# Mineral Rights Calculator: Value, NRA, Decimal, Doc Stamps

> Thirteen free calculators for mineral owners: royalty value, net royalty acres, decimal decoder, doc stamps, offer normalizer, and broker vs direct net proceeds.

Source: https://www.berlinroyalties.com/mineral-rights-calculator/
Publisher: Berlin Royalties, a veteran-owned oil and gas mineral and royalty buyer in Tulsa, Oklahoma, buying for its own account since 2014. Call or text 918-984-1645.
License: free to quote and cite with attribution to Berlin Royalties and a link to the source URL.

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## Mineral rights calculators.

Thirteen free calculators for mineral and royalty owners: what a producing royalty might sell for, net royalty acres, your division order decimal, doc stamps, and what a broker actually nets you. The same arithmetic buyers use, in your hands. Estimates, not offers, but honest ones.

### Two bigger tools

[The offer checker](https://www.berlinroyalties.com/offer-checker/) takes an offer you have received and works out what the buyer must be assuming to justify it, plus the questions worth asking them. [The section, township and range map](https://www.berlinroyalties.com/section-township-range-map/) draws any Oklahoma legal description, shows the sections touching yours, and computes aliquot acreage.

### What might my producing royalty sell for?

Buyers typically pay a multiple of your average monthly royalty check, commonly 3 to 5 years' worth depending on decline, commodity mix, and nearby activity.

Average monthly royalty (last 12 months)

Enter your average monthly check to see a range.

New wells decline fast, so a recent first check overstates the durable average. For a real number on your specific wells, [ask us](https://www.berlinroyalties.com/free-valuation/).

### Net mineral acres (NMA) and net royalty acres (NRA)

Your fractional interest times the gross acres in the tract. Add your royalty rate to see net royalty acres, the unit most buyers quote today.

Gross acres in the tract

Your fractional interest

Royalty rate (optional, for NRA)

Enter gross acres and your fraction.

One net royalty acre equals one net mineral acre leased at a 1/8 royalty, so NRA = NMA times your royalty divided by 1/8. A 3/16 lease turns 10 NMA into 15 NRA. Fractions like 3/32 are fine in any box.

### Division order decimal check

Net acres ÷ unit acres × royalty rate. Use it to verify what the operator sent you.

Your net mineral acres in the unit

Unit size (acres)

Royalty rate

Enter your numbers to compute the decimal.

If the decimal on your division order doesn't match, don't sign it yet. [Here's why.](https://www.berlinroyalties.com/oil-scout/should-you-sign-your-division-order-in-oklahoma/)

### Decimal decoder: what do I own?

All you have is the decimal on a check stub or division order? Run it backward to your net mineral acres and net royalty acres.

Your revenue decimal

Unit size (acres)

Royalty rate on your lease

Allocation factor (multi-unit wells; leave 1 if unsure)

Enter your decimal, unit size, and royalty.

NMA = decimal × unit ÷ royalty ÷ allocation. NRA = decimal × unit ÷ 1/8 ÷ allocation. On a multi-unit horizontal well, your decimal is scaled by the share of the lateral in your section; that share is the allocation factor, printed on the division order.

### Doc stamp decoder: what did the minerals next door sell for?

Oklahoma charges documentary stamp tax of $0.75 per $500 of price on recorded deeds. The stamps are printed on the deed, so any recorded sale can be run backward to the price paid.

Doc stamps shown on the deed ($)

Net acres conveyed (optional, from the deed)

Enter the doc stamp amount from a recorded deed.

Stamps round up to the next $500 of price, so the decoded number is accurate to within $500. Deeds marked exempt, and deeds between family members or related entities, carry no stamps and can't be decoded. Oklahoma only; Texas has no deed stamp tax.

### Royalty check estimator

Your decimal times the well's production and prices, less typical deductions. Use it to sanity-check a new well or verify an existing check.

Your revenue decimal

Well oil sales (barrels per month)

Oil price ($/bbl)

Well gas sales (mcf per month)

Gas price ($/mcf)

Post-production deductions (%)

Enter your decimal and the well's monthly volumes.

Monthly well volumes are public record in most states. Gathering, processing, and transport deductions commonly run 5 to 15 percent on gas, less on oil, depending on your lease language. If your actual checks run well below this estimate, something is worth a look.

### Inherited fraction splitter

Minerals split as they pass down. Multiply the chain of fractions to find what reached you.

Chain of fractions, separated by ×, x, *, or commas

Gross acres in the original tract (optional)

Example: grandparents owned half, split among 3 children, then 4 grandchildren: 1/2 x 1/3 x 1/4.

If different generations took unequal shares, or someone's share went through a will rather than intestacy, the clean chain breaks. Send us the documents and [we will run the title](https://www.berlinroyalties.com/free-valuation/) at no cost.

### Take the lump sum or keep collecting?

A royalty stream declines as the wells do. This compares an offer in hand against the present value of holding, using your own assumptions.

Current average monthly royalty ($)

Annual production decline (%)

Discount rate (%)

Offer on the table ($, optional)

Enter your monthly royalty to see the present value of holding.

Runs 30 years of declining income discounted to today. Mature wells often decline 5 to 10 percent a year; wells in their first years decline far faster, sometimes 50 percent or more. The discount rate is what your money could earn elsewhere, adjusted for the risk of prices and wells. This is arithmetic, not advice: taxes, new drilling, and your own situation all matter, and [sometimes the right answer is don't sell](https://www.berlinroyalties.com/when-not-to-sell/).

### Looking up an operator?

Operators in Oklahoma, Texas, Kansas, Colorado, and Wyoming, searchable by name or number, with address and phone. No spreadsheet download required.

[Search the Operator Directory](https://www.berlinroyalties.com/operators/)

### Got a pooling order?

Oklahoma gives you 20 days to elect. We built a dedicated calculator that compares every bonus option against participating in the well, with the math shown.

[Pooling Election Calculator](https://www.berlinroyalties.com/pooling-election-calculator/)

## The landman's corner

Tools from our own deal desk, for the folks who work the courthouse and the data rooms. If you hold overrides from a career of deals, [we buy those too](https://www.berlinroyalties.com/unusual-royalty-interests/).

### Multi-unit WI / NRI and cost to participate

Weighted working interest across up to three units of a multi-unit horizontal, and your share of the AFE.

Unit 1: net acres

Unit 1: gross acres / allocation

Unit 2: net acres

Unit 2: gross acres / allocation

Unit 3: net acres

Unit 3: gross acres / allocation

Average unit NRI (decimal)

Total AFE ($)

Enter at least one unit's net acres, gross acres, and allocation.

Weighted WI = Σ (net ÷ gross × allocation). Weighted NRI = weighted WI × average unit NRI. Cost to participate = weighted WI × AFE. Average unit NRI runs 0.75 to 0.80 in most modern OK units; check the pooling order or your title work.

### Retained override (ORRI) scenario value

Assigning leasehold and keeping an override? This computes the retained ORRI decimal and what it earns under a payback scenario.

Working interest assigned (decimal)

Avg NRI you hold (decimal)

Avg NRI you deliver (decimal)

AFE ($)

Gross revenue as multiple of AFE

Enter your WI and the NRI you hold and deliver.

Retained ORRI = WI × (NRI held − NRI delivered). The scenario value is what that override earns if the well grosses the chosen multiple of its AFE: a 1.25x well is a modest one, so treat that as a floor case, not a valuation.

### Farmout carry calculator

What a carry really costs the farmee, expressed per acre earned.

Spacing unit (acres)

AFE ($)

Farmor net acreage

Farmor carry (%)

Enter the unit, AFE, farmor acreage, and carry percentage.

Carry cost = (carried net acres ÷ unit) × AFE. Cost per acre earned = carry cost ÷ acres earned. Compare that per-acre number against what leases trade for in the section before you shake hands.

### Offer normalizer: compare offers that are quoted differently

One buyer quotes a lump sum, one quotes dollars per net mineral acre, one quotes per net royalty acre, and a fourth talks in months of income. Put any offer in here and see all four numbers so you are comparing like with like.

Total offer (dollars)

Net mineral acres being sold

Royalty rate on the lease

Average monthly royalty (optional)

Enter the offer and your net mineral acres.

Net royalty acres are the honest common denominator, because a 1/4 lease is worth twice a 1/8 lease on the same dirt. Two owners in the same section with identical net mineral acres can get very different per-acre offers for exactly that reason, and neither buyer is cheating.

### Broker, auction, or direct sale: what do you actually keep?

A competitive process can raise the gross price, and it also costs a commission. This compares net proceeds honestly by letting you set how much uplift you think the process will produce.

Direct offer in hand (dollars)

Expected uplift from a marketed sale (%)

Broker commission (%)

Auction fee, buyer's premium or seller's fee (%)

Extra weeks a marketed sale takes

Enter your direct offer and the uplift you expect a marketed sale to produce.

We are a direct buyer, so read this with that in mind. The honest version is that brokers and auctions frequently do raise the gross price, especially on large, clean, producing packages where many buyers will compete. They earn less than their fee on small, messy, or non-producing interests where few buyers show up. Our [broker or direct](https://www.berlinroyalties.com/broker-or-direct/) page walks through which is which, and we tell people to go list it when that is the right answer.

### Calculators estimate. We underwrite.

Your actual value depends on your wells, their decline, and the activity around your section. That research is free here, with the work shown.

[Get a Free Valuation](https://www.berlinroyalties.com/free-valuation/)