Motherlode Mine Calculator

Calculate pay-dirt, nuggets, ore, GP, and time needed to reach your Mining goals

About This Calculator

The Motherlode Mine Calculator helps you plan your Mining training by estimating how many pay-dirt you need to mine, what ores you'll receive, how many golden nuggets you'll earn, the GP value of your ores, and how long it will take to reach your target level or unlock specific rewards.

Ore rates are calculated using the exact game formulas — a cascading roll system where each pay-dirt rolls for ores from highest tier downward. Rates shift as you level up, and this calculator tracks that level-by-level for accurate results.

How to Use

  1. Enter your details: Input your current Mining level and XP, or use the lookup button to fetch them from the OSRS Hiscores
  2. Set your goals: Choose a target level and/or select the rewards you want to unlock with golden nuggets
  3. Configure settings: Choose your pickaxe, mining method, indicate which prospector pieces you already own, and toggle diary/glory bonuses
  4. Calculate: Click the Calculate button to see pay-dirt needed, ore breakdown, nuggets earned, GP estimates, and time

Golden Nugget Rewards

Reward Cost Notes
Prospector Helmet40 nuggets0.4% XP bonus
Prospector Jacket60 nuggets0.8% XP bonus
Prospector Legs50 nuggets0.6% XP bonus
Prospector Boots30 nuggets0.2% XP bonus
Coal Bag100 nuggetsHolds 27 coal
Gem Bag100 nuggetsHolds 60 uncut gems
Soft Clay Pack10 nuggets100 soft clay
Bag Full of Gems40 nuggets40 random gems
Upper Floor Access100 nuggetsReq. 57 Mining
Super Hopper50 nuggetsUpper floor hopper
Pay-dirt Sack Upgrade200 nuggets108 → 189 capacity

Full prospector outfit (180 nuggets total) gives a 2.5% Mining XP bonus. Set bonus is not additive with individual pieces.

Pro Tips

  • Upper Level: Unlocked at 57 Mining for 100 nuggets. Veins last longer and are closer together — significantly faster.
  • Bonus XP from cleaning: Each pay-dirt gives 60 XP when mined, plus bonus XP when cleaned (15 for coal/gold, 30 for mithril, 45 for adamantite, 75 for runite). This calculator factors that in.
  • Falador Elite Diary: Adds roughly +1% runite, +2% adamantite, and +1% mithril chance — worth completing for long-term mining.
  • Ore is determined at mining time: Use boosts (dragon pickaxe spec, dwarven stout) while mining, not while cleaning.
  • Varrock armour: The double-ore bonus from Varrock armour does not work at Motherlode Mine.

Player Information

We'll fetch your current Mining level from the OSRS Hiscores

Your Goals

Configuration

Pay-dirt rates are based on a dragon pickaxe baseline. Using a lower-tier pickaxe will scale the rate down. "Best Available" auto-selects based on your Mining level.

Full set bonus: 2.5% total XP (not additive with individual pieces)

Falador Elite Diary increases high-tier ore rates (~1% runite, ~2% adamantite, ~1% mithril). Amulet of Glory increases gem chance from ~1/256 to ~1/86 while mining.