Compute your decimal interest and estimated monthly royalty from your own acreage, lease, and production numbers — with live WTI and Henry Hub benchmarks prefilled (editable). Your numbers, your math: this is income arithmetic, not a valuation.
Enter your numbers above — results update instantly. Gross figures, before severance taxes and any lease-permitted deductions.
This is arithmetic, not a valuation. It computes gross royalty from the numbers you enter. Actual checks subtract severance taxes and lease-permitted deductions and use your operator's realized prices. What your minerals are worth also depends on decline, undrilled inventory, and operator — request a free written offer for that number. Educational only; not financial advice.
A written offer prices the whole asset — decline, inventory, lease terms — not just this month's check. Free, no obligation.
Get a Free Written OfferDecimal = (NMA ÷ Unit acres) × Royalty rate
Monthly gross ≈ Decimal × (Oil bbl × $/bbl + Gas MCF × $/MCF)
Full walk-through with verification steps: How royalties are calculated →
Decimal interest = (your net mineral acres ÷ the producing unit's acres) × your lease royalty rate. Example: 40 NMA in a 640-acre unit at a 25% royalty = (40 ÷ 640) × 0.25 = 0.015625. It should match your division order.
The calculator estimates gross royalty from your inputs. Real checks subtract state severance taxes and any lease-permitted post-production deductions, and use the operator's realized price (benchmark minus regional basis), which differs from quoted benchmarks.
Use the rate in your lease: commonly 1/8 (12.5%), 3/16 (18.75%), or 1/4 (25%). If you are modeling a new lease, 25% is the owner-favorable target in competitive areas.
No — it computes income arithmetic from your own numbers, not a valuation. What minerals are WORTH also depends on decline, undrilled inventory, operator, and market conditions. For a real number, request a free written offer.