OSRS Flip Calculator
Type in a buy price, a sell price, and (optionally) a quantity and 4-hour buy limit. The calculator returns your profit net of the 2% Grand Exchange tax, your ROI, your break-even sell price, and your profit per full buy-limit cycle. Nothing here talks to a server; it all runs in your browser.
Formulas: tax = min(floor(sell × 0.02), 5,000,000). Net margin = sell − buy − tax. ROI = net margin ÷ buy. Break-even sell = smallest sell price where net margin is non-negative. All numbers are estimates; live GE prices move.
Formulas, in plain English
- GE tax: 2% of the sell price, rounded down, capped at 5,000,000 GP per sale. Only the seller pays. Some items are exempt (bonds and a few staples).
- Net margin per unit: what actually lands in your bank after one sale = sell − buy − tax.
- ROI: net margin divided by buy price. A useful ordering metric when margins are similar in absolute terms.
- Break-even sell price: the sell price at which net margin is zero. Anything below it and the flip loses money after tax.
- Profit per cycle: net margin × buy limit. This is the real ceiling for one 4-hour cycle if your offers fill.
What this calculator does not tell you
It does not predict whether the flip will actually fill. It does not model volume, competitors, or how far you need to place your offer inside the spread. It also does not guarantee profit. For live rankings against real market volume and stability, use the GE IQ flip finder.