The dry parcel land value in The United States (excluding EM, mineral, riparian, etc.) given by Slate is approximately $14.5 trillion. With a rental yield rate of 3.9% given by globalpropertyguide.com , dry parcel land in The United States has a rental value of $565 billion.
According to newamerica.net the total rent of the EM spectrum in The United States is estimated at $771 billion. This is the current rental value and stands regardless of the rental yield rate.
Various links from the eia.gov provide a rough estimate of the rental value of fossil fuel producing land. This was arrived at by looking at the commodity price of various fossil fuel products, subtracting costs, and looking at the units per year that the various producing lands provide.
These are fairly minor contributors to the total economic land value in The United States, but they do figure moderately into indicidental costs for individuals. I was not able to gather decent figures on riparian value (for instance, The Ogallala Aquifer), nor fishing, grazing, or logging values.
Current rents are yielding approximately $1.4 trillion per year. But that's on top of the current taxes levied. That is to say that if the all current taxes were removed, most if not all of the gains would eventually find there way into raised rents. Because LVT is measured by rent, and because economic land is not produced, the tax cannot diminish its own base. After a few iterations, it is expected the tax rate would stabilize.
The initial ATCOR rate set in the calculator is 95%. Using that figure means that 95% of the removed taxes find their way into rent of land, allowing land to yield $1.4 trillion + (0.95 * $sum_of_non_lvt_taxes)
The perfect is often the enemy of the good; it's possible that trying to capture every last drop of LVT could lead to capturing too much in taxes - which hurts production. It might also completely destroy the ability for price signals to work. Many geoists support collecting less than 100% of the rental value to still allow a private market with price signals and allow looser estimates.
The initial LVT Capture rate set in the calculator is 85%. Using that figure allows land to yield ($1.4 trillion + (ATCOR * $sum_of_non_lvt_taxes) * CAPTURE_RATE
The personal share of LVT is assumed to be one's land value over the total land value.
For renters (in the colloquial sense of the word), the resource value is what the landlord owns. Per David Ricardo's Law of Rent, the landlord cannot pass increases due to land value tax (or other taxes on monopoly privilege) onto tenants.
This calculator naively assumes that all non-LVT taxes are removed and taxes are collected at a federal level and dispursed. This is not what many geoists recommend, nor is this what I recommend. It also assumes that all states have homogenous rates of spending in certain areas per capita which is not true. These decisions were made for simplicity, and to see roughly what kind of UBI and tax receipt level pure LVT could support.
Most of the tax figures are from 2013 which is slightly dated.
A lot of programs are "mandatory," and could not be simply cut or canceled. The calculator does not consider the effects of taking land off of the tax rolls for the elderly or disabled.