OSRS Herb Farming Calculator
Optimize your herb runs for maximum GP per hour
0 GP
0.0 Herbs
0 GP
0 GP
Formula: (Yield × Herb Price × Survival Rate) – (Seed Cost + Compost Cost)
Run Financial Breakdown
Visual comparison of Gross Revenue, Total Costs, and Net Profit.
| Metric | Value | Description |
|---|---|---|
| Total Seeds | 9 | Total patches being planted |
| Herb Revenue | 0 GP | Expected income before costs |
| Seed Costs | 0 GP | Total spent on seeds |
| Survival Rate | 98% | Chance of herb patch not dying |
What is an OSRS Herb Farming Calculator?
The osrs herb farming calculator is an essential tool for players of Old School RuneScape looking to maximize their passive income. Farming is one of the most profitable skills in the game, specifically through regular herb runs. However, because seed prices and herb prices fluctuate constantly on the Grand Exchange, players need an osrs herb farming calculator to determine which herb currently offers the highest return on investment (ROI).
Many players mistakenly believe that planting the highest-level herb always results in the most profit. In reality, lower-level herbs like Ranarrs or Toadflax often outperform higher-level herbs like Torstols because of the significant price gap between the seed and the harvested product. This tool takes into account your Farming level, equipment like Magic Secateurs, and compost types to give you a precise profit projection.
OSRS Herb Farming Calculator Formula and Mathematical Explanation
The math behind herb farming is based on a “lives” system. Every herb patch starts with 3 lives. Every time you harvest an herb, there is a chance the patch will not consume a life. Once all 3 lives are consumed, the patch is empty. The osrs herb farming calculator uses the geometric distribution formula to estimate average yield.
The Core Calculation
The average yield per patch can be simplified into this logical flow:
- Base Yield: Determined by compost type (Ultracompost provides the highest base).
- Level Bonus: (Farming Level / 100) * coefficient.
- Multipliers: Magic Secateurs (1.1x), Farming Cape (1.05x), and Attas Plant (approx 1.05x).
- Survival Rate: The probability that a patch survives until harvest (approx 98.1% with Ultracompost).
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Seed Price | Current Grand Exchange cost of one seed | GP | 500 – 80,000 |
| Herb Price | Current Grand Exchange value of one clean herb | GP | 1,000 – 12,000 |
| Yield (Y) | Average herbs harvested per patch | Count | 6.5 – 10.5 |
| Death Rate (D) | Probability of a patch dying | % | 2% – 12% |
Practical Examples (Real-World Use Cases)
Example 1: Ranarr Weeds with Ultracompost
A player with 80 Farming using 9 patches, Magic Secateurs, and Ultracompost. Ranarr seeds are 45,000 GP and Ranarr weeds are 8,200 GP.
- Expected Yield: ~8.6 herbs per patch.
- Total Cost: 414,000 GP (Seeds + Ultracompost).
- Total Revenue: 620,000 GP (8.6 * 8,200 * 9 patches * 0.98 survival).
- Net Profit: ~206,000 GP per run.
Example 2: Toadflax for Low-Risk Profit
Toadflax seeds are very cheap (around 400 GP) while the herbs sell for 2,500 GP. Even with a lower yield, the profit margins are huge because the “buy-in” is almost zero. This is the preferred method for players who don’t want to risk losing 45k on a dead Ranarr patch.
How to Use This OSRS Herb Farming Calculator
- Select Your Herb: Use the dropdown to auto-fill current average prices or enter your own from the Grand Exchange.
- Set Your Stats: Enter your current Farming level to refine the yield estimates.
- Check Your Buffs: Ensure you toggle “Magic Secateurs” if you have them equipped, as they are the single biggest boost to herb yield.
- Input Patch Count: Adjust the number of patches based on your quest and diary completions (e.g., Catherby, Troll Stronghold, Weiss).
- Analyze the Results: Look at the “Profit Per Run” to see if your current setup is optimal. If the number is negative, you are losing money!
Key Factors That Affect OSRS Herb Farming Results
Achieving maximum efficiency with the osrs herb farming calculator requires understanding the variables that influence your GP per hour:
- Compost Type: Always use Ultracompost. It reduces the death rate to roughly 1.9% and significantly increases the minimum yield compared to Supercompost.
- Magic Secateurs: Obtained from the Fairytale I quest, these provide a flat 10% increase to herb yield. They are mandatory for serious farming.
- Farming Level: While not as impactful as compost, every level increases the chance of “saving a life” during harvest, leading to more herbs.
- Disease-Free Patches: Patches in Troll Stronghold, Weiss, and Hosidius (with 50% favor) cannot die. This makes expensive seeds like Ranarrs or Snapdragons much safer to plant there.
- Attas Seed: Planting an Attas Seed in the Anima patch at the Farming Guild provides a global boost to all herb yields for 3.5 days.
- Diary Rewards: The Kourend & Kebos Diary increases the chance of saving lives in the Hosidius patch, and the Catherby Diary increases yield in the Catherby patch.
Frequently Asked Questions (FAQ)
Yes, our calculator uses the community-verified yield formulas based on the geometric distribution of herb “lives” and survival probabilities.
This changes daily. Usually, Ranarrs, Snapdragons, and Toadflax fight for the top spot. Use the osrs herb farming calculator with live prices to be sure.
Yes, you must have them equipped or in your inventory (if you have the Farming Cape) while harvesting to receive the bonus.
Yes, a higher level increases the “chance to save” a life. The difference between level 1 and 99 is approximately 1.5 to 2 herbs per patch.
Even though the seeds are cheap, the increased yield from Ultracompost usually covers the cost of the compost itself, making it worth it.
As of current updates, there are 10 herb patches available (including the Farming Guild and Weiss).
All herbs take 80 minutes to grow, divided into four 20-minute cycles.
Yes, the 5% bonus from the Farming Cape stacks multiplicatively with the 10% from Magic Secateurs.
Related Tools and Internal Resources
- OSRS Money Making Guide – Discover other high-GP activities across Gielinor.
- OSRS Farming Guide – A complete 1-99 leveling guide for the Farming skill.
- Best Herbs to Farm OSRS – A detailed analysis of herb price trends and market stability.
- OSRS Bird House Run Calculator – Optimize your Hunter XP and bird nest profit.
- OSRS Construction Calculator – Plan your POH upgrades and cost to 99.
- OSRS Magic Training Guide – The best ways to level Magic for teleports to farming patches.