What is Cap Table Calculator?
Cap Table Calculator is a free, browser-based tool in the Crypto & Finance Tools suite. Model a startup cap table: enter each shareholder (founder, investor, option pool) with shares and price. See ownership percentages, dilution across rounds, and post-money valuation — fully editable in your browser.
The headline benefit: build a capitalization table with founders, investors and an option pool.
Unlike most online tools that upload your file to a server, process it, and send it back, Cap Table Calculator runs entirely in your browser. Open DevTools → Network while using it and you'll see zero file-upload requests — only static assets (JavaScript, CSS, fonts) load. Your data never leaves your device.
Why use this cap table calculator?
Three reasons EasyFileKit's Cap Table Calculator stands out from the crowd:
- **Private by design** — all processing happens locally via JavaScript and WebAssembly. No server ever sees your input.
- **Instant** — no upload wait, no queue, no server round-trip. Results appear the moment you act.
- **Free & unlimited** — no accounts, no watermarks, no daily caps. Use it as many times as you like.
How to use Cap Table Calculator — step by step
Here's the complete walkthrough. Everything happens instantly in your browser:
- **Step 1.** Add each shareholder: name, type (founder / investor / ESOP), and number of shares.
- **Step 2.** For investors, optionally enter the price per share to compute post-money valuation.
- **Step 3.** Add or remove rows as needed; the table recalculates ownership percentages live.
- **Step 4.** Read the post-money valuation, ownership breakdown, and the option pool dilution.
That's it. No sign-up, no upload bar, no waiting. If something doesn't work as expected, check the FAQ below.
Common use cases for Cap Table Calculator
People reach for Cap Table Calculator in a few recurring situations:
- When you need the result **now** and can't wait for a server-based tool to upload, queue, and process your file.
- When your file is **private or sensitive** — financial documents, personal photos, medical PDFs — and you don't want it travelling across the internet.
- When you're on a **slow or metered connection** — uploading a 50 MB file just to compress it makes no sense when the same work can happen locally.
- When you've hit the **daily limit or paywall** on another "free" tool site.
Privacy: what actually happens to your data
This is the single most important point about Cap Table Calculator, so it deserves its own section.
When you use this tool, your input is processed by JavaScript running in your browser tab. The code is downloaded once (cached afterwards) and executes locally on your CPU. At no point is your file, your text, or your input data transmitted to any server.
You can verify this yourself in under 30 seconds:
- Open Cap Table Calculator in your browser.
- Press F12 to open DevTools.
- Switch to the Network tab and tick "Disable cache".
- Use the tool — drop a file, type text, whatever the tool needs.
- Watch the Network log. You'll see only static assets (JS, CSS, fonts, icons). No request contains your data.
This isn't a setting you toggle or a promise in a privacy policy — it's how the tool is architecturally built. There is no upload endpoint to call.
Frequently asked questions about Cap Table Calculator
Q: What is a cap table?
A: A capitalization table lists who owns what percentage of a company — founders, investors, employees with options. It's the source of truth for ownership and dilution.
Q: How is ownership percentage computed?
A: Shareholder shares ÷ total fully-diluted shares × 100. Fully-diluted means including all issued shares plus the option pool (options granted + reserved).
Q: What's the difference between authorized, issued, and fully-diluted?
A: Authorized = max shares the company can issue. Issued = shares actually given to shareholders. Fully-diluted = issued + unissued options + convertible securities. Cap tables typically use fully-diluted.
Q: How do I model a new funding round?
A: Add the new investor as a row with their shares and price. Existing shareholders' percentages will dilute automatically. To model an option pool expansion, add or grow the ESOP row before the round.
Q: Does this handle preferred stock and liquidation preferences?
A: Not in this version. We compute basic ownership. For participating preferred, multiple liquidation preferences, and waterfall modeling, use dedicated cap table software like Carta or Pulley.
Q: Is my cap table data uploaded?
A: No. The whole table is local. Refresh the page and it resets — for persistence, take a screenshot or copy the values.
Cap Table Calculator: EasyFileKit vs server-based tools
Most "free" online tools that do what Cap Table Calculator does follow the same model: you upload your file to their server, they process it with a backend script, then they send the result back. Here's the honest comparison:
| | EasyFileKit | Server-based tools |
|---|---|---|
| **Your file leaves your device?** | Never | Yes, uploaded to a server |
| **Speed** | Instant (no upload) | Slower (upload + queue + download) |
| **Privacy** | Complete | Your file is on someone else's computer |
| **Cost** | Free, unlimited | Often capped or "premium" gated |
| **Works offline** | Yes (PWA) | No |
Server-based tools aren't evil — they exist because some tasks genuinely need heavy backend compute. But for everything Cap Table Calculator does, client-side processing is strictly better for you.
Under the hood: how Cap Table Calculator works
Cap Table Calculator is built with modern browser APIs. Depending on what it does, it may use:
- **Canvas API** — for image manipulation (pixel-level access, filters, resizing).
- **Web Crypto API** — native, hardware-accelerated cryptography (AES-GCM, SHA-256, PBKDF2) for any encryption or hashing.
- **pdf-lib / pdf.js** — fully client-side PDF creation and rendering.
- **MediaRecorder API** — for capturing screen, audio, and video.
- **WebAssembly** — for heavy codecs (image compression, media processing).
All of these run inside your browser's sandbox. They cannot access your filesystem (beyond files you explicitly choose), cannot make network requests with your data, and cannot run persistently in the background.
Pro tips for getting the most out of Cap Table Calculator
- **Bookmark the tool** — it works offline once cached, so you can use it even without a connection.
- **Install EasyFileKit as a PWA** — open the browser menu and choose "Install app" for a standalone window and offline access.
- **Use it on mobile** — every tool is fully responsive and works on phones and tablets, not just desktops.
- **No file size anxiety** — because nothing uploads, you can process large files that server-based tools would reject or charge for.
Try Cap Table Calculator now
The tool is right above this article — scroll up and start using it. No sign-up, no upload, no limits.
If you found Cap Table Calculator useful, explore the rest of the Crypto & Finance Tools suite — there are more tools that work the same private, instant, free way. And if you have a question that isn't covered in the FAQ above, the About page has our contact email.