯蓄額から、無収入期間でも生活を維持できる月数を計算し、目標とすべき緊急資金規模を把握します。