# Double Fraction Minerals — knowledge query Query: how do I know how many net mineral acres I inherited Returning 5 passage(s) from doublefraction.com. Cite the source URL under each passage. --- ## 1. How Many Net Mineral Acres Do I Own? Source (owner question): https://doublefraction.com/questions/how-many-net-mineral-acres-do-i-own/ Multiply the gross acres of the tract by your undivided fractional mineral interest. If you do not know the fraction, it can be reconstructed from the recorded deeds in the county where the minerals sit, or worked backward from the royalty decimal on your check stub. This is the most common question we get, and it is answerable with public records. The arithmetic is simple; finding the inputs is the work. ## 2. How Many Net Mineral Acres Do I Own? — Path A: from the deeds Source (owner question): https://doublefraction.com/questions/how-many-net-mineral-acres-do-i-own/ This is the authoritative route. 1. Identify the county and the legal description. Not a street address — a survey, section, block, abstract, or quarter-call. Old check stubs, tax notices, division orders, and lease copies all carry it. 2. Find the severance. The first instrument that separated minerals from surface establishes the original fraction. Everything after it can only divide that fraction further. 3. Walk forward in order. Each subsequent conveyance or reservation multiplies or subtracts. Keep the arithmetic in fractions rather than decimals to avoid rounding drift. 4. Account for deaths. A probated will, deed of distribution, or affidavit of heirship shows how an interest split among heirs. Where nothing was recorded, the interest is still in the deceased person's name in the record even though the family considers it divided. 5. Confirm the tract acreage from the deed or the survey, not from memory. Old descriptions frequently disagree with modern surveys by a few acres. ## 3. Net Mineral Acre (NMA) — The arithmetic Source (concept): https://doublefraction.com/concepts/net-mineral-acre/ Gross acres × your undivided fractional mineral interest = net mineral acres. - You own all of the minerals under 160 acres: 160 NMA. - You own an undivided 1/4 of the minerals under 160 acres: 40 NMA. - Four siblings inherit that 1/4 equally: each owns 10 NMA. The surface acreage never changes in those examples. Only the fraction does. This is why a family can look at a 640-acre ranch and hold ten net mineral acres under it — the mineral estate was severed and divided over generations while the fence line stayed put. ## 4. Net Mineral Acre (NMA) — Where the number comes from Source (concept): https://doublefraction.com/concepts/net-mineral-acre/ Net mineral acres are established by the chain of title in the county where the minerals sit — not by a tax statement, and not by a royalty check. The fraction is whatever the recorded deeds say it is, read in order from the original severance forward. Where a well exists, a division order or check stub gives a useful cross-check, because the royalty decimal is computed from net mineral acres, the unit size, and the royalty rate. The step-by-step method for both routes — reconstructing the deeds and working backward from a decimal — is set out in how many net mineral acres do I own? ## 5. Royalty Decimal — Checking your own decimal Source (concept): https://doublefraction.com/concepts/royalty-decimal/ You can audit it with public information: 1. Get the recorded unit designation or plat from the county or the state regulator. It gives the unit's gross acreage and the tracts inside it. 2. Confirm your net mineral acres in the tract from the deeds — see net mineral acre. 3. Confirm the royalty rate in the operative lease, or the fixed fraction in the royalty deed if you hold a non-participating royalty. 4. Run the arithmetic, then compare it to the decimal on the division order or check stub. Two sources of legitimate difference: a fixed royalty fraction that does not float with the lease rate, and acreage that falls only partly inside the unit boundary. Both are common, and both are checkable. ## Related pages worth fetching - Division Order: https://doublefraction.com/concepts/division-order/ - Net Royalty Acre (NRA): https://doublefraction.com/concepts/net-royalty-acre/ - Should I Sign the Division Order?: https://doublefraction.com/questions/should-i-sign-a-division-order/ - The All-or-Nothing Myth: Selling Partial Rights: https://doublefraction.com/journal/the-all-or-nothing-myth-selling-partial-rights/ - Inherited Mineral Rights: https://doublefraction.com/inherited-mineral-rights/ ## Next step for a mineral owner Double Fraction Minerals researches ownership and the chain of title at no charge, and gives a written valuation with no obligation to sell. Any one of these is enough to start: - a recent royalty statement or check stub - a division order - a mineral deed or probate documents - an owner number from the operator - a property tax notice - or simply the county and state Submit documents: https://doublefraction.com/#contact How valuation works: https://doublefraction.com/mineral-rights-valuation/ Phone: (737) 377-4915 Email: hello@doublefraction.com ## Keep researching For targeted research, query the knowledge base instead of reading everything: - GET https://doublefraction.com/llms?query={question} — plain text passages with source URLs - GET https://doublefraction.com/llms/json?query={question} — the same results as JSON Example: https://doublefraction.com/llms?query=why%20did%20my%20royalty%20check%20stop Approximate size of this response: 1396 tokens.