📊 經濟學工具

⏱️ 72 法則計算器Rule of 72 輸入年化收益率，按 72 法則估算本金翻倍所需年數（72÷收益率%），用於投資回報的快捷心算與科普。Rule of 72 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📊 CAGR 計算器Cagr CAGR = (終值 / 初值)^(1/n) − 1Cagr - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔗 交叉價格彈性計算器Cross Elasticity 輸入相關商品需求量與價格變動，計算交叉價格彈性，判斷商品間替代或互補關係，用於定價與市場競爭分析。Cross Elasticity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 💰 複利終值計算器Compound Amount 複利終值計算器，按本金、年利率、每年複利次數與年限求終值，用於投資與理財規劃。Compound Amount - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 👥 失業率計算器Unemployment Rate u = 失業人數 / 勞動力 × 100%Unemployment Rate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📉 奧肯定律計算器Okuns Law Δu ≈ −½(實際增長 − 潛在增長)Okuns Law - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🏦 實際 GDP = 名義 GDP / (1 + 平減指數%)Real Gdp 實際 GDP 計算器，用 GDP 平減指數剔除價格變化得實際產出，用於經濟增長真實比較。Real Gdp - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🧾 年金現值計算器Annuity Present Value 輸入每期期末收款 PMT、期數 N 與每期利率 i，按折現計算等額年金的當前價值，適用於年金保險與分期收款估值。Annuity Present Value - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📅 年金終值計算器Fv Annuity 輸入每期期末存入金額 PMT、期數 N 與每期利率 i，按複利計算等額年金在期末的累積終值，適用於儲蓄與教育金規劃。Fv Annuity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 💼 收入彈性計算器Income Elasticity 收入彈性線上計算器，輸入需求量與收入變動率求得需求收入彈性，判斷正常品或劣等品，用於微觀經濟分析，純前端。Income Elasticity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔄 政府支出乘數計算器Spending Multiplier 政府支出乘數計算器，按邊際消費傾向 MPC 求政府購買乘數，用於財政政策效應分析。Spending Multiplier - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 💵 現值計算器Present Value 現值（PV）線上計算器，輸入未來金額、折現率與期數求得當前價值，用於投資與理財決策，純前端執行。Present Value - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 由兩期 GDP 求增長率Gdp Growth Rate 輸入本期與基期 GDP，按 g=(GDP_t−GDP_{t−1})/GDP_{t−1} 計算經濟增長率，用於宏觀經濟增速的直觀測算。Gdp Growth Rate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🏭 由產量與勞動增量求邊際產量Marginal Product Labor 勞動邊際產量計算器，輸入產量增量 ΔQ 與勞動增量 ΔL 按 MPL=ΔQ/ΔL 求邊際產量，用於生產函式分析。Marginal Product Labor - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. ⚡ 由價格水平、產出與貨幣量求流通速度Velocity of Money 貨幣流通速度計算器，輸入價格水平 P、實際產出 Y 與貨幣量 M 按 V=P·Y/M 求流通速度，用於貨幣數量論。Velocity of Money - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. ⚖️ 由出口與進口求貿易差額Balance of Trade 貿易差額計算器，輸入出口 X 與進口 M 按 BoT=X−M 求貿易順差或逆差，用於國際收支分析。Balance of Trade - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 👥 由勞動力與總人口求勞動參與率Labor Force Participation 勞動參與率計算器，輸入勞動力 LF 與適齡人口 POP 按 LFP=LF/POP 求參與率，用於就業市場分析。Labor Force Participation - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. ⚖️ 由名義值與通脹率求實際值Nominal to Real 名義轉實際值計算器，輸入名義值與通脹率 π 按 Real=Nominal/(1+π) 剔除價格影響，用於實際變數分析。Nominal to Real - convert values online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Econom... 💯 由實際利率與通脹求名義利率Fisher Equation 費雪方程計算器，輸入實際利率 r 與通脹率 π 按 i≈r+π 求名義利率，用於利率與通脹分析。Fisher Equation - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 👥 由就業與失業人數求勞動力Labor Force 勞動力規模計算器，輸入就業人數 E 與失業人數 U 按 LF=E+U 求勞動力總量，用於宏觀經濟統計。Labor Force - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 由支出乘數反推邊際消費傾向Mpc from Multiplier 輸入支出乘數 k，按 MPC=1−1/k 反推邊際消費傾向，用於宏觀經濟學中乘數效應與消費行為的教學分析。Mpc from Multiplier - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📊 由支出分項求 GDPGdp Expenditure 輸入消費 C、投資 I、政府支出 G 與淨出口 NX，按支出法 Y=C+I+G+(X−M) 計算國內生產總值，用於宏觀核算。Gdp Expenditure - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 由消費與收入增量求邊際消費傾向Marginal Propensity Consume 邊際消費傾向計算器，輸入消費增量 ΔC 與收入增量 ΔY 按 MPC=ΔC/ΔY 求邊際消費傾向，用於乘數分析。Marginal Propensity Consume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🥧 由消費與收入求平均消費傾向Average Propensity Consume 平均消費傾向計算器，輸入消費 C 與收入 Y 按 APC=C/Y 求消費佔收入比重，用於消費行為分析。Average Propensity Consume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔢 由資本、勞動與技術求產出Cobb Douglas 輸入全要素生產率 A、資本投入 K、資本彈性 α 與勞動 L，按生產函式 Y=A·K^α·L^(1−α) 計算產出，用於宏觀與增長分析。Cobb Douglas - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📉 由邊際消費傾向求稅收乘數Tax Multiplier 稅收乘數計算器，輸入 MPC 按 k_t=−MPC/(1−MPC) 求稅收乘數，用於減稅效應分析。Tax Multiplier - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 通貨膨脹率計算器Inflation Rate 輸入兩期消費者價格指數 CPI，計算時期通貨膨脹率，用於物價水平變化與貨幣購買力的量化評估。Inflation Rate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔁 需求價格彈性計算器Elasticity Demand 需求價格彈性計算器，用中點法求需求量對價格的彈性(避免端點依賴)，用於定價與需求分析。Elasticity Demand - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools.