Division order decimal interest calculator
Work out the decimal interest on your oil & gas division order from your net mineral acres, the spacing-unit size, and your royalty rate. Enter your numbers and the exact formula prints below the result — so you can verify what the operator sent you.
Not sure the decimal is right? See what net revenue interest means →
This is an estimate to check against your division order — not legal or financial advice. Division orders carry up to 8 decimal places; verify this figure against the decimal the operator printed, and confirm the unit size, royalty rate, and participation they used. If the numbers do not match, ask the operator before you sign.
How the decimal is calculated
A division order decimal is the exact slice of a well's revenue that belongs to you. The formula is:
decimal interest = (net mineral acres ÷ unit acres) × royalty rate × participation
Worked example: 20 net mineral acres in a 640-acre unit at a 3/16 (0.1875) royalty, with full participation, gives 20 ÷ 640 × 0.1875 × 1 = 0.00585938. Multiply that decimal by the well's gross revenue to see your royalty before taxes and deductions.
Wondering whether the royalty stream is worth more as cash today than as monthly checks? Read our guide to selling mineral rights, and see the net revenue interest definition for how the decimal relates to your take-home share.
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Division order decimal interest — FAQ
What is a division order in oil and gas?
A division order is a document an operator sends you before it pays royalties. It states the decimal interest — the exact fraction of the well's production revenue that belongs to you — and asks you to confirm your identity and ownership. Signing it does not sell or change your minerals; it authorizes the operator to pay you on that decimal. Always check the decimal against your own math before you sign.
How is decimal interest calculated on a division order?
Decimal interest = (your net mineral acres ÷ the spacing-unit acres) × your royalty rate, times any tract participation factor. Example: 20 net mineral acres in a 640-acre unit at a 3/16 (0.1875) royalty gives 20 ÷ 640 × 0.1875 = 0.00585938. That decimal, multiplied by the well's revenue, is your royalty check before taxes and deductions.
What is net revenue interest?
Net revenue interest (NRI) is the share of production revenue an owner actually receives after the royalty and lease burdens are applied. For a mineral or royalty owner, the decimal interest on a division order is your net revenue interest in that well. See our net revenue interest definition for how it differs from working interest.
Why is my decimal interest different than I expected?
Common reasons: the unit is larger or smaller than you assumed, your net mineral acres differ from gross acres because you own a fraction, the royalty rate on your lease is not what you remembered, or a tract-participation factor applies when your acreage only partly falls inside the unit. Title issues, prior conveyances, and reserved fractions also move the number. If the operator's decimal still looks wrong after you re-run the math, ask them for the unit size and participation used.