The Complete Guide to GrindLab: How to Use Every Feature to Exploit Your Opponents

GrindLab is a browser-based poker study tool built for one purpose: helping you exploit real opponents. No downloads, no complex setup — open your browser, sign in with Google or Discord, and you're in.

This guide walks you through every feature of GrindLab, step by step. Whether you just signed up or you've been using the beta for weeks, you'll find practical workflows to get the most out of each tool.

What Is GrindLab?

GrindLab is not a solver. It doesn't tell you the Game Theory Optimal play. Instead, it helps you answer a more profitable question: what should I do against THIS opponent, with THESE tendencies, in THIS spot?

The tool is built around three core features:

• Equity Engine — calculate your equity vs any villain range, street by street
• Range Manager — build, organize, and save ranges for every spot and player profile
• History — every analysis is auto-saved so you can revisit and learn from past sessions

GrindLab runs 100% in the browser on any device — desktop, tablet, or phone. Chrome, Safari, Firefox, Edge — all supported. Your data syncs across devices automatically.

Getting Started

Signing Up

Go to grindlab.gg and click "Start for free." You can sign in instantly with your Google account or your Discord account. No email/password forms, no verification emails — you're inside the tool in seconds.

During the open beta, every feature is unlocked at no cost. No credit card required.

Navigating the Interface

Once logged in, you'll see the main navigation with access to each tool:

• Equity — the Equity Engine for hand analysis
• Ranges — the Range Manager for building and organizing ranges
• History — your saved analyses

Each tool is a standalone page. You can jump between them at any time without losing your work.

Feature 1: The Equity Engine ("Lab a Hand")

This is the core of GrindLab. The Equity Engine lets you analyze any poker hand, street by street, from preflop to river.

How It Works

GrindLab uses Monte Carlo simulation — it runs thousands of random board runouts to calculate your equity against the range you assign to the villain. The more specific you make the villain's range, the more accurate your analysis becomes.

Step-by-Step: Analyzing a Hand

Step 1 — Enter your hole cards. Select your two cards from the card picker. For example, A♠ J♥.

Step 2 — Set the board. If you're analyzing a postflop spot, enter the community cards. You can enter the flop only, flop + turn, or the full board through the river.

Step 3 — Assign the villain's range. This is where exploitation begins. Use the 13x13 hand matrix to select the hands you think the villain can have in this spot. You can:

• Click individual hands to add or remove them
• Use preset ranges (tight, medium, wide) as a starting point
• Apply filters by hand category (pairs, suited connectors, broadway, etc.)
• Adjust combo weights if you think the villain has certain hands at reduced frequency

Step 4 — Enter the action. Specify what the villain did — for example, "Villain bets 15 into 100" (a 15% pot bet). GrindLab will calculate:

• Your equity — your chance of winning at showdown vs this range
• Pot odds — what equity you need to call profitably
• MDF (Minimum Defense Frequency) — how often you need to defend to prevent villain from profiting with any two cards
• Equity vs callers — your equity specifically against the portion of villain's range that would call your raise

Step 5 — Read the verdict. GrindLab gives you a clear, plain-English recommendation. For example: "18.6% equity vs 13.0% needed. Calling is profitable." No ambiguity.

Step 6 — Advance to the next street. Add the turn card and repeat. Then the river. GrindLab tracks your equity progression across every street, so you can see how your situation evolved.

The Range Breakdown Panel

Below the equity calculation, GrindLab breaks down the villain's range by hand category. You'll see exactly what percentage of their range falls into each bucket:

Strong hands: quads, full houses, flushes, straights, sets/trips, two pair, overpairs, top pair.

Weak hands: middle pair, bottom pair, weak pair, ace high, king high, no made hand.

Draws: flush draws, open-ended straight draws, gutshots, backdoor flush draws.

This breakdown is what makes exploitation possible. If you see that 69% of villain's range is weak hands on the flop, that tells you a bet will generate significant fold equity. If villain's range is 40% strong hands, maybe checking is better.

Hand Import (Auto-Import)

Don't want to enter everything manually? Paste a hand history from any major poker room (PokerStars, GGPoker, Winamax, PMU, etc.) directly into GrindLab. The tool automatically parses:

• Your hole cards
• The board cards
• Positions
• Stack sizes
• Betting actions

One paste, and you're ready to analyze.

Tips for Better Equity Analysis

• Be honest with villain ranges. The analysis is only as good as the range you assign. If you give villain too tight a range, you'll overestimate your equity. Too wide, and you'll underestimate it.
• Narrow the range street by street. Start with villain's preflop range, then remove hands that wouldn't take their actual line on each street.
• Use the breakdown panel. Don't just look at the equity percentage — look at what the villain's range is made of.

Feature 2: The Range Manager

The Range Manager lets you build, save, and organize custom ranges for every spot in your game.

Why Build Custom Ranges?

Most players have a vague idea of what they open from each position or how they respond to 3-bets. The Range Manager forces you to make those decisions explicitly, save them, and practice them.

How It Works

The 13x13 matrix. Every Texas Hold'em starting hand is represented in a grid. Pairs run diagonally, suited hands above the diagonal, offsuit hands below.

Building a range:

1. Select the hands you want to include by clicking them on the matrix. Selected hands are highlighted.
2. Assign weights if needed — for example, you might open A5s 100% of the time from the button but only 50% from the hijack.
3. Tag the range with metadata: position (BTN, CO, SB, BB, UTG...), situation (open, vs 3-bet, vs limp...), stack depth (25bb, 50bb, 100bb...), and game type (MTT, cash, SNG).

Organizing your library: Ranges are saved in your library, organized by game type (MTT, Cash, SNG) and position. You can see at a glance how many ranges you've built for each position.

