# Royalty Interest number and acreage
**URL:** https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745
**Category:** Grady County, OK
**Created:** [October 2, 2019, 2:24am UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745 "2019-10-02T02:24:29Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@TimH](https://www.mineralrightsforum.com/u/TimH)
#### Post date: [October 2, 2019, 2:24am UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/1 "2019-10-02T02:24:29Z")
Hi, can someone tell me how to calculate how many acres I have from the Royalty Interest number provided by the company?
For example: Royalty Interest number is 0.00016351
---
### Author:  [@TODD\_M\_Baker](https://www.mineralrightsforum.com/u/TODD_M_Baker)
#### Post date: [October 2, 2019, 12:08pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/2 "2019-10-02T12:08:19Z")
Tim: Need more information, i.e., Unit size, royalty percentage & whether 640 acre unit or multi-section unit. If multi-section unit, the percentage of participation for the unit that your minerals are under. If you have the DO, this information should be on there.
Then we can get you the answer to your question.
Example for you, based on 3/16ths royalty and 640 acre unit: 0.00016351 X 640.00 divided by 0.1875 = 0.558114 net acres.
---
### Author:  [@Carl\_B\_Gillette](https://www.mineralrightsforum.com/u/Carl_B_Gillette)
#### Post date: [October 2, 2019, 2:23pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/3 "2019-10-02T14:23:55Z")
Tim, The formula for arriving at royalty interest is spacing unit (size of drilling unit—you can look this up on the OCC Production website) divided by net mineral acreage (this of course is what you’re wanting to find) times royalty from lease (you can get this from lease or revenue statements) times % of perforations if the well is multi-unit (most horizontals are 640 acre spacing) = royalty interest (RI as read off your revenue statement). So for example 640/3.33 \* .125 (1/8th royalty) \* 1 (assuming 100% perforations) = .0006503. So once you have all the variables just plug in simple algebra equation and solve for net mineral acreage (NMA).
---
### Author:  [@TimH](https://www.mineralrightsforum.com/u/TimH)
#### Post date: [October 2, 2019, 3:32pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/4 "2019-10-02T15:32:50Z")
Here’s a little more info.
The property name is SINCLAIR 1-15-22XH. We got pooled by Continental and are awaiting answers from them also. But does the name of the well help any?
---
### Author:  [@TimH](https://www.mineralrightsforum.com/u/TimH)
#### Post date: [October 2, 2019, 3:34pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/5 "2019-10-02T15:34:37Z")
Also property description: Sec 15-4N-5W (48.22%) Also Sec 15 (640).
---
### Author:  [@TODD\_M\_Baker](https://www.mineralrightsforum.com/u/TODD_M_Baker)
#### Post date: [October 3, 2019, 6:01pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/6 "2019-10-03T18:01:22Z")
Carl: Your simple algebraic equation contains an error: should be 3.33/640 \* 0.125 \* 1 = 0.006503. Just transposed the 3.33/640.
---
### Author:  [@graceful99](https://www.mineralrightsforum.com/u/graceful99)
#### Post date: [October 4, 2019, 8:29pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/7 "2019-10-04T20:29:19Z")
Would this be correct? 10.5 acres (my interest)/640 x 0.1875 (3/16) x 50%. (Assuming division is 50/50 with Section 3 as projected.) = 0.0015381
---
### Author:  [@Carl\_B\_Gillette](https://www.mineralrightsforum.com/u/Carl_B_Gillette)
#### Post date: [October 4, 2019, 11:31pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/8 "2019-10-04T23:31:57Z")
Grace, You wouldn’t apply the 50% unless the well is a multi-unit such as 1280 acres. Some of the newer horizontals are indeed two-section wells and you should be able to determine that from the well information off of the OCC site.
---
### Author:  [@TODD\_M\_Baker](https://www.mineralrightsforum.com/u/TODD_M_Baker)
#### Post date: [October 5, 2019, 3:26am UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/9 "2019-10-05T03:26:38Z")
Grace- you are correct. Carl- because Grace’s minerals are under a 640-acre unit that is only 50% of the multi-unit, you have to take 50% of the normal NRI to get the correct decimal. If it is a 1280-acre unit, the calculations would be 10.5/1280 x .1875.
---
### Author:  [@graceful99](https://www.mineralrightsforum.com/u/graceful99)
#### Post date: [October 5, 2019, 5:22am UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/10 "2019-10-05T05:22:53Z")
Thanks guys! The way I figure it I will get about .08 for each barrel of oil. I can’t get too excited about that.
---
### Author:  [@Lee\_Cooper](https://www.mineralrightsforum.com/u/Lee_Cooper)
#### Post date: [October 5, 2019, 2:22pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/11 "2019-10-05T14:22:40Z")
In a multi-unit well would the % of perforations in each unit be the multiplier vs. the 50% of the normal NRI?
---
### Author:  [@TODD\_M\_Baker](https://www.mineralrightsforum.com/u/TODD_M_Baker)
#### Post date: [October 5, 2019, 11:36pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/12 "2019-10-05T23:36:56Z")
Lee- the 50% is only an estimate before the well is drilled. Use the actual percentage when the final order is signed. Not sure what you mean by normal NRI.
---
### Author:  [@MRFAdmin\_SV](https://www.mineralrightsforum.com/u/MRFAdmin_SV)
#### Post date: [January 11, 2025, 6:11pm UTC](https://www.mineralrightsforum.com/t/royalty-interest-number-and-acreage/51745/13 "2025-01-11T18:11:17Z")