Drill Farm Guide: Best Drills & Rebirth

This guide explains how to progress efficiently in the idle game Drill Farm, covering the best drills to prioritize and exactly how the rebirth system works. You’ll learn which drills give the best long-term value, when to rebirth, and how to avoid common mistakes that slow down your progress.

Formula

The calculator above estimates your profit per second based on drill level and tier. The formula is:

Profit per second = (Level × 10) × (1.5 ^ Tier)

• Level – your drill’s current level (increases with upgrades).
• Tier – the drill’s tier (1 to 10, higher is better).
• Profit per second – coins earned every second from that drill.

The “Cost to next level� is simply (Level + 1) × 50 coins. This is a simplified model; the actual game may have different scaling, but it gives a rough idea of how level and tier interact.

Worked Example

Using the default values: Level = 10, Tier = 3.

1. Calculate the base: 10 × 10 = 100.
2. Apply tier multiplier: 1.5 ^ 3 = 3.375.
3. Profit per second = 100 × 3.375 = 337.5 coins/s.
4. Cost to next level = (10 + 1) × 50 = 550 coins.

So at level 10, tier 3, you earn about 337 coins per second, and it costs 550 coins to reach level 11.

Background: How Drill Farm Works

Drill Farm is an idle/incremental game where you dig for resources and coins. You start with a basic drill and earn coins passively. Coins are used to upgrade your drill’s level, which increases its digging speed and coin output. As you progress, you unlock higher-tier drills that have better multipliers. The core loop is: upgrade → earn more → unlock better drills → repeat.

The game also features a rebirth (or prestige) system. When you rebirth, you reset your current progress (levels, coins, and upgrades) in exchange for a permanent bonus, usually a multiplier to all future earnings. This is a common mechanic in idle games to keep long-term progression meaningful.

How Rebirth Works

Rebirth is typically unlocked after reaching a certain level or earning a specific amount of coins. When you choose to rebirth, you lose your current drill levels and coins, but you gain “Rebirth Points� (or similar currency) based on your total progress. These points can be spent on permanent upgrades that boost your starting power in the next run.

To rebirth effectively:

• Wait until your coin income slows down significantly. If you’re stuck and upgrades take hours, it’s time.
• Rebirth when you can gain a meaningful number of points – usually when the next rebirth would give you at least a 50% increase in your multiplier.
• After rebirth, focus on quickly re-leveling your best drill to surpass your previous peak.

The exact rebirth formula varies by version, but it’s usually based on lifetime earnings or highest level reached. The more you earn before resetting, the more points you get.

Best Drills to Prioritize

Not all drills are equal. Higher-tier drills have better base multipliers, but they also cost more to unlock and upgrade. In general, you want to focus on the highest-tier drill you can afford, because its multiplier outweighs the cost of upgrading lower tiers.

Here’s a rough priority list:

• Tier 1-3: Early game, just upgrade whatever you have. These are cheap and help you get started.
• Tier 4-6: Once you unlock these, switch to them as soon as you can afford the initial cost. The multiplier jump is significant.
• Tier 7-9: These are the endgame drills. Save up for them and pour all upgrades into them.
• Tier 10: The best drill, but extremely expensive. Only viable after several rebirths.

As a rule of thumb, if a higher-tier drill costs less than 10 times your current income per second, it’s worth switching. Otherwise, keep upgrading your current best.

Common Mistakes to Avoid

Many players slow down their progress by making these errors:

• Upgrading every drill equally: Spread your coins across multiple drills, which dilutes your income. Focus on one or two best drills.
• Rebirthing too early: If you rebirth before you’ve made significant progress, you’ll get almost no points and the reset won’t be worth it.
• Ignoring offline earnings: If the game has an offline earnings feature, make sure you’re using it. It can give you a big boost when you come back.
• Forgetting to spend rebirth points: Some players hoard points, but spending them on multipliers is usually better than saving.

Comparing Drill Types

Drills come in different types, such as basic, advanced, and exotic. Basic drills have low multipliers but are cheap. Advanced drills cost more but have higher multipliers. Exotic drills are rare and have the best multipliers, but they require special resources or achievements to unlock.

In practice, you’ll want to use the highest-tier drill you can afford, regardless of type. However, if two drills have similar tiers, the one with the higher base multiplier is better, even if it costs slightly more to upgrade.

Costs and Upgrades

Upgrade costs increase exponentially with level. The formula in the calculator is a simple linear model, but the actual game might use a quadratic or exponential curve. As a result, you’ll eventually hit a point where upgrading your current drill is less efficient than saving for the next tier.

To decide, compare the cost of your next level to the cost of the next drill. If the next drill costs less than 20 times your current income per second, it’s usually worth saving for it.

Frequently Asked Questions

When is the best time to rebirth?

Rebirth when your progress has slowed to a crawl – typically when you can’t afford a meaningful upgrade within an hour. Also, check how many rebirth points you’ll get; if it’s less than 10% of your current total, it’s better to wait.

Do rebirth points carry over?

Yes, rebirth points are permanent. They are not reset when you rebirth again. You can spend them on permanent upgrades that persist across all future runs.

Should I upgrade my drill level or buy a new drill first?

Generally, buy a new drill if it’s a higher tier and you can afford it within a reasonable time (say, 10 minutes of income). Otherwise, upgrade your current drill.

What is the max drill level?

The max level varies by the game version. In the calculator, we allow up to 1000, but the actual cap might be lower. Check the game’s wiki or in-game info for the exact number.

Does offline progress work?

Most idle games have offline progress, but it’s often capped at a certain duration (e.g., 8 hours). Make sure to claim it regularly, and consider upgrading your offline earnings multiplier if available.

Why is my profit per second not matching the calculator?

The calculator uses a simplified formula. The real game may have additional multipliers from upgrades, rebirth points, or temporary boosts. Use it as a rough guide, not an exact prediction.

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in t | Current level | - | 10 | 1 | 1000
in d | Drill tier | - | 3 | 1 | 10
out profit | Profit per second | coins/s | (t * 10) * (1.5 ^ d) | 0
out next | Cost to next level | coins | (t + 1) * 50 | 0