Finance calculators

Loans, investing, and the math behind everyday money decisions.

Run the numbers on mortgages, loans, credit cards, investments, and retirement — with transparent formulas and editable assumptions.

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Topics: All Mortgage (23) Loans (11) Investing (65) Retirement (8) Budgeting (27)

Finance / Investing

Bond Macaulay Duration from Coupon and YTM Calculator

Calculates Macaulay duration = Σ(t × PV(CF_t)) / Bond Price and modified duration = Macaulay / (1 + YTM/n) for a coupon-...

basic

20,399 4.8 1 min

Finance / Investing

WACC from Equity, Debt, and Tax Rate Calculator

Calculates WACC = (E/V)·r_e + (D/V)·r_d·(1−T), where E is equity value, D is debt value, V = E+D, r_e is cost of equity,...

basic

16,146 3.8 1 min

Finance / Investing

Bond Convexity from Duration and YTM Calculator

Estimates bond convexity and the percentage price change from a yield shift ΔP/P ≈ −D_mod·Δy + ½·Convexity·(Δy)². Convex...

basic

2,832 4.7 1 min

Finance / Investing

Sharpe Ratio Portfolio Performance Calculator

Calculates the Sharpe Ratio of a portfolio from its return, the risk-free rate, and its standard deviation to measure ri...

basic

12,335 4.4 1 min

Finance / Investing

IRR Approximation from NPV at Two Discount Rates Calculator

Approximates IRR using linear interpolation: IRR ≈ r₁ + NPV₁ / (NPV₁ − NPV₂) × (r₂ − r₁), given NPV at two discount rate...

basic

6,169 4.6 1 min

Finance / Investing

Gordon Constant-Growth Model Terminal Equity Value Calculator

Calculates stock intrinsic value P = D₁/(k−g) where D₁ is the next dividend, k is required return (CAPM or assumed), and...

basic

3,354 4.4 1 min

Finance / Investing

Two-Asset Portfolio Expected Return and Variance Calculator

Calculates portfolio return E[R_p] = w₁R₁ + w₂R₂ and variance σ²_p = w₁²σ₁² + w₂²σ₂² + 2w₁w₂ρσ₁σ₂ for two assets with gi...

basic

2,892 3.9 1 min

Finance / Investing

Simple Return on Investment Multiple Calculator

Calculates simple ROI percentage, profit/loss, and the investment multiple (MOIC) from total cost and total gain. Useful...

basic

14,365 4.3 1 min

Finance / Investing

Profitability Index (Benefit-Cost Ratio) Calculator

Calculates the Profitability Index (PI) or Benefit-Cost Ratio from initial investment and present value of future cash f...

basic

6,605 5.0 1 min

Finance / Investing

CAPM Required Return on Equity Calculator

Calculates the required return using CAPM: r = Rf + β(Rm − Rf). Identifies the equity risk premium, the systematic risk...

basic

5,840 4.7 1 min

Finance / Investing

529 College Savings Calculator

Project the future value of a 529 college savings plan from current balance, monthly contributions, expected return, and...

basic

3,222 4.0 1 min

Finance / Investing

Average Accounting Rate of Return (ARR) Calculator

Calculates ARR = average annual accounting profit / average book value of investment. Simple payback-related metric used...

basic

1,723 4.7 1 min

Finance / Investing

IRR Investment Return Hurdle Calculator

Estimates Internal Rate of Return (IRR) using linear interpolation between two trial discount rates that bracket NPV = 0...

basic

23,653 4.0 1 min

Finance / Investing

NPV from Multiple Cash Flows and Discount Rate Calculator

Calculates NPV = Σ CF_t/(1+r)^t − Initial investment for up to 5 periods. Positive NPV indicates value creation.

basic

16,695 3.9 1 min

Finance / Investing

Risk-Adjusted Discount Rate from Beta and Market Premium Calculator

Estimates a risk-adjusted discount rate for a project: RADR = Rf + β_project · (Rm − Rf). Compares to the company WACC t...

basic

15,174 4.0 1 min

Finance / Investing

Venture IRR Target and Dilution Calculator

Calculates the required investment multiple to hit a target IRR over a given horizon and estimates post-dilution ownersh...

basic

14,527 4.9 1 min

Finance / Investing

Mutual Fund Expense Ratio Long-Run Impact Calculator

Calculates the long-run impact of a mutual fund's annual expense ratio on portfolio growth by comparing it to a hypothet...

basic

8,201 4.0 1 min

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Finance calculators

Bond Macaulay Duration from Coupon and YTM Calculator

WACC from Equity, Debt, and Tax Rate Calculator

Bond Convexity from Duration and YTM Calculator

Sharpe Ratio Portfolio Performance Calculator

IRR Approximation from NPV at Two Discount Rates Calculator

Gordon Constant-Growth Model Terminal Equity Value Calculator

Two-Asset Portfolio Expected Return and Variance Calculator

Simple Return on Investment Multiple Calculator

Profitability Index (Benefit-Cost Ratio) Calculator

CAPM Required Return on Equity Calculator

529 College Savings Calculator

Average Accounting Rate of Return (ARR) Calculator

IRR Investment Return Hurdle Calculator

NPV from Multiple Cash Flows and Discount Rate Calculator

Risk-Adjusted Discount Rate from Beta and Market Premium Calculator

Venture IRR Target and Dilution Calculator

Mutual Fund Expense Ratio Long-Run Impact Calculator