Oil & gas royalty calculator
Work out roughly what your royalty check should be from your acres, your royalty rate, and a month of production. No email required, and the formula is printed right below the result.
Want the bigger picture on what your minerals are worth? Read our mineral rights value guide →
These are estimates, not a guarantee. Real checks vary with post-production deductions, severance and property taxes, price differentials, and the exact terms of your lease. And because wells decline over time, a number built on one month of production is a snapshot — not what you'll receive every month going forward.
How this calculator works
The math is two steps. First it finds your decimal interest — your share of everything the well sells: decimal interest = (net mineral acres ÷ unit acres) × royalty rate. Then it multiplies that decimal by the value of a month of production — oil barrels × oil price + gas Mcf × gas price — to get your gross monthly royalty. Annual is simply that figure times twelve.
It intentionally ignores taxes and post-production deductions, so treat the output as a gross, before-deductions snapshot. Not sure of your acreage? Start with the net mineral acres calculator, then come back. For the full picture on what producing minerals are worth, see our mineral rights value guide.
Get a real cash offer — not just an estimate
We buy mineral and royalty interests directly — tell us what you have and we'll review your specific minerals against live permit, production, and lease data, then come back with a firm, no-obligation cash offer.
- No obligation, no fees. A free offer and a clear number. Walk away anytime — there is never a fee to you.
- We do the homework. We run your tract against the same permit, production, and ownership data the pros use.
- Close on your timeline. Cash at closing, title handled. Sell all of it, or just a piece.
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Thanks — we've received your details and we'll review your minerals and reach out within one business day with next steps. Check your email for a confirmation.
Oil & gas royalty questions
How are oil and gas royalties calculated?
Your royalty check is your decimal interest times the value of everything a well sells in the period. Decimal interest = (your net mineral acres ÷ the spacing/unit acres) × your royalty rate. Multiply that decimal by the month's production value — oil barrels × oil price plus gas Mcf × gas price — and you have the gross royalty before taxes and any deductions. Not sure of your net mineral acres?
What is a typical oil and gas royalty rate?
Most modern leases fall between one-eighth (12.5%) and one-quarter (25%). One-eighth was the historical standard; three-sixteenths (18.75%) and one-fifth (20%) are common today, and one-quarter shows up in the most competitive, active areas. The rate is set in your lease — check that document rather than guessing.
How much do oil royalties pay per acre?
There is no fixed per-acre number — it depends entirely on how much a well produces, the commodity price, your royalty rate, and how many acres share the unit. A single acre in a strong new horizontal well can pay far more than forty acres over an old, low-volume well. Run your own numbers above: the calculator divides your acres by the unit size, so it shows what your specific slice earns rather than a made-up average.
Do royalty payments change over time?
Yes, and usually downward. Wells decline — a new horizontal well can lose a large share of its first-year rate within a couple of years — so a check based on today's production is a snapshot, not a forecast. Payments also move with oil and gas prices, added or shut-in wells, and lease deductions. Treat any single-month estimate as a starting point, not a guarantee.