Tools · 05

Tools

Small, fast financial calculators I am building for my own work. Everything here runs in the browser, with no data leaving your device.

Runs in your browser · nothing is sent anywhere

01 · Calculator

Live

Compound & DCA calculator

A lump sum plus a fixed monthly contribution, compounded monthly. Change any input and the curve redraws.

Final value+170,851 vs. contributions

02 · Sensitivity table

Live

Five years of explicit free cash flow, a perpetuity-growth terminal value, and a grid of value per share across discount rates and growth rates.

Value per share35.85at 8% growth and 9% discount rate

Value per share. Rows are discount rates, columns are growth rates.
r ↓ · g →	4%	6%	8%	10%	12%
7%	44.71	49.19	54.01	59.18	64.73
8%	35.81	39.40	43.27	47.42	51.87
9%	29.64	32.63	35.85	39.29	42.98
10%	25.13	27.67	30.40	33.33	36.47
11%	21.67	23.88	26.25	28.78	31.50

Current assumptions are not on the grid; the nearest cell (8% growth, 9% discount rate) is highlighted.
“—”: the discount rate is at or below terminal growth, so the perpetuity value does not converge. The discount rate must be higher than terminal growth.
Step must be positive and each range must run from low to high.
Each range is capped at 9 steps; the grid was truncated.
Fix the highlighted fields to update the results.
Cash flow and net debt in millions; results in currency per share.

Disclaimer

For learning only, not investment advice. Every result depends entirely on the assumptions you type in.

What is live and what comes next. Each card turns live as its tool ships.

01Live

A lump sum plus fixed monthly contributions, compounded monthly, with the balance-versus-contributions curve.

02Live

Five-year explicit free cash flow, terminal value by perpetuity growth, sensitivity table on discount rate (WACC) and growth.

03Planned

Cost of equity via CAPM, after-tax cost of debt, and capital-structure weights with a live output.

04Planned

Paste a peer set, get EV/EBITDA, P/E and growth-adjusted multiples with median and quartile lines.

05Planned

Price-to-yield and yield-to-price, Macaulay and modified duration, convexity.