Pet age calculator template

Free build guide: Pet age calculator for WordPress

This guide rebuilds the Pet age calculator from this site in Gravity Forms: 3 inputs, 5 live results and no submit button. Expect about 24 minutes by hand. The template above is the same form as an import file, and the bundle adds a PDF version of this guide with a screenshot of every setting, plus the stylesheet.

You will end up with:

• Age in human years
• Age in human years
• Age in human years
• Each further year adds
• Each further year adds

What you need

• Gravity Forms (any license) — Calculation fields, drop-down values and conditional logic are in core.

Everything here is core Gravity Forms. No add-ons.

1. Create the form

1. Go to Forms → New Form and name it Pet age.
2. In Form Settings → Form Layout, set the CSS Class Name to fo-live-only. Step 3 uses it to hide the submit button.
3. Leave the form open in the editor; the fields come next.

2. Add the fields, in this order

Field IDs are assigned as you add fields. If yours come out differently, change the {Label:ID} references in the formulas to match your IDs. Settings not mentioned stay at their defaults.

1. Pet · Radio Buttons · ID 1
Custom CSS Class (Appearance tab) fo-segmented.

Choices (tick show values and enter each value):

• Dog — value dog (selected by default)
• Cat — value cat

2. Size · Drop Down · ID 2
Conditional Logic (Advanced tab): Show this field if Pet is Dog..

Choices (tick show values and enter each value):

• Small (under 20 lb) — value 4
• Medium (20–50 lb) — value 5 (selected by default)
• Large (50–90 lb) — value 6
• Giant (over 90 lb) — value 7

3. Age · Drop Down · ID 3

Choices (tick show values and enter each value):

• 1 year — value 1
• 2 years — value 2
• 3 years — value 3
• 4 years — value 4
• 5 years — value 5 (selected by default)
• 6 years — value 6
• 7 years — value 7
• 8 years — value 8
• 9 years — value 9
• 10 years — value 10
• 11 years — value 11
• 12 years — value 12
• 13 years — value 13
• 14 years — value 14
• 15 years — value 15
• 16 years — value 16
• 17 years — value 17
• 18 years — value 18
• 19 years — value 19
• 20 years — value 20

4. Age in human years · Number · ID 4
Number Format 9,999.99; Description “A one-year-old dog or cat is roughly a 15-year-old: fully grown, not fully sensible.”; Custom CSS Class (Appearance tab) fo-result; tick Enable Calculation, Rounding 0; Conditional Logic (Advanced tab): Show this field if Age is 1 year..

15

5. Age in human years · Number · ID 5
Number Format 9,999.99; Description “Rule of thumb: 15 for the first year, 24 at two, then the size-based rate per year.”; Custom CSS Class (Appearance tab) fo-result; tick Enable Calculation, Rounding 0; Conditional Logic (Advanced tab): Show this field if Pet is Dog and Age is not 1 year..

24 + ( {Age:3} - 2 ) * {Size:2}

6. Age in human years · Number · ID 6
Number Format 9,999.99; Description “Rule of thumb: 15 for the first year, 24 at two, then 4 human years per cat year.”; Custom CSS Class (Appearance tab) fo-result; tick Enable Calculation, Rounding 0; Conditional Logic (Advanced tab): Show this field if Pet is Cat and Age is not 1 year..

24 + ( {Age:3} - 2 ) * 4

7. Each further year adds · Number · ID 7
Number Format 9,999.99; Description “Human years per dog year at this size.”; Custom CSS Class (Appearance tab) fo-result fo-result--sub; tick Enable Calculation, Rounding 0; Conditional Logic (Advanced tab): Show this field if Pet is Dog..

{Size:2}

8. Each further year adds · Number · ID 8
Number Format 9,999.99; Description “Human years per cat year.”; Custom CSS Class (Appearance tab) fo-result fo-result--sub; tick Enable Calculation, Rounding 0; Conditional Logic (Advanced tab): Show this field if Pet is Cat..

4

3. Hide the submit button

The results are live, so nothing needs submitting. Add this filter to your theme’s functions.php or a code-snippets plugin; it hides the button on any form carrying the fo-live-only class:

add_filter( 'gform_submit_button', function ( $button, $form ) {
	return str_contains( (string) rgar( $form, 'cssClass' ), 'fo-live-only' ) ? '' : $button;
}, 10, 2 );

Or with CSS alone: .fo-live-only_wrapper .gform_footer { display: none; }

4. Put it on a page and make it look like this

Add the form to any page with the Gravity Forms block, or the shortcode [gravityform id="X" title="false" ajax="false"]. The form inherits your theme’s styles; the classes you set in step 2 are hooks for the look you see on this site:

• fo-result on a calculation field makes it the big teal result panel.
• fo-result fo-result--sub makes the smaller secondary figures.
• fo-segmented on a radio field turns it into a segmented switch.
• Two fields on one row is the editor’s own column layout: drag a field beside another and the row splits in half. No CSS class is needed, and the old gf_left_half Ready Classes are deprecated.

The bundle includes the two stylesheets that implement those classes, with notes on matching your brand colours. Without them the form still works; it just looks like your theme’s default Gravity Forms styling.

How the maths works is explained under “How it’s calculated” on the live Pet age calculator.