Show them what their land could earn.

An agency built this for a land marketplace. A landowner gives the size of the plot, the unit it was measured in, where it is and which schemes could apply, and the form works out what it might earn in a year.

See the plugins See how it works

Moonacre income Per year

Sonoma County

18 acres

Potential yearly income$10,920Illustrative estimate

Carbon credits

Convert area units Apply stream rate Total yearly income

Area, location and the selected income streams shape the estimate.

Illustrative experience

A figure they earn, not a price they pay
Every unit standardised before it is priced
The whole calculation stays on the entry

The finished experience

The number they came for, and the lead you came for.

A prospect leaves with a figure worth having, and you keep an entry with every value the calculation used still attached to it.

A good fit for
Marketplaces and agencies whose prospects want a number before they will talk to anyone.

1

Ask about the plot

The size, the unit it was measured in, where the land is, and which income streams could apply to it. Conditional logic keeps the questions that do not apply off the screen.

Gravity Forms
2

Convert the units, then price each stream

A hidden field for each stream runs an if/elseif formula that standardises whatever unit was entered, then applies your rate for that stream and location.

GP Advanced Calculations
3

Total it, then send it

One more hidden field adds the streams together. The visitor signs up to have the figure emailed, and the entry keeps every value the number was built from.

GP Advanced Calculations

Inspired by a real build

Spotlight: Works Digital’s Magic Land Value Calculation Formula February 2025 Works Digital built a land income calculator as a marketing tool for one of their customers. See how it makes sorcerous use of GP Advanced Calculations. Read the spotlight

What you’ll need.

Start with Gravity Forms. Add the capabilities this solution needs, then make the experience your own.

GP Advanced Calculations

Runs the conditional formulas — one per income stream — that standardise whatever unit was entered and turn it into a yearly figure.

Explore GP Advanced Calculations

Taking it further

Add these optional plugins when your project calls for more.

Optional

GP Populate Anything

Brings the scheme and location choices, and the rates behind them, in from records you maintain, so a changed rate is a record edit instead of a formula edit.

Explore GP Populate Anything

Before you start

A rate for each income stream, and a hidden field to work each one out.

Get this built.

A plan covers how many of our plugins you run at once, and on how many sites. Here is what this one needs.

Required

GP Advanced CalculationsPerks

Optional

GP Populate AnythingPerks

Gravity Perks Basic $59 /year

Covers this on one site. More sites need Advanced or Pro.

Gravity Perks Advanced $169 /year Taking the optional perk too makes it 2 in all, which needs Advanced.

See plans for this solution

Every plan renews at the same price, and you can upgrade any time for the difference.

Make it fit
your project.

Why keep the calculations hidden?

The visitor only needs the yearly figure. Holding each stream in its own hidden field means you can still see how the number was reached on the entry, without putting the working on the page.

What happens when a rate changes?

In the original build the rate sits inside the formula, so changing one is a one-line edit and the calculator carries on giving current figures. If you would rather not open a formula at all, populate the rate into a field from a record you maintain and have the formula read that field instead.

Can it handle more than one unit?

Yes. The formula tests which unit was chosen and standardises the area before applying the rate. The original did it with five unit branches in a single formula.