Free check
Is the decimal on my division order right?
Your lease
We read the acres the operator filed on its drilling permits.
Texas oil lease · RRC 08-58035 · Midland County
Interstate 8-32 C
Operated by Diamondback E&P LLC. State record through Jul 2026.
It is in the lease: 1/8, 3/16, 1/5 and 1/4 are common.
Acres in the tract times your share of the minerals. Own half of 80 acres: 40.
Leave it empty to use the 978.59 acres on the state's newest permit, or type the acres from your division order.
Enter it to see what unit size it implies.
The decimal your acres should give
0.01021878
Compare it with your division order.
- Royalty fraction
- 0.25
- Your net acres
- 40
- Acres in the unitfrom the state's permit
- 978.59
- Your share of the unit
- 4.0875%
- Decimal interest
- 0.01021878
Your decimal
0.00781250
It is 23.5% below the decimal worked out from your acres.
For your acres and royalty to give that decimal, the unit would be 1,280 acres, not the 978.59 used above. Or, on 978.59 acres, the operator would be paying you for 30.58 net acres, not 40.
Ask the operator for the unit plat and how it got this decimal.
This is the sample owner
An allocation well is on this lease
What the state shows for Interstate 8-32 C
5 wells on the lease, 5 horizontal. The newest permit states 978.59 acres, issued Dec 21, 2021.
SourceRailroad Commission drilling permits and wellbore file, Sep 26, 2026. The acres are what the operator filed; they are not a survey.
Have the division order or a statement?
We compare the decimal on every line with the county appraisal roll and the state record, and tell you what does not add up.
Check my statementLease page for Interstate 8-32 C. Not sure of your acres? Work a decimal from scratch.
How the decimal is worked out
The formula
- Your share of the unit
- your net acres ÷ acres in the unit
- Your decimal
- your royalty fraction × your share of the unit
- The unit it implies
- royalty × net acres ÷ the decimal on your division order
- Verdict
- within 0.5%: agrees. Within 3%: close. More: ask why.
The bands are ours. A printed decimal is rounded, so a small difference is normal.
What to do with a difference
- Ask for the unit plat. It shows which tracts are in the unit and how many acres it has.
- Check your net acres. A deed can give a fraction of a tract, or minerals can have been split among heirs. The decimal calculator works it from the pieces.
- Ask about allocation. A well across several tracts uses a formula, and the operator should give it to you on request.
The decimal is on every line of your statement. Upload one and we compare it with the county roll and the state record.
Questions owners ask
Common questions
Short answers. Sources are at the end of the page.
How is a royalty decimal worked out?
Your royalty fraction times your net mineral acres divided by the acres in the unit the well is drilled on. Own 40 net acres with a 1/4 royalty in a 640-acre unit: 0.25 x 40 / 640 = 0.015625. The operator prints the result on your division order and on every statement.
Where do I find the unit acres?
On your division order or the operator's unit plat. The Railroad Commission drilling permit also states the acreage the operator filed for the well, and this tool reads it for you. When a lease has several wells on different permits the acres can differ, so use the number for the well you are paid on.
My decimal is smaller than the tool says. Is the operator underpaying me?
Not necessarily. It is a reason to ask. The operator may use a different unit size than the permit, your net acres may differ from the deed, or the well may be an allocation or production sharing well where production is divided by a formula rather than by acres. Ask for the unit plat and the calculation.
What is an allocation well?
A well drilled across more than one tract or unit. Its production is divided among the tracts by an agreed formula, so your decimal is your tract's allocation percentage times your share of the tract, not your acres over one unit's acres. The Railroad Commission marks these wells on the permit.
What does 'implied unit acres' mean?
It is the unit size that would turn your royalty and your net acres into the decimal printed on your division order. If it is far from the acres on the permit, one of the numbers in the calculation is different from the one you were told.
Does the county appraisal roll show my decimal?
Some appraisal districts print a decimal interest for each mineral account. When one does, our statement check compares it with the decimal on your statement. That is a second opinion, not a proof: the district gets the number from the operator too.
Free check
Rather have us check the statement?
Upload it. We compare every month with the Railroad Commission record and give you the questions to ask.