OSRS calculators

Free calculators for Old School RuneScape, priced with live Grand Exchange data where costs matter:

• DPS calculator - real equipment and monster stats: pick your gear, prayers, potions and target, and compare setups by damage per second and time-to-kill.
• GE tax and flip margin - after-tax proceeds and break-even spread for any buy/sell pair, using the 2% tax rules (5m cap, sub-50 gp exemption).
• Drop rate - the real odds of seeing a drop within N kills, and how many kills for a 50% or 90% chance.
• Skilling planners - cost per XP and total cost to a target level, recalculated from current material prices.

Related: money-making guides with live profit/hr and the Flip Finder.