For example, your BTN library might contain:

• Open 25bb — 32% of hands
• Open 50bb — 28% of hands
• vs 3-bet 50bb — 24% of hands
• Open 15bb — 42% of hands

Player profiles: You can assign ranges to player profiles — nit, reg, fish, or custom labels. This is useful when you want to model different types of opponents in the Equity Engine.

Tips for the Range Manager

• Start with your most common spots. Don't try to build 50 ranges on day one. Start with your open-raise ranges for each position at your most played stack depth.
• Review and update. Your ranges should evolve as your understanding improves. Revisit them monthly.
• Use profiles for opponents. Build a "typical fish" range and a "tight reg" range. Use those profiles in the Equity Engine for faster analysis.

Feature 3: History

Every analysis you run in the Equity Engine is automatically saved to your History. No manual saving required.

What's Saved

Each entry in your History includes:

• Your hole cards and the board
• The street you analyzed
• The villain range you assigned
• The equity result
• The date and time
• Any notes or tags you added

How to Use History Effectively

Post-session review: After a poker session, open your History and look at the hands you analyzed. Do you see patterns? Are you consistently overestimating your equity in certain spots?

Tagging system: Tag your analyses with labels like "value," "bluff," "leak," or "spot." Filter by tag later to review specific types of hands.

Track your volume: History shows how many spots you've analyzed over time. Studying 5 hands per day adds up to 150 per month — that's 150 spots where you now have a data-backed answer instead of a guess.

Sharing Your Analyses

GrindLab lets you share any hand analysis via a unique link. When someone clicks it, they see your complete analysis on a dedicated page — the hand, the board, the villain range, the equity, and your notes.

From that shared page, the viewer can create their own analysis — which brings them into GrindLab. This is a great way to discuss hands with your study group or poker friends.

Practical Workflows

Workflow 1: Post-Session Hand Review (15-20 minutes)

This is the highest-value habit you can build as a poker player.

1. After your session, pick 3-5 hands where you felt unsure about your decision.
2. Open the Equity Engine. Enter the hand (or paste the hand history).
3. Assign the villain's range based on what you observed: their position, their player type, their actions on each street.
4. Check the equity. Was your call/fold/raise correct?
5. Look at the range breakdown. Did villain's range have more strong hands than you expected? More draws?
6. Add a note to the analysis.
7. Save and move to the next hand.

Workflow 2: Weekly Range Review (30 minutes)

1. Open the Range Manager.
2. Pick one position per week to audit.
3. Look at your range: are there hands you've been opening that you shouldn't? Hands you should add?
4. Cross-reference with your History: if you keep losing with a specific hand in a specific spot, maybe it shouldn't be in your range.
5. Update the range accordingly.

Workflow 3: Study Group Hand Sharing

1. Analyze a hand you found interesting or where you're unsure of the correct play.
2. Share the analysis link with your study group or poker friends.
3. Each person opens the link, sees your analysis, and can create their own version with a different villain range or interpretation.
4. Compare results and discuss — did your range assumptions lead to the same conclusion?

Tips and Tricks

Mobile use. GrindLab works on mobile, which means you can review hands on the go — during your commute, between tournament breaks, wherever.

Start small. You don't need to use every feature on day one. Start with the Equity Engine. Analyze 2-3 hands after your next session. Once that becomes a habit, start building your ranges in the Range Manager. Layer by layer.

Join the Discord. The GrindLab Discord is where the community discusses hands, shares feedback, and votes on upcoming features. It's also where you'll get the fastest answers to any questions.

Use hand import. Copying and pasting a hand history is dramatically faster than entering everything manually. Get in the habit of exporting your interesting hands from your poker client and pasting them directly into GrindLab.

What's Coming Next

GrindLab is in active development. Here's what's on the roadmap:

• Range Trainer: drill your preflop ranges with random hands and instant feedback. Select a position and scenario, the trainer deals you a hand, and you decide — raise, call, or fold. Build the muscle memory to execute your ranges under pressure.
• RP Trainer (Risk Premium): practice estimating risk premium in tournament spots. Configure a table with stack sizes, and the trainer generates scenarios where you estimate the extra equity needed to call profitably in ICM situations. Essential for MTT players.
• Grinder tier launch (Q2 2026): Free stays free. Premium unlocks advanced ranges, deeper analytics, and additional tools.
• Crusher tier (Q3 2026): Decision trees, advanced exploitation features, and tools for the most dedicated grinders.
• Multi-range support: analyze spots with 2+ villains simultaneously.
• Full tournament suite: ICM calculations, bounty adjustments, and advanced tournament-specific features.

The best way to stay updated and influence what gets built next is to join the GrindLab Discord. Feature requests from the community directly shape the product roadmap.

FAQ

Is GrindLab a GTO solver?

No. GrindLab is an exploitation tool. It doesn't calculate balanced GTO strategies. It helps you find the most profitable response against a specific opponent's range.

How does the equity calculation work?

Monte Carlo simulation. GrindLab runs thousands of random board runouts for your hand vs the villain range you defined, then calculates the win/tie/loss percentages.

Does GrindLab work on mobile?

Yes. It's 100% browser-based and works on Chrome, Safari, Firefox, and Edge — desktop, tablet, and phone.

Is it free?

During the open beta, all features are unlocked at no cost, no credit card needed. After the beta, a Free tier will remain with limited features, and premium tiers (Grinder, Crusher) will unlock full functionality.

Can I import hand histories?

Yes. Paste a hand history from any major poker room and GrindLab auto-parses the cards, positions, and actions.

Is my data private?

Yes. Your ranges, analyses, and history are yours. GrindLab does not share your data with third parties.

What poker formats does GrindLab support?

The Equity Engine works for any Texas Hold'em format — cash games, MTTs, SNGs, Spin & Gos.